From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx2.suse.de ([195.135.220.15]:38393 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753658AbcGSODF (ORCPT ); Tue, 19 Jul 2016 10:03:05 -0400 From: Hannes Reinecke To: Mike Snitzer Cc: dm-devel-redhat.com@suse.de, Damien Le Moal , linux-scsi@vger.kernel.org, linux-block@vger.kernel.org, Christoph Hellwig , Jens Axboe , Hannes Reinecke Subject: [PATCH 2/3] sd: enable single-threaded I/O submission for zoned devices Date: Tue, 19 Jul 2016 16:02:57 +0200 Message-Id: <1468936978-9124-3-git-send-email-hare@suse.de> In-Reply-To: <1468936978-9124-1-git-send-email-hare@suse.de> References: <1468936978-9124-1-git-send-email-hare@suse.de> Sender: linux-block-owner@vger.kernel.org List-Id: linux-block@vger.kernel.org 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 --- 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