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block: only restrict bio allocation gfp mask asked to block

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If the caller is asking for a non-blocking allocation, we should not
further restrict the gfp mask, which just increases the likelihood
of failures.

Fixes: b520c4eef8 ("block: split bio_alloc_bioset more clearly into a fast and slowpath")
Reported-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Link: https://patch.msgid.link/20260415060813.807659-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2026-04-15 08:08:07 +02:00 committed by Jens Axboe
parent 19d32966e1
commit b5129bda5b
1 changed files with 2 additions and 1 deletions
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block/bio.c
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@ -544,6 +544,7 @@ struct bio *bio_alloc_bioset(struct block_device *bdev, unsigned short nr_vecs,
if (WARN_ON_ONCE(!mempool_initialized(&bs->bvec_pool) && nr_vecs > 0))
return NULL;
if (saved_gfp & __GFP_DIRECT_RECLAIM)
gfp = try_alloc_gfp(gfp);
if (bs->cache && nr_vecs <= BIO_INLINE_VECS) {
/*