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Nhat Pham cf264e1329 cachestat: implement cachestat syscall 
There is currently no good way to query the page cache state of large file
sets and directory trees.  There is mincore(), but it scales poorly: the
kernel writes out a lot of bitmap data that userspace has to aggregate,
when the user really doesn not care about per-page information in that
case.  The user also needs to mmap and unmap each file as it goes along,
which can be quite slow as well.

Some use cases where this information could come in handy:
  * Allowing database to decide whether to perform an index scan or
    direct table queries based on the in-memory cache state of the
    index.
  * Visibility into the writeback algorithm, for performance issues
    diagnostic.
  * Workload-aware writeback pacing: estimating IO fulfilled by page
    cache (and IO to be done) within a range of a file, allowing for
    more frequent syncing when and where there is IO capacity, and
    batching when there is not.
  * Computing memory usage of large files/directory trees, analogous to
    the du tool for disk usage.

More information about these use cases could be found in the following
thread:

https://lore.kernel.org/lkml/20230315170934.GA97793@cmpxchg.org/

This patch implements a new syscall that queries cache state of a file and
summarizes the number of cached pages, number of dirty pages, number of
pages marked for writeback, number of (recently) evicted pages, etc.  in a
given range.  Currently, the syscall is only wired in for x86
architecture.

NAME
    cachestat - query the page cache statistics of a file.

SYNOPSIS
    #include <sys/mman.h>

    struct cachestat_range {
        __u64 off;
        __u64 len;
    };

    struct cachestat {
        __u64 nr_cache;
        __u64 nr_dirty;
        __u64 nr_writeback;
        __u64 nr_evicted;
        __u64 nr_recently_evicted;
    };

    int cachestat(unsigned int fd, struct cachestat_range *cstat_range,
        struct cachestat *cstat, unsigned int flags);

DESCRIPTION
    cachestat() queries the number of cached pages, number of dirty
    pages, number of pages marked for writeback, number of evicted
    pages, number of recently evicted pages, in the bytes range given by
    `off` and `len`.

    An evicted page is a page that is previously in the page cache but
    has been evicted since. A page is recently evicted if its last
    eviction was recent enough that its reentry to the cache would
    indicate that it is actively being used by the system, and that
    there is memory pressure on the system.

    These values are returned in a cachestat struct, whose address is
    given by the `cstat` argument.

    The `off` and `len` arguments must be non-negative integers. If
    `len` > 0, the queried range is [`off`, `off` + `len`]. If `len` ==
    0, we will query in the range from `off` to the end of the file.

    The `flags` argument is unused for now, but is included for future
    extensibility. User should pass 0 (i.e no flag specified).

    Currently, hugetlbfs is not supported.

    Because the status of a page can change after cachestat() checks it
    but before it returns to the application, the returned values may
    contain stale information.

RETURN VALUE
    On success, cachestat returns 0. On error, -1 is returned, and errno
    is set to indicate the error.

ERRORS
    EFAULT cstat or cstat_args points to an invalid address.

    EINVAL invalid flags.

    EBADF  invalid file descriptor.

