diff options
| author | Alexandre Negrel <alexandre@negrel.dev> | 2025-12-30 19:57:28 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2025-12-30 18:49:31 -0700 |
| commit | fc5ff2500976cd2710a7acecffd12d95ee4f98fc (patch) | |
| tree | ee68e983d69f4b10ac8c7b36e65992b76104c8db | |
| parent | b14fad555302a2104948feaff70503b64c80ac01 (diff) | |
io_uring: use GFP_NOWAIT for overflow CQEs on legacy rings
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>
| -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 6cb24cdf8e68..709943fedaf4 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -864,7 +864,7 @@ 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); } |