From: Jens Axboe Date: Fri, 2 Sep 2022 16:40:11 +0000 (-0600) Subject: block: enable per-cpu bio caching for the fs bio set X-Git-Tag: v6.1~412^2~86 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=12c5b70c1897288ee6c841b5cc3ff4d27d511bd1;p=mirror_ubuntu-kernels.git 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 Signed-off-by: Jens Axboe --- 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))