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(parent: 62f51bf) | patch
io_uring: optimise io_uring_enter()
authorPavel Begunkov <asml.silence@gmail.com>
Fri, 19 Mar 2021 17:22:30 +0000 (17:22 +0000)
committerJens Axboe <axboe@kernel.dk>
Thu, 25 Mar 2021 16:24:21 +0000 (10:24 -0600)
commit2e180b8f08dcf09dff131f0c7313f219476dd48f
tree7b2ea1a141376ed4306f0296288bb5b928a0c0bbtree
parent62f51bf9e2b032601a6101f724704f4ab253184bcommit | diff
io_uring: optimise io_uring_enter()

Add unlikely annotations, because my compiler pretty much mispredicts
every first check, and apart jumping around in the fast path, it also
generates extra instructions, like in advance setting ret value.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
fs/io_uring.c diff | blob | blame | history
Linux 6.x block layer and io_uring tree(s)