From: Sasha Levin <[email protected]>
To: [email protected], [email protected]
Cc: Shakeel Butt <[email protected]>, Jens Axboe <[email protected]>,
Sasha Levin <[email protected]>,
[email protected]
Subject: [PATCH AUTOSEL 5.15 17/33] mm: io_uring: allow oom-killer from io_uring_setup
Date: Tue, 15 Feb 2022 10:28:15 -0500 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
From: Shakeel Butt <[email protected]>
[ Upstream commit 0a3f1e0beacf6cc8ae5f846b0641c1df476e83d6 ]
On an overcommitted system which is running multiple workloads of
varying priorities, it is preferred to trigger an oom-killer to kill a
low priority workload than to let the high priority workload receiving
ENOMEMs. On our memory overcommitted systems, we are seeing a lot of
ENOMEMs instead of oom-kills because io_uring_setup callchain is using
__GFP_NORETRY gfp flag which avoids the oom-killer. Let's remove it and
allow the oom-killer to kill a lower priority job.
Signed-off-by: Shakeel Butt <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jens Axboe <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
---
fs/io_uring.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 993913c585fbf..21fc8ce9405d3 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -8820,10 +8820,9 @@ static void io_mem_free(void *ptr)
static void *io_mem_alloc(size_t size)
{
- gfp_t gfp_flags = GFP_KERNEL | __GFP_ZERO | __GFP_NOWARN | __GFP_COMP |
- __GFP_NORETRY | __GFP_ACCOUNT;
+ gfp_t gfp = GFP_KERNEL_ACCOUNT | __GFP_ZERO | __GFP_NOWARN | __GFP_COMP;
- return (void *) __get_free_pages(gfp_flags, get_order(size));
+ return (void *) __get_free_pages(gfp, get_order(size));
}
static unsigned long rings_size(unsigned sq_entries, unsigned cq_entries,
--
2.34.1
parent reply other threads:[~2022-02-15 15:31 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <[email protected]>]
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