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authorJens Axboe <axboe@kernel.dk>2022-09-02 10:40:11 -0600
committerJens Axboe <axboe@kernel.dk>2022-09-02 13:03:33 -0600
commit12c5b70c1897288ee6c841b5cc3ff4d27d511bd1 (patch)
treeecd6638d302bb9d5104ac67c46df2d05f0fddda2 /block/bio.c
parent16ede66973c84f890c03584f79158dd5b2d725f5 (diff)
downloadlwn-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.c3
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))