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| author | Jens Axboe <axboe@kernel.dk> | 2022-09-02 10:40:11 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-09-02 13:03:33 -0600 |
| commit | 12c5b70c1897288ee6c841b5cc3ff4d27d511bd1 (patch) | |
| tree | ecd6638d302bb9d5104ac67c46df2d05f0fddda2 /block/bio.c | |
| parent | 16ede66973c84f890c03584f79158dd5b2d725f5 (diff) | |
| download | lwn-12c5b70c1897288ee6c841b5cc3ff4d27d511bd1.tar.gz lwn-12c5b70c1897288ee6c841b5cc3ff4d27d511bd1.zip | |
block: enable per-cpu bio caching for the fs bio set
This is useful for polled IO on a file, or for polled IO with the
io_uring passthrough mechanism. If bio allocations are done with
REQ_POLLED for those cases, then initializing the bio set with
BIOSET_PERCPU_CACHE enables the local per-cpu cache which eliminates
allocations (and frees) of bio structs when possible.
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/bio.c')
| -rw-r--r-- | block/bio.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/block/bio.c b/block/bio.c index 3d3a2678fea2..d3154d8beed7 100644 --- a/block/bio.c +++ b/block/bio.c @@ -1754,7 +1754,8 @@ static int __init init_bio(void) cpuhp_setup_state_multi(CPUHP_BIO_DEAD, "block/bio:dead", NULL, bio_cpu_dead); - if (bioset_init(&fs_bio_set, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS)) + if (bioset_init(&fs_bio_set, BIO_POOL_SIZE, 0, + BIOSET_NEED_BVECS | BIOSET_PERCPU_CACHE)) panic("bio: can't allocate bios\n"); if (bioset_integrity_create(&fs_bio_set, BIO_POOL_SIZE)) |