From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
To: Peter Krempa <pkrempa@redhat.com>, qemu-devel@nongnu.org
Cc: John Snow <jsnow@redhat.com>,
Markus Armbruster <armbru@redhat.com>,
qemu-block@nongnu.org
Subject: Re: [PATCH 2/2] migration: dirty-bitmap: Allow control of bitmap persistence on destination
Date: Wed, 3 Feb 2021 16:23:21 +0300 [thread overview]
Message-ID: <a519d6af-7f24-e9bc-894b-070738008e01@virtuozzo.com> (raw)
In-Reply-To: <3afd4b353cf75c01c9260ca65e073d897e8c42d2.1612356810.git.pkrempa@redhat.com>
03.02.2021 16:00, Peter Krempa wrote:
> Bitmap's source persistence is transported over the migration stream and
> the destination mirrors it. In some cases the destination might want to
> persist bitmaps which are not persistent on the source (e.g. the result
> of merge of bitmaps from a number of layers on the source when migrating
> into a squashed image)
Why not make merge target on source be persistent itself? Then it will be persistent on migration destination.
> but currently it would need to create another set
> of persistent bitmaps and merge them.
>
> This adds 'dest-persistent' optional property to
> 'BitmapMigrationBitmapAlias' which when present overrides the bitmap
> presence state from the source.
It's seems simpler to make a separate qmp command block-dirty-bitmap-make-persistent.. Didn't you consider this way?
--
Best regards,
Vladimir
next prev parent reply other threads:[~2021-02-03 13:24 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-03 12:59 [PATCH 0/2] migration: dirty-bitmap: Allow control of bitmap persistence on destination Peter Krempa
2021-02-03 12:59 ` [PATCH 1/2] migration: dirty-bitmap: Convert alias map inner members to a struct Peter Krempa
2021-02-04 19:12 ` Eric Blake
2021-02-05 7:04 ` Vladimir Sementsov-Ogievskiy
2021-02-03 13:00 ` [PATCH 2/2] migration: dirty-bitmap: Allow control of bitmap persistence on destination Peter Krempa
2021-02-03 13:23 ` Vladimir Sementsov-Ogievskiy [this message]
2021-02-03 13:27 ` Peter Krempa
2021-02-03 13:39 ` Peter Krempa
2021-02-03 14:14 ` Vladimir Sementsov-Ogievskiy
2021-02-04 19:15 ` Eric Blake
2021-02-05 8:01 ` Vladimir Sementsov-Ogievskiy
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