linux-kernel - [PATCH 5/5] block_dev: make blkdev_dio

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Message-ID: <148912564767.4002.1734839418362310960.stgit@noble>
Date:   Fri, 10 Mar 2017 17:00:47 +1100
From:   NeilBrown <neilb@...e.com>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     linux-block@...r.kernel.org, Mike Snitzer <snitzer@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>, linux-raid@...r.kernel.org,
        device-mapper development <dm-devel@...hat.com>,
        Mikulas Patocka <mpatocka@...hat.com>,
        Pavel Machek <pavel@....cz>,
        Jack Wang <jinpu.wang@...fitbricks.com>,
        Lars Ellenberg <lars.ellenberg@...bit.com>,
        Kent Overstreet <kent.overstreet@...il.com>
Subject: [PATCH 5/5] block_dev: make blkdev_dio_pool a non-rescuing bioset

Allocations from blkdev_dio_pool are never made under
generic_make_request, so this bioset does not need a rescuer thread.

Signed-off-by: NeilBrown <neilb@...e.com>
---
 fs/block_dev.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/block_dev.c b/fs/block_dev.c
index c0ca5f0d0369..2eca00ec4370 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -436,7 +436,7 @@ blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
 
 static __init int blkdev_init(void)
 {
-	blkdev_dio_pool = bioset_create_rescued(4, offsetof(struct blkdev_dio, bio));
+	blkdev_dio_pool = bioset_create(4, offsetof(struct blkdev_dio, bio));
 	if (!blkdev_dio_pool)
 		return -ENOMEM;
 	return 0;