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io_uring/napi: refactor __io_napi_busy_loop()

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we don't need to set ->napi_prefer_busy_poll if we're not going to poll,
do the checks first and all polling preparation after.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/2ad7ede8cc7905328fc62e8c3805fdb11635ae0b.1723039801.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2024-08-07 15:18:11 +01:00 committed by Jens Axboe
parent a69307a554
commit 489b80060c
1 changed files with 4 additions and 3 deletions
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7
io_uring/napi.c
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@ -299,10 +299,11 @@ void __io_napi_adjust_timeout(struct io_ring_ctx *ctx, struct io_wait_queue *iow
*/
void __io_napi_busy_loop(struct io_ring_ctx *ctx, struct io_wait_queue *iowq)
{
iowq->napi_prefer_busy_poll = READ_ONCE(ctx->napi_prefer_busy_poll);
if (ctx->flags & IORING_SETUP_SQPOLL)
return;
if (!(ctx->flags & IORING_SETUP_SQPOLL))
io_napi_blocking_busy_loop(ctx, iowq);
iowq->napi_prefer_busy_poll = READ_ONCE(ctx->napi_prefer_busy_poll);
io_napi_blocking_busy_loop(ctx, iowq);
}
/*