From: Pavel Begunkov Date: Wed, 10 Apr 2024 01:26:52 +0000 (+0100) Subject: io_uring: remove extra SQPOLL overflow flush X-Git-Tag: v6.10-rc1~220^2~32 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e45ec969d17acb0a1bea78c9c6c4403fceccd599;p=thirdparty%2Fkernel%2Fstable.git io_uring: remove extra SQPOLL overflow flush c1edbf5f081be ("io_uring: flag SQPOLL busy condition to userspace") added an extra overflowed CQE flush in the SQPOLL submission path due to backpressure, which was later removed. Remove the flush and let io_cqring_wait() / iopoll handle it. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/2a83b0724ca6ca9d16c7d79a51b77c81876b2e39.1712708261.git.asml.silence@gmail.com Signed-off-by: Jens Axboe --- diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index 454d1d7695f6d..885f701983d7a 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -3238,8 +3238,6 @@ SYSCALL_DEFINE6(io_uring_enter, unsigned int, fd, u32, to_submit, */ ret = 0; if (ctx->flags & IORING_SETUP_SQPOLL) { - io_cqring_overflow_flush(ctx); - if (unlikely(ctx->sq_data->thread == NULL)) { ret = -EOWNERDEAD; goto out;