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Merge tag 'io_uring-bio-cache.5-2021-08-30' of git://git.kernel.dk/linux-block

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Pull support for struct bio recycling from Jens Axboe:
 "This adds bio recycling support for polled IO, allowing quick reuse of
  a bio for high IOPS scenarios via a percpu bio_set list.

  It's good for almost a 10% improvement in performance, bumping our
  per-core IO limit from ~3.2M IOPS to ~3.5M IOPS"

* tag 'io_uring-bio-cache.5-2021-08-30' of git://git.kernel.dk/linux-block:
  bio: improve kerneldoc documentation for bio_alloc_kiocb()
  block: provide bio_clear_hipri() helper
  block: use the percpu bio cache in __blkdev_direct_IO
  io_uring: enable use of bio alloc cache
  block: clear BIO_PERCPU_CACHE flag if polling isn't supported
  bio: add allocation cache abstraction
  fs: add kiocb alloc cache flag
  bio: optimize initialization of a bio
This commit is contained in:
Linus Torvalds
2021-08-30 19:30:30 -07:00
parent c547d89a9a 3d5b3fbeda
commit 3b629f8d6d
10 changed files with 184 additions and 21 deletions
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2
block/blk-merge.c
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@@ -285,7 +285,7 @@ split:
* iopoll in direct IO routine. Given performance gain of iopoll for
* big IO can be trival, disable iopoll when split needed.
*/
bio->bi_opf &= ~REQ_HIPRI;
bio_clear_hipri(bio);
return bio_split(bio, sectors, GFP_NOIO, bs);
}