    EOPNOTSUPP file descriptor is of a hugetlbfs file

[nphamcs@gmail.com: replace rounddown logic with the existing helper]
  Link: https://lkml.kernel.org/r/20230504022044.3675469-1-nphamcs@gmail.com
Link: https://lkml.kernel.org/r/20230503013608.2431726-3-nphamcs@gmail.com
Signed-off-by: Nhat Pham <nphamcs@gmail.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Brian Foster <bfoster@redhat.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 		2023-06-09 16:25:16 -07:00
..
android binder: return pending info for frozen async txns 2023-01-19 17:14:18 +01:00
byteorder
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caif
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can can: raw: add CAN XL support 2022-09-15 09:08:09 +02:00
cifs
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dvb Merge tag 'br-v6.2i' of git://linuxtv.org/hverkuil/media_tree into media_stage 2022-12-07 17:58:47 +01:00
genwqe
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hdlc
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hsi headers: Remove some left-over license text in include/uapi/linux/hsi/ 2022-11-17 22:49:39 +01:00
iio iio: add modifers for pitch, yaw, roll 2022-09-21 18:42:55 +01:00
isdn
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misc
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mmc
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netfilter netfilter: nfnetlink hook: dump bpf prog id 2023-04-21 11:34:14 -07:00
netfilter_arp
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netfilter_bridge
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netfilter_ipv4
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netfilter_ipv6 netfilter: ip6t_LOG: Fix a typo in a comment 2022-08-09 19:51:05 +02:00
nfsd NFSD: Handle new xprtsec= export option 2023-04-27 18:49:24 -04:00
raid
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sched
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spi
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sunrpc
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surface_aggregator
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tc_act net/sched: act_tunnel_key: add support for "don't fragment" 2023-03-30 23:24:24 -07:00
tc_ematch
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usb usb: uvc: Enumerate valid values for color matching 2023-02-06 13:46:42 +01:00
a.out.h
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acct.h
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acrn.h virt: acrn: Mark the uuid field as unused 2022-11-23 19:55:22 +01:00
adb.h
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adfs_fs.h
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affs_hardblocks.h
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agpgart.h
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aio_abi.h
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am437x-vpfe.h
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amt.h
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apm_bios.h
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arcfb.h
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arm_sdei.h
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aspeed-lpc-ctrl.h
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aspeed-p2a-ctrl.h
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aspeed-video.h media: aspeed: Support aspeed mode to reduce compressed data 2022-11-04 16:56:41 +01:00
atalk.h
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atm.h
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atm_eni.h
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atm_he.h
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atm_idt77105.h
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atm_nicstar.h
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atm_tcp.h
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atm_zatm.h net: atm: bring back zatm uAPI 2022-08-11 10:31:19 -07:00
atmapi.h
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atmarp.h
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atmbr2684.h atm: uapi: fix spelling typos in comments 2022-12-22 18:18:37 -08:00
atmclip.h
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atmdev.h Move COMPAT_ATM_ADDPARTY to net/atm/svc.c 2023-03-10 21:05:16 +01:00
atmioc.h
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atmlec.h
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atmmpc.h
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atmppp.h
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atmsap.h
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atmsvc.h
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audit.h audit: fix undefined behavior in bit shift for AUDIT_BIT 2022-10-31 07:29:47 -04:00
auto_dev-ioctl.h
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auto_fs.h
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auto_fs4.h
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auxvec.h rseq: Introduce feature size and alignment ELF auxiliary vector entries 2022-12-27 12:52:10 +01:00
ax25.h
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batadv_packet.h batman-adv: tvlv: prepare for tvlv enabled multicast packet type 2023-01-21 19:01:59 +01:00
batman_adv.h
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baycom.h
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bcm933xx_hcs.h
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bfs_fs.h
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binfmts.h
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blkpg.h
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blktrace_api.h
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blkzoned.h
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bpf.h bpf: add bpf_link support for BPF_NETFILTER programs 2023-04-21 11:34:14 -07:00
bpf_common.h
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bpf_perf_event.h
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bpfilter.h
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bpqether.h
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bsg.h
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bt-bmc.h
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btf.h
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btrfs.h btrfs: scrub: reject unsupported scrub flags 2023-04-17 19:52:19 +02:00
btrfs_tree.h btrfs: add nr_global_roots to the super block definition 2022-12-05 18:00:58 +01:00
cachefiles.h
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can.h can: canxl: introduce CAN XL data structure 2022-09-15 09:08:09 +02:00
capability.h capabilities: fix undefined behavior in bit shift for CAP_TO_MASK 2022-11-05 01:25:57 -04:00
capi.h
