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| author |   Pavel Begunkov <asml.silence@gmail.com> | 2021-09-24 21:59:57 +0100 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2021-10-19 05:49:53 -0600 |
| commit | 2a56a9bd64dbdff4fe5cbe00b20014da07694a78 (patch) | |
| tree | 8b88d171b8ba8e2fa791465b5c15400d6dd4d863 /tools/perf/scripts/python/stackcollapse.py | |
| parent | io_uring: deduplicate io_queue_sqe() call sites (diff) | |
| download | linux-dev-2a56a9bd64dbdff4fe5cbe00b20014da07694a78.tar.xz linux-dev-2a56a9bd64dbdff4fe5cbe00b20014da07694a78.zip | |
io_uring: remove drain_active check from hot path
req->ctx->active_drain is a bit too expensive, partially because of two
dereferences. Do a trick, if we see it set in io_init_req(), set
REQ_F_FORCE_ASYNC and it automatically goes through a slower path where
we can catch it. It's nearly free to do in io_init_req() because there
is already ->restricted check and it's in the same byte of a bitmask.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/d7e7ddc63c15e8a300833132abb3eb8fd3918aef.1632516769.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions