diff options
| author | Alexandre Negrel <alexandre@negrel.dev> | 2025-12-30 19:57:28 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-02-11 13:41:47 +0100 |
| commit | 2bb9c8a77df5074fe19f3774f5d0a56dbda824cc (patch) | |
| tree | d0802a2a944bbe23c15eec452c45f19e8d797fff /io_uring/io_uring.c | |
| parent | 4665e52bde3b1f8f442895ce7d88fa62a43e48c4 (diff) | |
io_uring: use GFP_NOWAIT for overflow CQEs on legacy rings
[ Upstream commit fc5ff2500976cd2710a7acecffd12d95ee4f98fc ]
Allocate the overflowing CQE with GFP_NOWAIT instead of GFP_ATOMIC. This
changes causes allocations to fail earlier in out-of-memory situations,
rather than being deferred. Using GFP_ATOMIC allows a process to exceed
memory limits.
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=220794
Signed-off-by: Alexandre Negrel <alexandre@negrel.dev>
Link: https://lore.kernel.org/io-uring/20251229201933.515797-1-alexandre@negrel.dev/
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'io_uring/io_uring.c')
| -rw-r--r-- | io_uring/io_uring.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index e97c495c1806..104192bcc8e4 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -897,7 +897,7 @@ static __cold bool io_cqe_overflow_locked(struct io_ring_ctx *ctx, { struct io_overflow_cqe *ocqe; - ocqe = io_alloc_ocqe(ctx, cqe, big_cqe, GFP_ATOMIC); + ocqe = io_alloc_ocqe(ctx, cqe, big_cqe, GFP_NOWAIT); return io_cqring_add_overflow(ctx, ocqe); } |