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cciss_defs.h
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cciss_ioctl.h
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ccs.h
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cdrom.h
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cec-funcs.h media: cec: add support for Absolute Volume Control 2022-09-24 08:50:04 +02:00
cec.h media: cec: add support for Absolute Volume Control 2022-09-24 08:50:04 +02:00
cfm_bridge.h
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cgroupstats.h
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chio.h
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close_range.h
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cn_proc.h
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coda.h
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coff.h
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comedi.h
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connector.h
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const.h uapi/linux/const.h: prefer ISO-friendly __typeof__ 2023-04-18 16:39:34 -07:00
coresight-stm.h
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counter.h counter: Introduce the Count capture component 2022-09-30 14:32:35 +02:00
cramfs_fs.h
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cryptouser.h
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cuda.h
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cxl_mem.h cxl/mbox: Deprecate poison commands 2023-04-22 14:41:30 -07:00
cyclades.h
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cycx_cfm.h
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dcbnl.h net: dcb: add new rewrite table 2023-01-20 09:33:22 +00:00
dccp.h
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devlink.h devlink: Expose port function commands to control migratable 2022-12-07 20:09:18 -08:00
dlm.h fs: dlm: remove deprecated code parts 2023-03-06 15:49:07 -06:00
dlm_device.h
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dlm_plock.h
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dlmconstants.h fs: dlm: remove deprecated code parts 2023-03-06 15:49:07 -06:00
dm-ioctl.h dm: split discards further if target sets max_discard_granularity 2023-03-30 15:57:50 -04:00
dm-log-userspace.h
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dma-buf.h
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dma-heap.h
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dns_resolver.h
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dqblk_xfs.h
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dw100.h media: uapi: Add a control for DW100 driver 2022-08-29 15:32:13 +02:00
edd.h
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efs_fs_sb.h
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elf-em.h
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elf-fdpic.h
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elf.h LoongArch changes for v6.3 2023-03-01 09:27:00 -08:00
errno.h
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errqueue.h
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erspan.h
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ethtool.h net: ethtool: netlink: retrieve stats from multiple sources (eMAC, pMAC) 2023-01-23 12:44:18 +00:00
ethtool_netlink.h ethtool: Add support for configuring tx_push_buf_len 2023-03-27 19:49:58 -07:00
eventpoll.h Move ep_take_care_of_epollwakeup() to fs/eventpoll.c 2023-03-10 21:05:16 +01:00
ext4.h ext4: Add a uapi header for ext4 userspace APIs 2023-04-19 23:39:42 -04:00
f2fs.h f2fs: introduce F2FS_IOC_START_ATOMIC_REPLACE 2022-11-28 12:46:23 -08:00
fadvise.h
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falloc.h
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fanotify.h fanotify: define struct members to hold response decision context 2023-02-07 12:53:53 +01:00
fb.h
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fcntl.h mm/memfd: add F_SEAL_EXEC 2023-01-18 17:12:37 -08:00
fd.h
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fdreg.h
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fib_rules.h
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fiemap.h
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filter.h
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firewire-cdev.h
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firewire-constants.h
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fou.h ynl: broaden the license even more 2023-03-16 21:20:32 -07:00
fpga-dfl.h
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fs.h
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fscrypt.h fscrypt: remove unused Speck definitions 2022-12-01 19:58:50 -08:00
fsi.h
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fsl_hypervisor.h
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fsl_mc.h
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fsmap.h
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fsverity.h
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fuse.h fuse: optional supplementary group in create requests 2023-01-26 17:10:38 +01:00
futex.h
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gameport.h
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gen_stats.h
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genetlink.h genetlink: correct uAPI defines 2022-08-10 13:49:50 +01:00
gfs2_ondisk.h
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gpio.h
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gsmmux.h tty: n_gsm: add ioctl for DLC specific parameter configuration 2023-03-29 10:50:48 +02:00
gtp.h
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handshake.h net/handshake: Enable the SNI extension to work properly 2023-05-24 22:05:24 -07:00
hash_info.h
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hdlc.h
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hdlcdrv.h
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hdreg.h
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hid.h HID: convert defines of HID class requests into a proper enum 2022-09-20 11:53:32 +01:00
hiddev.h
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hidraw.h
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hpet.h
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hsr_netlink.h
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hw_breakpoint.h Move bp_type_idx to include/linux/hw_breakpoint.h 2023-03-10 21:05:16 +01:00
hyperv.h
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i2c-dev.h
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i2c.h
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i2o-dev.h
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i8k.h
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icmp.h
