diff options
| author | Jens Axboe <[email protected]> | 2021-11-12 00:32:53 +0000 |
|---|---|---|
| committer | Jens Axboe <[email protected]> | 2021-11-12 00:39:46 +0000 |
| commit | d3e3c102d107bb84251455a298cf475f24bab995 (patch) | |
| tree | b32b5498d47f554f2ebf09558834842b67185d69 /drivers/fpga/fpga-mgr.c | |
| parent | io_uring: honour zeroes as io-wq worker limits (diff) | |
| download | kernel-d3e3c102d107bb84251455a298cf475f24bab995.tar.gz kernel-d3e3c102d107bb84251455a298cf475f24bab995.zip | |
io-wq: serialize hash clear with wakeup
We need to ensure that we serialize the stalled and hash bits with the
wait_queue wait handler, or we could be racing with someone modifying
the hashed state after we find it busy, but before we then give up and
wait for it to be cleared. This can cause random delays or stalls when
handling buffered writes for many files, where some of these files cause
hash collisions between the worker threads.
Cc: [email protected]
Reported-by: Daniel Black <[email protected]>
Fixes: e941894eae31 ("io-wq: make buffered file write hashed work map per-ctx")
Signed-off-by: Jens Axboe <[email protected]>
Diffstat (limited to 'drivers/fpga/fpga-mgr.c')
0 files changed, 0 insertions, 0 deletions