From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>,
hch@lst.de, martin.petersen@oracle.com, darrick.wong@oracle.com,
axboe@kernel.dk, tytso@mit.edu, adilger.kernel@dilger.ca,
ming.lei@redhat.com, jthumshirn@suse.de, minwoo.im.dev@gmail.com,
damien.lemoal@wdc.com, andrea.parri@amarulasolutions.com,
hare@suse.com, tj@kernel.org, hannes@cmpxchg.org,
ajay.joshi@wdc.com, bvanassche@acm.org, arnd@arndb.de,
houtao1@huawei.com, asml.silence@gmail.com,
linux-block@vger.kernel.org, linux-ext4@vger.kernel.org
Subject: Re: [PATCH 0/4] block: Add support for REQ_OP_ASSIGN_RANGE
Date: Wed, 01 Apr 2020 22:29:38 -0400 [thread overview]
Message-ID: <yq1v9mi4o31.fsf@oracle.com> (raw)
In-Reply-To: <bb7d7604-8ee5-97d8-1563-9140cd499f15@yandex-team.ru> (Konstantin Khlebnikov's message of "Wed, 1 Apr 2020 09:22:26 +0300")
Konstantin,
>> The corresponding exported primitive is called
>> blkdev_issue_assign_range().
>
> What exact semantics of that?
REQ_OP_ALLOCATE will be used to compel a device to allocate a block
range. What a given block contains after successful allocation is
undefined (depends on the device implementation).
For block allocation with deterministic zeroing, one must keep using
REQ_OP_WRITE_ZEROES with the NOUNMAP flag set.
--
Martin K. Petersen Oracle Linux Engineering
next prev parent reply other threads:[~2020-04-02 2:32 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-29 17:47 [PATCH 0/4] block: Add support for REQ_OP_ASSIGN_RANGE Chaitanya Kulkarni
2020-03-29 17:47 ` [PATCH 1/4] block: create payloadless issue bio helper Chaitanya Kulkarni
2020-03-29 17:47 ` [PATCH 2/4] block: Add support for REQ_OP_ASSIGN_RANGE Chaitanya Kulkarni
2020-03-29 17:47 ` [PATCH 3/4] loop: Forward REQ_OP_ASSIGN_RANGE into fallocate(0) Chaitanya Kulkarni
2020-03-29 17:47 ` [PATCH 4/4] ext4: Notify block device about alloc-assigned blk Chaitanya Kulkarni
2020-04-01 6:22 ` [PATCH 0/4] block: Add support for REQ_OP_ASSIGN_RANGE Konstantin Khlebnikov
2020-04-02 2:29 ` Martin K. Petersen [this message]
2020-04-02 9:49 ` Konstantin Khlebnikov
2020-04-02 22:41 ` Dave Chinner
2020-04-03 1:34 ` Martin K. Petersen
2020-04-03 2:57 ` Dave Chinner
[not found] ` <(Dave>
[not found] ` <(Chaitanya>
[not found] ` <Kulkarni's>
[not found] ` <message>
[not found] ` <of>
[not found] ` <"Tue>
[not found] ` <12>
[not found] ` <"Mon>
[not found] ` <13>
[not found] ` <"Fri>
[not found] ` <3>
[not found] ` <"Sun>
[not found] ` <29>
[not found] ` <Mar>
[not found] ` <2020>
[not found] ` <13:57:57>
[not found] ` <+1100")>
2020-04-03 3:45 ` Martin K. Petersen
2020-04-07 2:27 ` Dave Chinner
2020-04-08 4:10 ` Martin K. Petersen
2020-04-19 22:36 ` Dave Chinner
2020-04-23 0:40 ` Martin K. Petersen
[not found] ` <10:47:10>
[not found] ` <-0700")>
2020-04-01 2:29 ` Martin K. Petersen
2020-04-01 4:53 ` Chaitanya Kulkarni
2020-05-12 16:01 ` [PATCH v11 00/10] Introduce Zone Append for writing to zoned block devices Martin K. Petersen
2020-05-12 16:04 ` Christoph Hellwig
2020-05-12 16:12 ` Martin K. Petersen
2020-05-12 16:18 ` Johannes Thumshirn
2020-05-12 16:24 ` Martin K. Petersen
[not found] ` <20:35:11>
[not found] ` <+0800")>
2020-07-13 16:47 ` [PATCH 2/2] block: improve discard bio alignment in __blkdev_issue_discard() Martin K. Petersen
2020-07-13 17:50 ` Coly Li
2020-05-12 8:55 [PATCH v11 00/10] Introduce Zone Append for writing to zoned block devices Johannes Thumshirn
2020-05-12 8:55 ` [PATCH v11 01/10] block: provide fallbacks for blk_queue_zone_is_seq and blk_queue_zone_no Johannes Thumshirn
2020-05-12 8:55 ` [PATCH v11 02/10] block: rename __bio_add_pc_page to bio_add_hw_page Johannes Thumshirn
2020-05-12 8:55 ` [PATCH v11 03/10] block: Introduce REQ_OP_ZONE_APPEND Johannes Thumshirn
2020-05-12 8:55 ` [PATCH v11 04/10] block: introduce blk_req_zone_write_trylock Johannes Thumshirn
2020-05-12 8:55 ` [PATCH v11 05/10] block: Modify revalidate zones Johannes Thumshirn
2020-05-12 8:55 ` [PATCH v11 06/10] scsi: sd_zbc: factor out sanity checks for zoned commands Johannes Thumshirn
2020-05-12 8:55 ` [PATCH v11 07/10] scsi: sd_zbc: emulate ZONE_APPEND commands Johannes Thumshirn
2020-05-12 8:55 ` [PATCH v11 08/10] null_blk: Support REQ_OP_ZONE_APPEND Johannes Thumshirn
2020-05-12 8:55 ` [PATCH v11 09/10] block: export bio_release_pages and bio_iov_iter_get_pages Johannes Thumshirn
2020-05-12 8:55 ` [PATCH v11 10/10] zonefs: use REQ_OP_ZONE_APPEND for sync DIO Johannes Thumshirn
2020-05-12 13:17 ` [PATCH v11 00/10] Introduce Zone Append for writing to zoned block devices Christoph Hellwig
[not found] ` <(Christoph>
2020-05-13 2:37 ` Jens Axboe
2020-07-13 12:35 [PATCH 0/2] two generic block layer fixes for 5.9 Coly Li
2020-07-13 12:35 ` [PATCH 1/2] block: change REQ_OP_ZONE_RESET and REQ_OP_ZONE_RESET_ALL to be odd numbers Coly Li
2020-07-13 23:12 ` Damien Le Moal
2020-07-13 12:35 ` [PATCH 2/2] block: improve discard bio alignment in __blkdev_issue_discard() Coly Li
[not found] ` <(Coly>
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