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icmpv6.h
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idxd.h dmaengine: idxd: process batch descriptor completion record faults 2023-04-12 23:18:45 +05:30
if.h
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if_addr.h
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if_addrlabel.h
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if_alg.h crypto: af_alg - Support symmetric encryption via keyring keys 2022-10-28 12:36:34 +08:00
if_arcnet.h
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if_arp.h
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if_bonding.h
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if_bridge.h bridge: vlan: Allow setting VLAN neighbor suppression state 2023-04-21 08:25:50 +01:00
if_cablemodem.h
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if_eql.h
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if_ether.h can: canxl: update CAN infrastructure for CAN XL frames 2022-09-15 09:08:09 +02:00
if_fc.h
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if_fddi.h
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if_hippi.h
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if_infiniband.h
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if_link.h bridge: Allow setting per-{Port, VLAN} neighbor suppression state 2023-04-21 08:25:50 +01:00
if_ltalk.h
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if_macsec.h net: macsec: Expose MACSEC_SALT_LEN definition to user space 2022-08-18 20:37:35 -07:00
if_packet.h net/packet: support mergeable feature of virtio 2023-04-21 12:01:58 +01:00
if_phonet.h
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if_plip.h
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if_ppp.h
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if_pppol2tp.h
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if_pppox.h
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if_slip.h
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if_team.h
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if_tun.h uapi/linux/if_tun.h: Added new offload types for USO4/6. 2022-12-12 09:29:56 +00:00
if_tunnel.h
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if_vlan.h
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if_x25.h
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if_xdp.h
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ife.h
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igmp.h
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ila.h
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in.h ipv{4,6}/raw: fix output xfrm lookup wrt protocol 2023-05-23 15:38:59 +02:00
in6.h
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in_route.h
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inet_diag.h
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inotify.h
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input-event-codes.h HID: add mapping for camera access keys 2022-11-22 17:50:36 -08:00
input.h Input updates for v5.19-rc6 2022-07-17 07:52:46 -07:00
io_uring.h io_uring: add support for multishot timeouts 2023-04-18 19:38:36 -06:00
ioam6.h ipv6: ioam: Replace 0-length array with flexible array 2023-01-06 19:22:53 -08:00
ioam6_genl.h
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ioam6_iptunnel.h
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ioctl.h
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iommu.h
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iommufd.h iommufd: vfio container FD ioctl compatibility 2022-11-30 20:16:49 -04:00
ioprio.h
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ip.h uapi: add missing ip/ipv6 header dependencies for linux/stddef.h 2023-02-06 09:01:00 +00:00
ip6_tunnel.h
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ip_vs.h
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ipc.h
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ipmi.h
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ipmi_bmc.h
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ipmi_msgdefs.h
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ipmi_ssif_bmc.h ipmi: ssif_bmc: Add SSIF BMC driver 2022-10-17 09:51:26 -05:00
ipsec.h
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ipv6.h uapi: net: ipv6: Replace fake flex-array with flex-array member 2023-03-30 14:06:56 -06:00
ipv6_route.h
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irqnr.h
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iso_fs.h
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isst_if.h platform/x86: ISST: Add SST-TF support via TPMI 2023-03-16 15:18:02 +01:00
ivtv.h
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ivtvfb.h
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jffs2.h
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joystick.h
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kcm.h
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kcmp.h
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kcov.h
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kd.h VT: Add KD_FONT_OP_SET/GET_TALL operations 2023-01-19 16:28:57 +01:00
kdev_t.h
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kernel-page-flags.h
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kernel.h
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kernelcapi.h
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kexec.h
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keyboard.h
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keyctl.h
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kfd_ioctl.h drm/amdkfd: Implement DMA buf fd export from KFD 2023-02-28 14:30:00 -05:00
kfd_sysfs.h
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kvm.h KVM/arm64 updates for 6.4 2023-04-26 15:46:52 -04:00
kvm_para.h
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l2tp.h uapi: move IPPROTO_L2TP to in.h 2022-09-20 09:13:38 +02:00
landlock.h landlock: Clarify documentation for the LANDLOCK_ACCESS_FS_REFER right 2023-02-21 18:15:59 +01:00
libc-compat.h
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limits.h
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lirc.h
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llc.h
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loadpin.h
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loop.h
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lp.h
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lwtunnel.h xfrm: lwtunnel: add lwtunnel support for xfrm interfaces in collect_md mode 2022-08-29 10:44:08 +02:00
magic.h mm: Convert all PageMovable users to movable_operations 2022-08-02 12:34:03 -04:00
major.h
