From patchwork Wed May 1 00:09:21 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 13650110 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D4E4F10F4; Wed, 1 May 2024 00:09:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714522177; cv=none; b=lW2VsN4pMlkbSDzf4D4QVfkAjoc8vvrfOpI2Sm1vv6twQZ/30Ur6DZKg1Z7zNOaEYxU785Ci/+EV4CT8SKAeFEHZJo+GbgqE8x4QqWnnhFRRh1E7btTByhs5BbIxqVh3fbY1+0sU5wwMPbyT63W1yE1rMKxkGWiZt6/kJ4xdJRM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714522177; c=relaxed/simple; bh=sOTOshkpbQbsJkVc1P//maH/b0XmB/j5rgwXc0sBu1s=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=QXueFmLZmYqSSF5Z0KWLq3Lay1uZJl1S3f6YmrExUJbqAVJcVyU0EPQz1w03+Mnz6UL3WDMZ/E4u4Eo3Am81hRaSFbNnsEzrNxfp60yc5W3uHyuP5gMlpN8+gzIVc/C1kgk7mbHIsGLLczIAVphO8ZC5qHaXPt4kRZ4RCv5rfIw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=C5PHm71M; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="C5PHm71M" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8102EC2BBFC; Wed, 1 May 2024 00:09:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1714522177; bh=sOTOshkpbQbsJkVc1P//maH/b0XmB/j5rgwXc0sBu1s=; h=From:To:Subject:Date:From; b=C5PHm71MHLImg3WMwNdHsht2mcscJWlg7dzzYFzyn3uPIFPVQ8XSAlw1uFRrwV4Us peKoO5/6LgdeJzWCplGCXdN5Jb4z6DD8+fRa+T9JfO6zcKGZDJptwex9XT4oZTsifM Rtnwke3F60CaTHc3Q1khzQ01Yw3qY/hi2gWG/fJxQsgAdDOkVGlTdO8ocNZcQIcInh r9CfxO3QJ3eTtvzt4XzqurIEB2lb8eyYcYJjOboyELHOafXzVmflkshsEL+E98UHhw gUrOUN3hQtzEcs7iy9mzf812ZUGkHoLzzHkRFkMEyivQbDRNRcXFRaEs3LdmHGnsVH xzgnIgjptDHfg== From: Damien Le Moal To: linux-block@vger.kernel.org, Jens Axboe , dm-devel@lists.linux.dev, Mike Snitzer Subject: [PATCH v2 00/14] Zone write plugging fixes and cleanup Date: Wed, 1 May 2024 09:09:21 +0900 Message-ID: <20240501000935.100534-1-dlemoal@kernel.org> X-Mailer: git-send-email 2.44.0 Precedence: bulk X-Mailing-List: dm-devel@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Jens, Mike, With more testing of zone write plugging on more device setups, including weird/test setups (with scsi debug and null_blk), several issues were identified. This patch series addresses them and cleanup the code a little to try to make it more obvious. The first patch is a DM modification to not expose zoned devices composed solely of conventional zones as zoned block devices. The second patch is a fix partly related to this to expose a correct max open zones limit for devices with no limits (which DM devices are as the max open/active limit is not propagated to the mapped device as there is no easy way to do that). Patches 3 to 9 are bug fixes. The most serious problem among theses was detected with tests using scsi_debug zoned devices and is fixed in patch 7. Patches 10 to 14 improve and cleanup the code. Changes from v1: - Changed patch 4 as suggested by Christoph - Added additional comments in patch 7 to clarify the check for the zone write plug reference count in disk_should_remove_zone_wplug() - Added patch 14 - Added review tags Damien Le Moal (14): dm: Check that a zoned table leads to a valid mapped device block: Exclude conventional zones when faking max open limit block: Fix zone write plug initialization from blk_revalidate_zone_cb() block: Fix reference counting for zone write plugs in error state block: Hold a reference on zone write plugs to schedule submission block: Unhash a zone write plug only if needed block: Do not remove zone write plugs still in use block: Fix flush request sector restore block: Fix handling of non-empty flush write requests to zones block: Improve blk_zone_write_plug_bio_merged() block: Improve zone write request completion handling block: Simplify blk_zone_write_plug_bio_endio() block: Simplify zone write plug BIO abort block: Cleanup blk_revalidate_zone_cb() block/blk-flush.c | 3 +- block/blk-mq.c | 12 +- block/blk-zoned.c | 407 +++++++++++++++++++++++++++--------------- block/blk.h | 12 +- drivers/md/dm-table.c | 3 +- drivers/md/dm-zone.c | 53 ++++++ 6 files changed, 334 insertions(+), 156 deletions(-)