From: Paolo Bonzini <pbonzini@redhat.com>
To: John Snow <jsnow@redhat.com>,
Vladimir Sementsov-Ogievskiy <vsementsov@parallels.com>,
qemu-devel@nongnu.org
Cc: kwolf@redhat.com, den@openvz.org, stefanha@redhat.com
Subject: Re: [Qemu-devel] [PATCH 9/9] block-migration: add named dirty bitmaps migration
Date: Mon, 12 Jan 2015 20:09:27 +0100 [thread overview]
Message-ID: <54B41BE7.1080909@redhat.com> (raw)
In-Reply-To: <54B404D9.6060203@redhat.com>
On 12/01/2015 18:31, John Snow wrote:
>> How do you track which parts of the disk have been acted upon (e.g.
>> mirrored in the case of the drive-mirror command), so that they have
>> become 0?
>
> Hm... so your question here is, "What happens if the named bitmap you
> are transferring gets reset to 0 during migration? Will anybody track
> this change?"
>
> As far as I know, the only "consumer" of _named_ BdrvDirtyBitmaps is
> block/backup.c, and we do not support it for mirror (yet?)
Right.
> So can a block-backup job be running WHILE we migrate?
I think so.
Paolo
next prev parent reply other threads:[~2015-01-12 19:09 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-11 14:17 [Qemu-devel] [PATCH 0/8] Dirty bitmaps migration Vladimir Sementsov-Ogievskiy
2014-12-11 14:17 ` [Qemu-devel] [PATCH 1/9] block: rename bdrv_reset_dirty_bitmap Vladimir Sementsov-Ogievskiy
2015-01-08 21:19 ` John Snow
2014-12-11 14:17 ` [Qemu-devel] [PATCH 2/9] block-migration: fix pending() return value Vladimir Sementsov-Ogievskiy
2015-01-08 21:20 ` John Snow
2015-01-09 19:01 ` Dr. David Alan Gilbert
2014-12-11 14:17 ` [Qemu-devel] [PATCH 3/9] block: fix spoiling all dirty bitmaps by mirror and migration Vladimir Sementsov-Ogievskiy
2015-01-08 21:20 ` John Snow
2014-12-11 14:17 ` [Qemu-devel] [PATCH 4/9] hbitmap: store / restore Vladimir Sementsov-Ogievskiy
2015-01-08 21:21 ` John Snow
2015-01-08 21:37 ` Paolo Bonzini
2015-01-13 12:59 ` Vladimir Sementsov-Ogievskiy
2015-01-13 17:08 ` John Snow
2015-01-14 10:29 ` Vladimir Sementsov-Ogievskiy
2014-12-11 14:17 ` [Qemu-devel] [PATCH 5/9] block: BdrvDirtyBitmap store/restore interface Vladimir Sementsov-Ogievskiy
2015-01-08 21:22 ` John Snow
2015-01-14 11:27 ` Vladimir Sementsov-Ogievskiy
2014-12-11 14:17 ` [Qemu-devel] [PATCH 6/9] block-migration: tiny refactoring Vladimir Sementsov-Ogievskiy
2015-01-08 21:23 ` John Snow
2015-01-14 12:26 ` Vladimir Sementsov-Ogievskiy
2015-01-14 16:53 ` John Snow
2014-12-11 14:17 ` [Qemu-devel] [PATCH 7/9] block-migration: remove not needed iothread lock Vladimir Sementsov-Ogievskiy
2015-01-08 21:24 ` John Snow
2015-01-16 12:54 ` Vladimir Sementsov-Ogievskiy
2015-01-08 22:28 ` Paolo Bonzini
2015-01-16 13:03 ` Vladimir Sementsov-Ogievskiy
2014-12-11 14:17 ` [Qemu-devel] [PATCH 8/9] migration: add dirty parameter Vladimir Sementsov-Ogievskiy
2014-12-11 15:18 ` Eric Blake
2014-12-15 8:33 ` Vladimir Sementsov-Ogievskiy
2015-01-08 21:51 ` John Snow
2015-01-08 22:29 ` Eric Blake
2015-01-08 22:31 ` John Snow
2015-01-08 22:37 ` Paolo Bonzini
2014-12-11 14:17 ` [Qemu-devel] [PATCH 9/9] block-migration: add named dirty bitmaps migration Vladimir Sementsov-Ogievskiy
2015-01-08 22:05 ` John Snow
2015-01-17 17:17 ` Vladimir Sementsov-Ogievskiy
2015-01-20 17:25 ` John Snow
2015-01-08 22:36 ` Paolo Bonzini
2015-01-08 22:45 ` Eric Blake
2015-01-08 22:49 ` Paolo Bonzini
2015-01-12 14:20 ` Vladimir Sementsov-Ogievskiy
2015-01-12 14:42 ` Paolo Bonzini
2015-01-12 16:48 ` Paolo Bonzini
2015-01-12 17:31 ` John Snow
2015-01-12 19:09 ` Paolo Bonzini [this message]
2015-01-13 9:16 ` Vladimir Sementsov-Ogievskiy
2015-01-13 16:35 ` John Snow
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