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map_to_7segment.h
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map_to_14segment.h
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matroxfb.h
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max2175.h
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mctp.h
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mdio.h net: phy: add genphy_c45_ethtool_get/set_eee() support 2023-02-13 11:12:31 +00:00
media-bus-format.h drm-misc-next for v6.3: 2023-01-04 14:59:25 +01:00
media.h
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mei.h mei: Move uuid.h to the MEI namespace 2023-03-23 17:25:46 +01:00
mei_uuid.h mei: Move uuid.h to the MEI namespace 2023-03-23 17:25:46 +01:00
membarrier.h sched/membarrier: Introduce MEMBARRIER_CMD_GET_REGISTRATIONS 2023-01-07 11:29:29 +01:00
memfd.h mm/memfd: add MFD_NOEXEC_SEAL and MFD_EXEC 2023-01-18 17:12:37 -08:00
mempolicy.h
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mii.h
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minix_fs.h
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mman.h cachestat: implement cachestat syscall 2023-06-09 16:25:16 -07:00
mmtimer.h
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module.h
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mount.h
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mpls.h
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mpls_iptunnel.h
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mptcp.h mptcp: add pm listener events 2022-12-01 20:06:06 -08:00
mqueue.h
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mroute.h
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mroute6.h
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mrp_bridge.h
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msdos_fs.h
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msg.h
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mtio.h
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nbd-netlink.h
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nbd.h uapi nbd: add cookie alias to handle 2023-04-27 19:15:11 -06:00
ncsi.h
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ndctl.h
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neighbour.h bridge: Add MAC Authentication Bypass (MAB) support 2022-11-03 20:46:32 -07:00
net.h
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net_dropmon.h
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net_namespace.h
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net_tstamp.h net_tstamp: add SOF_TIMESTAMPING_OPT_ID_TCP 2022-12-08 19:49:21 -08:00
netconf.h
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netdev.h ynl: broaden the license even more 2023-03-16 21:20:32 -07:00
netdevice.h
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netfilter.h netfilter: remove NFPROTO_DECNET 2022-09-07 16:46:03 +02:00
netfilter_arp.h
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netfilter_bridge.h
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netfilter_ipv4.h
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netfilter_ipv6.h
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netlink.h netlink: remove the flex array from struct nlmsghdr 2022-11-18 18:36:54 -08:00
netlink_diag.h
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netrom.h
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nexthop.h
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nfc.h
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nfs.h
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nfs2.h
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nfs3.h
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nfs4.h
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nfs4_mount.h
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nfs_fs.h
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nfs_idmap.h
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nfs_mount.h
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nfsacl.h
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nilfs2_api.h
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nilfs2_ondisk.h
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nitro_enclaves.h
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nl80211-vnd-intel.h
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nl80211.h wifi: nl80211: support advertising S1G capabilities 2023-03-30 12:02:59 +02:00
nsfs.h
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nubus.h
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nvme_ioctl.h
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nvram.h
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omap3isp.h
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omapfb.h
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oom.h
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openat2.h
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openvswitch.h net: openvswitch: Add support to count upcall packets 2022-12-09 10:43:46 +00:00
packet_diag.h
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param.h
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parport.h ata: parport_pc: add 16-bit and 8-bit fast EPP transfer flags 2023-03-23 12:22:19 +09:00
patchkey.h
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pci.h
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pci_regs.h cxl: add RAS status unmasking for CXL 2023-02-14 14:12:54 -08:00
pcitest.h
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perf_event.h perf: Add perf_event_attr::config3 2023-02-07 11:52:00 +00:00
personality.h
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pfkeyv2.h
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pfrut.h
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pg.h
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phantom.h
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phonet.h
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pidfd.h
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pkt_cls.h net/sched: flower: Add L2TPv3 filter 2022-09-20 09:13:38 +02:00
pkt_sched.h net/sched: taprio: allow per-TC user input of FP adminStatus 2023-04-13 22:22:10 -07:00
pktcdvd.h pktcdvd: Remove CONFIG_CDROM_PKTCDVD_WCACHE from uapi header 2023-03-10 21:05:16 +01:00
pmu.h
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poll.h
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posix_acl.h
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posix_acl_xattr.h
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posix_types.h
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ppdev.h
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ppp-comp.h
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ppp-ioctl.h
