| commit | 87fd697abf36319b7587ddfb43b8d1234cfd1dbd | [log] [tgz] |
|---|---|---|
| author | Nobel Barakat <[email protected]> | Thu Jun 02 22:28:58 2022 +0000 |
| committer | COS Cherry Picker <[email protected]> | Mon Jun 06 12:18:37 2022 -0700 |
| tree | 0840707fbce41e62db7d3992ab365f23c06b7120 | |
| parent | 557102e3ede7dab854ae1da534a5daaf3dd8eb5d [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]>