From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: [PATCH 04/13] aoe: set an optimal I/O size Date: Thu, 24 Sep 2020 08:51:31 +0200 Message-ID: <20200924065140.726436-5-hch@lst.de> References: <20200924065140.726436-1-hch@lst.de> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20200924065140.726436-1-hch@lst.de> To: Jens Axboe Cc: Song Liu , Hans de Goede , Coly Li , Richard Weinberger , Minchan Kim , Johannes Thumshirn , Justin Sanders , linux-mtd@lists.infradead.org, dm-devel@redhat.com, linux-block@vger.kernel.org, linux-bcache@vger.kernel.org, linux-kernel@vger.kernel.org, drbd-dev@lists.linbit.com, linux-raid@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, Jan Kara List-Id: dm-devel.ids aoe forces a larger readahead size, but any reason to do larger I/O is not limited to readahead. Also set the optimal I/O size, and remove the local constants in favor of just using SZ_2G. Signed-off-by: Christoph Hellwig Reviewed-by: Jan Kara --- drivers/block/aoe/aoeblk.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c index 5ca7216e9e01f3..d8cfc233e64b93 100644 --- a/drivers/block/aoe/aoeblk.c +++ b/drivers/block/aoe/aoeblk.c @@ -347,7 +347,6 @@ aoeblk_gdalloc(void *vp) mempool_t *mp; struct request_queue *q; struct blk_mq_tag_set *set; - enum { KB = 1024, MB = KB * KB, READ_AHEAD = 2 * MB, }; ulong flags; int late = 0; int err; @@ -407,7 +406,8 @@ aoeblk_gdalloc(void *vp) WARN_ON(d->gd); WARN_ON(d->flags & DEVFL_UP); blk_queue_max_hw_sectors(q, BLK_DEF_MAX_SECTORS); - q->backing_dev_info->ra_pages = READ_AHEAD / PAGE_SIZE; + q->backing_dev_info->ra_pages = SZ_2M / PAGE_SIZE; + blk_queue_io_opt(q, SZ_2M); d->bufpool = mp; d->blkq = gd->queue = q; q->queuedata = d; -- 2.28.0