From: Pavel Begunkov <[email protected]>
To: [email protected]
Cc: Jens Axboe <[email protected]>,
[email protected], yang lan <[email protected]>
Subject: [PATCH 1/1] io_uring: more graceful request alloc OOM
Date: Fri, 19 May 2023 15:05:14 +0100 [thread overview]
Message-ID: <3e79156a106e8b5b3646672656f738ba157957ef.1684505086.git.asml.silence@gmail.com> (raw)
It's ok for io_uring request allocation to fail, however there are
reports that it starts killing tasks instead of just returning back
to the userspace. Add __GFP_NORETRY, so it doesn't trigger OOM killer.
Cc: [email protected]
Fixes: 2b188cc1bb857 ("Add io_uring IO interface")
Reported-by: yang lan <[email protected]>
Signed-off-by: Pavel Begunkov <[email protected]>
---
io_uring/io_uring.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index dab09f568294..ad34a4320dab 100644
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -1073,7 +1073,7 @@ static void io_flush_cached_locked_reqs(struct io_ring_ctx *ctx,
__cold bool __io_alloc_req_refill(struct io_ring_ctx *ctx)
__must_hold(&ctx->uring_lock)
{
- gfp_t gfp = GFP_KERNEL | __GFP_NOWARN;
+ gfp_t gfp = GFP_KERNEL | __GFP_NOWARN | __GFP_NORETRY;
void *reqs[IO_REQ_ALLOC_BATCH];
int ret, i;
--
2.40.0
next reply other threads:[~2023-05-19 14:06 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-19 14:05 Pavel Begunkov [this message]
2023-05-20 1:57 ` [PATCH 1/1] io_uring: more graceful request alloc OOM Jens Axboe
2023-05-20 9:38 ` yang lan
2023-05-22 0:40 ` Pavel Begunkov
2023-05-22 7:55 ` yang lan
2023-05-23 12:08 ` Pavel Begunkov
2023-05-24 3:15 ` yang lan
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