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| author |   Pavel Begunkov <asml.silence@gmail.com> | 2024-11-29 13:34:36 +0000 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2024-12-23 08:17:16 -0700 |
| commit | 78fda3d056417ccb9921663383b12f771aa0dd43 (patch) | |
| tree | b0ce495a29357ac062730cfb0426d15beec39eaf /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | io_uring: use region api for CQ (diff) | |
| download | linux-rng-78fda3d056417ccb9921663383b12f771aa0dd43.tar.xz linux-rng-78fda3d056417ccb9921663383b12f771aa0dd43.zip | |
io_uring/kbuf: use mmap_lock to sync with mmap
A preparation / cleanup patch simplifying the buf ring - mmap
synchronisation. Instead of relying on RCU, which is trickier, do it by
grabbing the mmap_lock when when anyone tries to publish or remove a
registered buffer to / from ->io_bl_xa.
Modifications of the xarray should always be protected by both
->uring_lock and ->mmap_lock, while lookups should hold either of them.
While a struct io_buffer_list is in the xarray, the mmap related fields
like ->flags and ->buf_pages should stay stable.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/af13bde56ee1a26bcaefaa9aad37a9ea318a590e.1732886067.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions