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| author | Pavel Begunkov <asml.silence@gmail.com> | 2021-10-10 01:14:41 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-10-19 14:49:55 +0300 |
| commit | ab409402478462b5da007bfc46d165587c3adfc3 (patch) | |
| tree | 0f32078a415091abc25f0c091aa902f9e97acde8 /scripts | |
| parent | a46be971edb69fe4b1dcc4359c3ddf9127629dab (diff) | |
| download | linux-ab409402478462b5da007bfc46d165587c3adfc3.tar.xz | |
io_uring: optimise rsrc referencing
Apparently, percpu_ref_put/get() are expensive enough if done per
request, get them in a batch and cache on the submission side to avoid
getting it over and over again. Also, if we're completing under
uring_lock, return refs back into the cache instead of
perfcpu_ref_put(). Pretty similar to how we do tctx->cached_refs
accounting, but fall back to normal putting when we already changed a
rsrc node by the time of free.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/b40d8c5bc77d3c9550df8a319117a374ac85f8f4.1633817310.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'scripts')
0 files changed, 0 insertions, 0 deletions