| commit | f773ec6a1f0a146718c68871adeae9707e0fee63 | [log] [tgz] |
|---|---|---|
| author | Nobel Barakat <[email protected]> | Thu Jun 02 22:28:58 2022 +0000 |
| committer | COS Cherry Picker <[email protected]> | Mon Jun 06 16:31:39 2022 -0700 |
| tree | f4b818fd53e31bb9aeaf221c4b27056cef8859d6 | |
| parent | c6a9157c67a4613be6b5dc355cc796b1c258f1be [diff] |
nfsd: Replace use of rwsem with errseq_t The nfsd_file nf_rwsem is currently being used to separate file write and commit instances to ensure that we catch errors and apply them to the correct write/commit. We can improve scalability at the expense of a little accuracy (some extra false positives) by replacing the nf_rwsem with more careful use of the errseq_t mechanism to track errors across the different operations. BUG=b/219091171 TEST=presubmit RELEASE_NOTE=Fixed a Linux kernel write IOPS regression with nfsd. cos-patch: bug Signed-off-by: Trond Myklebust <[email protected]> Signed-off-by: Chuck Lever <[email protected]> Change-Id: I481a23eccfe85152c9144184b2e0e71ed27a264d Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/33361 Main-Branch-Verified: Cusky Presubmit Bot <[email protected]> Tested-by: Cusky Presubmit Bot <[email protected]> Reviewed-by: Oleksandr Tymoshenko <[email protected]> (cherry picked from commit 36b67b8b4132f00582426e5e4f409ff0f962e9c5) Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/33440