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ppp_defs.h
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pps.h
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pr.h block: Add error codes for common PR failures 2022-12-01 03:22:20 +00:00
prctl.h mm: add new api to enable ksm per process 2023-04-21 14:52:03 -07:00
psample.h
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psci.h firmware/psci: Fix MEM_PROTECT_RANGE function numbers 2023-01-06 17:12:39 +00:00
psp-sev.h crypto: ccp - Name -1 return value as SEV_RET_NO_FW_CALL 2023-03-21 11:37:32 +01:00
ptp_clock.h
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ptrace.h ptrace: Provide set/get interface for syscall user dispatch 2023-04-16 14:23:07 +02:00
qemu_fw_cfg.h
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qnx4_fs.h
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qnxtypes.h
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qrtr.h
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quota.h
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radeonfb.h
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random.h
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rds.h
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reboot.h
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reiserfs_fs.h
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reiserfs_xattr.h
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remoteproc_cdev.h
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resource.h
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rfkill.h
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rio_cm_cdev.h
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rio_mport_cdev.h
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rkisp1-config.h media: rockchip: rkisp1: Define macros for DPCC configurations in UAPI 2022-09-24 08:31:54 +02:00
romfs_fs.h
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rose.h
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route.h
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rpl.h net: ipv6: rpl_iptunnel: Replace 0-length arrays with flexible arrays 2023-01-06 19:28:01 -08:00
rpl_iptunnel.h
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rpmsg.h
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rpmsg_types.h
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rseq.h rseq: Extend struct rseq with per-memory-map concurrency ID 2022-12-27 12:52:12 +01:00
rtc.h
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rtnetlink.h net/sched: act_api: add specific EXT_WARN_MSG for tc action 2023-03-16 21:25:45 -07:00
rxrpc.h
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scc.h
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sched.h
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scif_ioctl.h
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screen_info.h
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sctp.h sctp: add weighted fair queueing stream scheduler 2023-03-09 11:31:44 +01:00
seccomp.h
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securebits.h
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sed-opal.h sed-opal: geometry feature reporting command 2023-04-19 14:07:13 -06:00
seg6.h
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seg6_genl.h
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seg6_hmac.h
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seg6_iptunnel.h Networking changes for 6.0. 2022-08-03 16:29:08 -07:00
seg6_local.h seg6: add NEXT-C-SID support for SRv6 End behavior 2022-09-20 12:33:22 +02:00
selinux_netlink.h
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sem.h
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serial.h serial: Convert serial_rs485 to kernel doc 2022-11-03 03:43:05 +01:00
serial_core.h serial: 8250_pci1xxxx: Add driver for quad-uart support 2023-02-08 13:10:15 +01:00
serial_reg.h serial: 8250: Define IIR 64 byte bit & cleanup related code 2023-01-19 15:01:20 +01:00
serio.h
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sev-guest.h x86/sev: Change snp_guest_issue_request()'s fw_err argument 2023-03-21 15:43:19 +01:00
shm.h
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signal.h
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signalfd.h
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smc.h net/smc: Extend SMC-R link group netlink attribute 2022-07-18 11:19:17 +01:00
smc_diag.h
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smiapp.h
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snmp.h icmp: Add counters for rate limits 2023-01-26 10:52:18 +01:00
sock_diag.h
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socket.h
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sockios.h
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sonet.h
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sonypi.h
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sound.h
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soundcard.h
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stat.h statx: add direct I/O alignment information 2022-09-11 19:47:04 -05:00
stddef.h
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stm.h
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string.h
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suspend_ioctls.h
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swab.h include/uapi/linux/swab: Fix potentially missing __always_inline 2022-11-09 14:06:51 +01:00
switchtec_ioctl.h
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sync_file.h dma-buf/sync_file: Surface sync-file uABI 2023-03-28 13:39:02 -07:00
synclink.h
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sysctl.h
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sysinfo.h
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target_core_user.h scsi: target: uapi: Replace fake flex-array with flexible-array member 2023-03-24 16:59:09 -04:00
taskstats.h delayacct: track delays from IRQ/SOFTIRQ 2023-04-18 16:39:34 -07:00
tcp.h tcp: add rcv_wnd and plb_rehash to TCP_INFO 2022-10-28 10:47:42 +01:00
tcp_metrics.h
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tdx-guest.h virt: Add TDX guest driver 2022-11-17 11:04:23 -08:00
tee.h
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termios.h
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thermal.h
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time.h
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time_types.h
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timerfd.h
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times.h
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timex.h
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tiocl.h
