From: Damien Le Moal <damien.lemoal@wdc.com>
To: dm-devel@redhat.com, Mike Snitzer <snitzer@redhat.com>,
linux-block@vger.kernel.org, Jens Axboe <axboe@kernel.dk>
Subject: [dm-devel] [PATCH v5 03/11] block: introduce BIO_ZONE_WRITE_LOCKED bio flag
Date: Wed, 26 May 2021 06:24:53 +0900 [thread overview]
Message-ID: <20210525212501.226888-4-damien.lemoal@wdc.com> (raw)
In-Reply-To: <20210525212501.226888-1-damien.lemoal@wdc.com>
Introduce the BIO flag BIO_ZONE_WRITE_LOCKED to indicate that a BIO owns
the write lock of the zone it is targeting. This is the counterpart of
the struct request flag RQF_ZONE_WRITE_LOCKED.
This new BIO flag is reserved for now for zone write locking control
for device mapper targets exposing a zoned block device. Since in this
case, the lock flag must not be propagated to the struct request that
will be used to process the BIO, a BIO private flag is used rather than
changing the RQF_ZONE_WRITE_LOCKED request flag into a common REQ_XXX
flag that could be used for both BIO and request. This avoids conflicts
down the stack with the block IO scheduler zone write locking
(in mq-deadline).
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
---
include/linux/blk_types.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index db026b6ec15a..e5cf12f102a2 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -304,6 +304,7 @@ enum {
BIO_CGROUP_ACCT, /* has been accounted to a cgroup */
BIO_TRACKED, /* set if bio goes through the rq_qos path */
BIO_REMAPPED,
+ BIO_ZONE_WRITE_LOCKED, /* Owns a zoned device zone write lock */
BIO_FLAG_LAST
};
--
2.31.1
--
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next prev parent reply other threads:[~2021-05-25 21:25 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-25 21:24 [dm-devel] [PATCH v5 00/11] dm: Improve zoned block device support Damien Le Moal
2021-05-25 21:24 ` [dm-devel] [PATCH v5 01/11] block: improve handling of all zones reset operation Damien Le Moal
2021-05-26 6:36 ` Hannes Reinecke
2021-05-25 21:24 ` [dm-devel] [PATCH v5 02/11] block: introduce bio zone helpers Damien Le Moal
2021-05-25 21:24 ` Damien Le Moal [this message]
2021-05-25 21:24 ` [dm-devel] [PATCH v5 04/11] dm: Fix dm_accept_partial_bio() Damien Le Moal
2021-05-25 21:24 ` [dm-devel] [PATCH v5 05/11] dm: cleanup device_area_is_invalid() Damien Le Moal
2021-05-25 21:24 ` [dm-devel] [PATCH v5 06/11] dm: move zone related code to dm-zone.c Damien Le Moal
2021-05-25 21:24 ` [dm-devel] [PATCH v5 07/11] dm: Introduce dm_report_zones() Damien Le Moal
2021-05-25 21:24 ` [dm-devel] [PATCH v5 08/11] dm: Forbid requeue of writes to zones Damien Le Moal
2021-06-04 14:56 ` Mike Snitzer
2021-06-05 0:17 ` Damien Le Moal
2021-05-25 21:24 ` [dm-devel] [PATCH v5 09/11] dm: rearrange core declarations Damien Le Moal
2021-05-25 21:25 ` [dm-devel] [PATCH v5 10/11] dm: introduce zone append emulation Damien Le Moal
2021-05-26 6:40 ` Hannes Reinecke
2021-05-25 21:25 ` [dm-devel] [PATCH v5 11/11] dm crypt: Fix zoned block device support Damien Le Moal
2021-06-01 22:57 ` [dm-devel] [PATCH v5 00/11] dm: Improve " Damien Le Moal
2021-06-02 18:32 ` Mike Snitzer
2021-06-03 17:46 ` Jens Axboe
2021-06-03 22:16 ` Mike Snitzer
2021-06-03 23:44 ` Damien Le Moal
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