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Jakub Kicinski 6f5dacf88a Revert "net/mlx5e: Update and set Xon/Xoff upon MTU set" 
This reverts commit ceddedc969.

Commit in question breaks the mapping of PGs to pools for some SKUs.
Specifically multi-host NICs seem to be shipped with a custom buffer
configuration which maps the lossy PG to pool 4. But the bad commit
overrides this with pool 0 which does not have sufficient buffer space
reserved. Resulting in ~40% packet loss. The commit also breaks BMC /
OOB connection completely (100% packet loss).

Revert, similarly to commit 3fbfe251cc ("Revert "net/mlx5e: Update and
set Xon/Xoff upon port speed set""). The breakage is exactly the same,
the only difference is that quoted commit would break the NIC immediately
on boot, and the currently reverted commit only when MTU is changed.

Note: "good" kernels do not restore the configuration, so downgrade isn't
enough to recover machines. A NIC power cycle seems to be necessary to
return to a healthy state (or overriding the relevant registers using
a custom patch).

Fixes: ceddedc969 ("net/mlx5e: Update and set Xon/Xoff upon MTU set")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20250929181529.1848157-1-kuba@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
 		2025-09-30 16:32:24 +02:00
Documentation Documentation: net: add flow control guide and document ethtool API 2025-09-30 09:48:31 +02:00
LICENSES LICENSES: Replace the obsolete address of the FSF in the GFDL-1.2 2025-07-24 11:15:39 +02:00
arch Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-09-25 11:00:59 -07:00
block vfs-6.17-rc6.fixes 2025-09-08 07:53:01 -07:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto This push fixes a NULL pointer dereference in ccp and a couple of 2025-09-19 09:58:21 -07:00
drivers Revert "net/mlx5e: Update and set Xon/Xoff upon MTU set" 2025-09-30 16:32:24 +02:00
fs for-6.17-rc7-tag 2025-09-24 11:09:09 -07:00
include net: add NUMA awareness to skb_attempt_defer_free() 2025-09-30 15:45:53 +02:00
init 20 hotfixes. 15 are cc:stable and the remainder address post-6.16 issues 2025-09-10 21:19:34 -07:00
io_uring Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-09-25 11:00:59 -07:00
ipc vfs-6.17-rc1.mmap_prepare 2025-07-28 13:43:25 -07:00
kernel Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-09-25 11:00:59 -07:00
lib hardening fixes for v6.17-rc4 2025-08-31 08:56:45 -07:00
mm Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-09-18 11:26:06 -07:00
net net: add NUMA awareness to skb_attempt_defer_free() 2025-09-30 15:45:53 +02:00
rust Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-09-18 11:26:06 -07:00
samples 15 hotfixes. 11 are cc:stable and the remainder address post-6.16 issues 2025-09-17 21:34:26 -07:00
scripts scripts/coccinelle: Find PTR_ERR() to %pe candidates 2025-09-26 12:26:41 -07:00
security + Features 2025-08-04 08:17:28 -07:00
sound ALSA: hda/realtek: Fix mute led for HP Laptop 15-dw4xx 2025-09-18 21:10:05 +02:00
tools selftests: drv-net: psp: add tests for destroying devices 2025-09-30 15:17:22 +02:00
usr usr/include: openrisc: don't HDRTEST bpf_perf_event.h 2025-05-12 15:03:17 +09:00
virt Merge tag 'kvm-x86-no_assignment-6.17' of https://github.com/kvm-x86/linux into HEAD 2025-07-29 08:36:42 -04:00
.clang-format Linux 6.15-rc5 2025-05-06 16:39:25 +10:00
.clippy.toml rust: clean Rust 1.88.0's warning about `clippy::disallowed_macros` configuration 2025-05-07 00:11:47 +02:00
.cocciconfig
…
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore MAINTAINERS: remove Alyssa Rosenzweig 2025-09-18 21:17:31 +02:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore gitignore: allow .pylintrc to be tracked 2025-07-02 17:10:04 -06:00
.mailmap linux-can-next-for-6.18-20250924 2025-09-26 14:46:59 -07:00
.pylintrc docs: add a .pylintrc file with sys path for docs scripts 2025-04-09 12:10:33 -06:00
.rustfmt.toml
…
COPYING
…
CREDITS MAINTAINERS: retire Boris from TLS maintainers 2025-08-26 17:36:01 -07:00
Kbuild drm: ensure drm headers are self-contained and pass kernel-doc 2025-02-12 10:44:43 +02:00
Kconfig io_uring: Rename KConfig to Kconfig 2025-02-19 14:53:27 -07:00
MAINTAINERS MAINTAINERS: add a sub-entry for the Qualcomm bluetooth driver 2025-09-27 11:37:00 -04:00
Makefile Linux 6.17-rc7 2025-09-21 15:08:52 -07:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.