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tipc.h
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tipc_config.h
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tipc_netlink.h
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tipc_sockets_diag.h
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tls.h net: tls: Add ARIA-GCM algorithm 2022-09-27 17:29:09 -07:00
toshiba.h
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tty.h
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tty_flags.h
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types.h
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ublk_cmd.h block: ublk: switch to ioctl command encoding 2023-04-18 20:13:30 -06:00
udf_fs_i.h
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udmabuf.h
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udp.h
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uhid.h
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uinput.h
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uio.h
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uleds.h
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ultrasound.h
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um_timetravel.h
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un.h
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unistd.h
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unix_diag.h
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usbdevice_fs.h
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usbip.h usbip: add USBIP_URB_* URB transfer flags 2022-08-31 09:07:53 +02:00
user_events.h tracing/user_events: Align structs with tabs for readability 2023-03-29 06:52:09 -04:00
userfaultfd.h mm: userfaultfd: add UFFDIO_CONTINUE_MODE_WP to install WP PTEs 2023-04-05 19:42:48 -07:00
userio.h
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utime.h
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utsname.h
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uuid.h mei: Move uuid.h to the MEI namespace 2023-03-23 17:25:46 +01:00
uvcvideo.h media: uvcvideo: Silence memcpy() run-time false positive warnings 2023-01-15 23:45:15 +02:00
v4l2-common.h headers: Remove some left-over license text in include/uapi/linux/v4l2-* 2022-12-07 17:58:46 +01:00
v4l2-controls.h media: meye: remove this deprecated driver 2023-01-22 09:54:31 +01:00
v4l2-dv-timings.h headers: Remove some left-over license text in include/uapi/linux/v4l2-* 2022-12-07 17:58:46 +01:00
v4l2-mediabus.h headers: Remove some left-over license text in include/uapi/linux/v4l2-* 2022-12-07 17:58:46 +01:00
v4l2-subdev.h media: v4l2-subdev: Add new ioctl for client capabilities 2023-04-15 08:58:41 +01:00
vbox_err.h
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vbox_vmmdev_types.h
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vboxguest.h
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vdpa.h vdpa: merge functionally duplicated dev_features attributes 2022-12-28 05:09:46 -05:00
vduse.h vduse: Support querying information of IOVA regions 2022-08-11 04:26:08 -04:00
veth.h
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vfio.h vfio/type1: exclude mdevs from VFIO_UPDATE_VADDR 2023-02-09 11:39:14 -07:00
vfio_ccw.h
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vfio_zdev.h
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vhost.h vhost-vdpa: uAPI to resume the device 2023-02-20 19:26:56 -05:00
vhost_types.h vhost-vdpa: Introduce RESUME backend feature bit 2023-02-20 19:26:56 -05:00
videodev2.h media: Add ABGR64_12 video format 2023-04-15 09:11:30 +01:00
virtio_9p.h
…
virtio_balloon.h
…
virtio_blk.h virtio-blk: fix to match virtio spec 2023-04-04 11:01:57 -04:00
virtio_bt.h virtio_bt: Fix alignment in configuration struct 2022-12-12 14:19:23 -08:00
virtio_config.h virtio: add VIRTIO_F_NOTIFICATION_DATA feature support 2023-04-21 03:02:35 -04:00
virtio_console.h
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virtio_crypto.h
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virtio_fs.h
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virtio_gpio.h
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virtio_gpu.h
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virtio_i2c.h
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virtio_ids.h
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virtio_input.h
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virtio_iommu.h
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virtio_mem.h
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virtio_mmio.h
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virtio_net.h net: virtio_net: implement exact header length guest feature 2023-03-13 16:32:16 -07:00
virtio_pci.h virtio_pci: struct virtio_pci_common_cfg add queue_reset 2022-08-11 04:06:40 -04:00
virtio_pcidev.h
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virtio_pmem.h
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virtio_ring.h virtio: kerneldocs fixes and enhancements 2022-08-16 01:40:24 -04:00
virtio_rng.h
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virtio_scmi.h
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virtio_scsi.h
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virtio_snd.h
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virtio_types.h
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virtio_vsock.h
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vm_sockets.h
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vm_sockets_diag.h
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vmcore.h
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vsockmon.h
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vt.h
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vtpm_proxy.h
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wait.h
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watch_queue.h
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watchdog.h
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wireguard.h
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wireless.h
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wmi.h
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wwan.h
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x25.h
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xattr.h
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xdp_diag.h
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xfrm.h xfrm: add new packet offload flag 2022-12-05 10:30:47 +01:00
xilinx-v4l2-controls.h
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zorro.h
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zorro_ids.h
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