From: Hannes Reinecke <hare@suse.de>
To: Mike Snitzer <snitzer@redhat.com>
Cc: dm-devel-redhat.com@suse.de,
Damien Le Moal <damien.lemoal@hgst.com>,
linux-scsi@vger.kernel.org, linux-block@vger.kernel.org,
Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@fb.com>,
Hannes Reinecke <hare@suse.de>
Subject: [PATCH 2/3] sd: enable single-threaded I/O submission for zoned devices
Date: Tue, 19 Jul 2016 16:02:57 +0200 [thread overview]
Message-ID: <1468936978-9124-3-git-send-email-hare@suse.de> (raw)
In-Reply-To: <1468936978-9124-1-git-send-email-hare@suse.de>
zoned devices require single-thread I/O submission to guarantee
sequential I/O, so enable the block layer flag for it.
Signed-off-by: Hannes Reinecke <hare@suse.de>
---
drivers/scsi/sd.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 4b704b0..44960fd 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -2154,6 +2154,7 @@ static void sd_read_zones(struct scsi_disk *sdkp, unsigned char *buffer)
blk_queue_chunk_sectors(sdkp->disk->queue,
logical_to_sectors(sdkp->device, zone_len));
sd_config_discard(sdkp, SD_ZBC_RESET_WP);
+ queue_flag_set_unlocked(QUEUE_FLAG_SINGLE, sdkp->disk->queue);
sd_zbc_setup(sdkp, buffer, SD_BUF_SIZE);
}
--
1.8.5.6
next prev parent reply other threads:[~2016-07-19 14:03 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-19 14:02 [PATCH 0/3] dm-zoned target for ZBC devices Hannes Reinecke
2016-07-19 14:02 ` [PATCH 1/3] block: add flag for single-threaded submission Hannes Reinecke
2016-07-20 1:13 ` Damien Le Moal
2016-07-21 5:54 ` Christoph Hellwig
2016-07-21 6:01 ` Hannes Reinecke
2016-07-21 6:37 ` Hannes Reinecke
2016-07-21 7:10 ` Damien Le Moal
2016-07-21 14:38 ` Christoph Hellwig
2016-07-19 14:02 ` Hannes Reinecke [this message]
2016-07-20 1:15 ` [PATCH 2/3] sd: enable single-threaded I/O submission for zoned devices Damien Le Moal
2016-07-19 14:02 ` [PATCH 3/3] dm-zoned: New device mapper target for zoned block devices Hannes Reinecke
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