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From: "Denis V. Lunev" <den@virtuozzo.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
	Stefan Hajnoczi <stefanha@gmail.com>
Cc: Kevin Wolf <kwolf@redhat.com>,
	Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>,
	Fam Zheng <famz@redhat.com>,
	Markus Armbruster <armbru@redhat.com>,
	qemu-devel <qemu-devel@nongnu.org>, John Snow <jsnow@redhat.com>
Subject: Re: [Qemu-devel] [PATCH v2 0/6] external backup api
Date: Mon, 14 Mar 2016 19:27:42 +0300	[thread overview]
Message-ID: <56E6E67E.1000204@virtuozzo.com> (raw)
In-Reply-To: <56E1B18B.90307@redhat.com>

On 03/10/2016 08:40 PM, Paolo Bonzini wrote:
>
> On 10/03/2016 18:37, Stefan Hajnoczi wrote:
>> I suggest giving the new NBD command a "type" argument:
>> 0 - SCSI mapped/anchored values according to SCSI Get LBA Status
>> 1 - Dirty/clean, useful for incremental backup and other blocking tracking cases
>>
>> This way we don't impinge on SCSI semantics and the command can be
>> used for both traditional logical block provisioning and dirty bitmap
>> info.
>>
>> When the NBD export is started in QEMU you can optionally associate it
>> with a bitmap.  This bitmap is used to provide type=1 (dirty/clean)
>> status information.
> Good idea.  The precedent in NBD is to use bits 16..31 of the command
> for flags, so it could go there.
>
> Paolo
like this too.

Den

  reply	other threads:[~2016-03-14 16:27 UTC|newest]

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-30 10:56 [Qemu-devel] [PATCH v2 0/6] external backup api Vladimir Sementsov-Ogievskiy
2016-01-30 10:56 ` [Qemu-devel] [PATCH 1/6] block dirty bitmap: add next_zero function Vladimir Sementsov-Ogievskiy
2016-01-30 10:56 ` [Qemu-devel] [PATCH 2/6] qmp: add query-block-dirty-bitmap-ranges Vladimir Sementsov-Ogievskiy
2016-02-10 10:08   ` Stefan Hajnoczi
2016-02-10 13:57     ` Denis V. Lunev
2016-02-10 15:26       ` John Snow
2016-02-10 15:36         ` Denis V. Lunev
2016-02-10 15:37           ` John Snow
2016-02-10 15:40             ` Denis V. Lunev
2016-02-14  5:05       ` Fam Zheng
2016-01-30 10:56 ` [Qemu-devel] [PATCH 3/6] iotests: test query-block-dirty-bitmap-ranges Vladimir Sementsov-Ogievskiy
2016-01-30 10:56 ` [Qemu-devel] [PATCH 4/6] qapi: add qmp commands for some dirty bitmap functions Vladimir Sementsov-Ogievskiy
2016-01-30 10:56 ` [Qemu-devel] [PATCH 5/6] qapi: make block-dirty-bitmap-create-successor transaction-able Vladimir Sementsov-Ogievskiy
2016-01-30 10:56 ` [Qemu-devel] [PATCH 6/6] iotests: test external backup api Vladimir Sementsov-Ogievskiy
2016-02-03  8:14 ` [Qemu-devel] [PATCH v2 0/6] " Fam Zheng
2016-02-03 10:57   ` Vladimir Sementsov-Ogievskiy
2016-02-03 11:02     ` Fam Zheng
2016-02-03 11:24       ` Vladimir Sementsov-Ogievskiy
2016-02-05  8:28   ` Denis V. Lunev
2016-02-05  8:44     ` Fam Zheng
2016-02-09 14:21     ` Stefan Hajnoczi
2016-02-09 14:37       ` Denis V. Lunev
2016-02-09 16:49         ` John Snow
2016-02-09 16:58           ` Denis V. Lunev
2016-02-09 18:12             ` John Snow
2016-02-09 19:25               ` Denis V. Lunev
2016-02-10  8:04                 ` Denis V. Lunev
2016-02-09 14:28     ` Stefan Hajnoczi
2016-02-09 14:41       ` Denis V. Lunev
2016-02-10 10:10         ` Stefan Hajnoczi
2016-02-16 17:09           ` Stefan Hajnoczi
2016-02-16 17:17             ` Vladimir Sementsov-Ogievskiy
2016-02-16 17:20             ` Denis V. Lunev
2016-02-18 16:39               ` Stefan Hajnoczi
2016-02-18 17:07                 ` Markus Armbruster
2016-02-17 17:47             ` Vladimir Sementsov-Ogievskiy
2016-02-18  0:59               ` Fam Zheng
2016-02-18 12:11               ` Daniel P. Berrange
2016-02-18 16:41                 ` Stefan Hajnoczi
2016-02-19  2:08                   ` Fam Zheng
2016-02-19  8:51                     ` Markus Armbruster
2016-02-24 23:34                       ` John Snow
2016-02-26 19:55                       ` Paolo Bonzini
2016-02-26 20:03                         ` Paolo Bonzini
2016-02-26 20:29                           ` Denis V. Lunev
2016-02-26 21:37                           ` John Snow
2016-02-26 20:40                         ` Denis V. Lunev
2016-02-27  4:26                           ` Fam Zheng
2016-02-29  8:14                         ` Markus Armbruster
2016-02-29  8:54                           ` Paolo Bonzini
2016-02-29  9:42                             ` Paolo Bonzini
2016-02-29 10:05                               ` Fam Zheng
2016-03-10 17:37                               ` Stefan Hajnoczi
2016-03-10 17:40                                 ` Paolo Bonzini
2016-03-14 16:27                                   ` Denis V. Lunev [this message]
2016-02-29 10:22                           ` Markus Armbruster

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