The marquee feature for this release is that the limit on the
maximum rsize and wsize has been raised to 4MB. The default remains
at 1MB, but risk-seeking administrators now have the ability to try
larger I/O sizes with NFS clients that support them. Eventually the
default setting will be increased when we have confidence that this
change will not have negative impact.
With v6.16, NFSD now has its own debugfs file system where we can
add experimental features and make them available outside of our
development community without impacting production deployments. The
first experimental setting added is one that makes all NFS READ
operations use vfs_iter_read() instead of the NFSD splice actor. The
plan is to eventually retire the splice actor, as that will enable a
number of new capabilities such as the use of struct bio_vec from the
top to the bottom of the NFSD stack.
Jeff Layton contributed a number of observability improvements. The
use of dprintk() in a number of high-traffic code paths has been
replaced with static trace points.
This release sees the continuation of efforts to harden the NFSv4.2
COPY operation. Soon, the restriction on async COPY operations can
be lifted.
Many thanks to the contributors, reviewers, testers, and bug
reporters who participated during the v6.16 development cycle.
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Merge tag 'nfsd-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux
Pull nfsd updates from Chuck Lever:
"The marquee feature for this release is that the limit on the maximum
rsize and wsize has been raised to 4MB. The default remains at 1MB,
but risk-seeking administrators now have the ability to try larger I/O
sizes with NFS clients that support them. Eventually the default
setting will be increased when we have confidence that this change
will not have negative impact.
With v6.16, NFSD now has its own debugfs file system where we can add
experimental features and make them available outside of our
development community without impacting production deployments. The
first experimental setting added is one that makes all NFS READ
operations use vfs_iter_read() instead of the NFSD splice actor. The
plan is to eventually retire the splice actor, as that will enable a
number of new capabilities such as the use of struct bio_vec from the
top to the bottom of the NFSD stack.
Jeff Layton contributed a number of observability improvements. The
use of dprintk() in a number of high-traffic code paths has been
replaced with static trace points.
This release sees the continuation of efforts to harden the NFSv4.2
COPY operation. Soon, the restriction on async COPY operations can be
lifted.
Many thanks to the contributors, reviewers, testers, and bug reporters
who participated during the v6.16 development cycle"
* tag 'nfsd-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux: (60 commits)
xdrgen: Fix code generated for counted arrays
SUNRPC: Bump the maximum payload size for the server
NFSD: Add a "default" block size
NFSD: Remove NFSSVC_MAXBLKSIZE_V2 macro
NFSD: Remove NFSD_BUFSIZE
sunrpc: Remove the RPCSVC_MAXPAGES macro
svcrdma: Adjust the number of entries in svc_rdma_send_ctxt::sc_pages
svcrdma: Adjust the number of entries in svc_rdma_recv_ctxt::rc_pages
sunrpc: Adjust size of socket's receive page array dynamically
SUNRPC: Remove svc_rqst :: rq_vec
SUNRPC: Remove svc_fill_write_vector()
NFSD: Use rqstp->rq_bvec in nfsd_iter_write()
SUNRPC: Export xdr_buf_to_bvec()
NFSD: De-duplicate the svc_fill_write_vector() call sites
NFSD: Use rqstp->rq_bvec in nfsd_iter_read()
sunrpc: Replace the rq_bvec array with dynamically-allocated memory
sunrpc: Replace the rq_pages array with dynamically-allocated memory
sunrpc: Remove backchannel check in svc_init_buffer()
sunrpc: Add a helper to derive maxpages from sv_max_mesg
svcrdma: Reduce the number of rdma_rw contexts per-QP
...
2c26b68cd5