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(parent: d732447) | patch
io_uring: add likely/unlikely in io_get_sqring()
authorPavel Begunkov <asml.silence@gmail.com>
Thu, 21 Nov 2019 18:24:56 +0000 (21:24 +0300)
committerJens Axboe <axboe@kernel.dk>
Tue, 26 Nov 2019 02:56:10 +0000 (19:56 -0700)
commit9835d6fafba58e6d9386a6d5af800789bdb52e5b
tree1ff0d914ab1d5b612ff899e987eb16d7ffd3cfcatree | snapshot
parentd732447fed7d6b4c22907f630cd25d574bae5276commit | diff
io_uring: add likely/unlikely in io_get_sqring()

The number of SQEs to submit is specified by a user, so io_get_sqring()
in most of the cases succeeds. Hint compilers about that.

Checking ASM genereted by gcc 9.2.0 for x64, there is one branch
misprediction.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
fs/io_uring.c diff | blob | history
This is a test repository.
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