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From: Jens Axboe <[email protected]>
To: [email protected]
Cc: [email protected], [email protected],
	Jens Axboe <[email protected]>
Subject: [PATCH 5/6] io_uring: enable use of bio alloc cache
Date: Wed, 11 Aug 2021 13:35:32 -0600	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

Mark polled IO as being safe for dipping into the bio allocation
cache, in case the targeted bio_set has it enabled.

This brings an IOPOLL gen2 Optane QD=128 workload from ~3.0M IOPS to
~3.3M IOPS.

Signed-off-by: Jens Axboe <[email protected]>
---
 fs/io_uring.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index bd3f8529fe6f..00da7bdd2b53 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2667,7 +2667,7 @@ static int io_prep_rw(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 		    !kiocb->ki_filp->f_op->iopoll)
 			return -EOPNOTSUPP;
 
-		kiocb->ki_flags |= IOCB_HIPRI;
+		kiocb->ki_flags |= IOCB_HIPRI | IOCB_ALLOC_CACHE;
 		kiocb->ki_complete = io_complete_rw_iopoll;
 		req->iopoll_completed = 0;
 	} else {
-- 
2.32.0


  parent reply	other threads:[~2021-08-11 19:35 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-11 19:35 [PATCHSET v4 0/6] Enable bio recycling for polled IO Jens Axboe
2021-08-11 19:35 ` [PATCH 1/6] bio: optimize initialization of a bio Jens Axboe
2021-08-12  6:51   ` Christoph Hellwig
2021-08-12 15:29     ` Jens Axboe
2021-08-11 19:35 ` [PATCH 2/6] fs: add kiocb alloc cache flag Jens Axboe
2021-08-12  6:54   ` Christoph Hellwig
2021-08-12 14:52     ` Jens Axboe
2021-08-11 19:35 ` [PATCH 3/6] bio: add allocation cache abstraction Jens Axboe
2021-08-12  7:01   ` Christoph Hellwig
2021-08-12 15:08     ` Jens Axboe
2021-08-12 15:18       ` Christoph Hellwig
2021-08-12 15:26         ` Jens Axboe
2021-08-11 19:35 ` [PATCH 4/6] block: clear BIO_PERCPU_CACHE flag if polling isn't supported Jens Axboe
2021-08-11 19:35 ` Jens Axboe [this message]
2021-08-11 19:35 ` [PATCH 6/6] block: enable use of bio allocation cache Jens Axboe
2021-08-12  7:04   ` Christoph Hellwig
2021-08-12 14:52     ` Jens Axboe
  -- strict thread matches above, loose matches on Subject: below --
2021-08-12 15:41 [PATCHSET v5 0/6] Enable bio recycling for polled IO Jens Axboe
2021-08-12 15:41 ` [PATCH 5/6] io_uring: enable use of bio alloc cache Jens Axboe
2021-08-12 16:39   ` Christoph Hellwig
2021-08-12 16:46     ` Jens Axboe

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