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iomap: use GFP_NOWAIT when application for iomap_dio_simple allocations

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For non-blocking iocbs we should avoid blocking allocation where
possible, so switch to a GFP_NOWAIT allocation here.

Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Fengnan Chang <changfengnan@bytedance.com>
Reviewed-by: Joanne Koong <joannelkoong@gmail.com>
Signed-off-by: Joanne Koong <joannelkoong@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20260729192737.3190206-5-joannelkoong@gmail.com
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
This commit is contained in:
Christoph Hellwig
2026-07-29 12:27:19 -07:00
committed by Christian Brauner
parent 335d4b6201
commit eecfab484d
1 changed files with 6 additions and 1 deletions
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7
fs/iomap/direct-io.c
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@@ -986,6 +986,7 @@ static void iomap_dio_simple_end_io(struct bio *bio)
ssize_t __iomap_dio_read_simple(struct kiocb *iocb, struct iov_iter *iter,
struct iomap_iter *iomi)
{
gfp_t gfp = (iomi->flags & IOMAP_NOWAIT) ? GFP_NOWAIT : GFP_KERNEL;
struct iomap_dio_simple *sr;
unsigned int alignment;
struct bio *bio;
@@ -1015,7 +1016,11 @@ ssize_t __iomap_dio_read_simple(struct kiocb *iocb, struct iov_iter *iter,
bio = bio_alloc_bioset(iomi->iomap.bdev,
bio_iov_vecs_to_alloc(iter, BIO_MAX_VECS),
REQ_OP_READ, GFP_KERNEL, &iomap_dio_simple_pool);
REQ_OP_READ, gfp, &iomap_dio_simple_pool);
if (!bio) {
ret = -EAGAIN;
goto out_dio_end;
}
sr = container_of(bio, struct iomap_dio_simple, bio);
sr->iocb = iocb;
sr->dio_flags = 0;