block: split bio_alloc_bioset more clearly into a fast and slowpath

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bio_alloc_bioset tries non-waiting slab allocations first for the bio and
bvec array, but does so in a somewhat convoluted way.

Restructure the function so that it first open codes these slab
allocations, and then falls back to the mempools with the original
gfp mask.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> -ck
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://patch.msgid.link/20260316161144.1607877-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Christoph Hellwig 2026-03-16 17:11:30 +01:00 • committed by Jens Axboe

parent fed406f3c1

commit b520c4eef8

2 changed files with 74 additions and 109 deletions

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190

block/bio.c

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3

include/linux/bio.h

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