From: Kevin Wolf <kwolf@redhat.com>
To: benoit.canet@gmail.com
Cc: stefanha@gmail.com, pbonzini@redhat.com,
"Benoît Canet" <benoit@irqsave.net>,
qemu-devel@nongnu.org, stefanha@linux.vnet.ibm.com
Subject: Re: [Qemu-devel] [PATCH V4 0/3] Block migration if any of the block device is busy
Date: Tue, 24 Jul 2012 11:52:46 +0200 [thread overview]
Message-ID: <500E706E.8030405@redhat.com> (raw)
In-Reply-To: <1343053380-12133-1-git-send-email-benoit@irqsave.net>
Am 23.07.2012 16:22, schrieb benoit.canet@gmail.com:
> From: Benoît Canet <benoit@irqsave.net>
>
> This patchset is designed to avoid starting a live migration while any of
> the block device is busy.
>
> Tested with the following sequence:
>
> QEMU 1.1.50 monitor - type 'help' for more information
> (qemu) block_stream virtio0 1k
> (qemu) migrate tcp:localhost:4444
> migrate: Migration is blocked by streaming
> (qemu) block_job_cancel virtio0
> (qemu) migrate tcp:localhost:4444
> migrate: Connection can not be completed immediately
> (qemu)
> => migration then succeed
Maybe I'm missing the obvious, but why? Migration will stop the
streaming if it isn't restarted explicitly on the destination, but I
think that's expected.
Also, there are migration blockers. Wouldn't it be better to use them
instead of adding more special-case code to migration.c?
Kevin
next prev parent reply other threads:[~2012-07-24 9:53 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-23 14:22 [Qemu-devel] [PATCH V4 0/3] Block migration if any of the block device is busy benoit.canet
2012-07-23 14:22 ` [Qemu-devel] [PATCH V4 1/3] block: Add bdrv_are_busy() benoit.canet
2012-07-23 17:15 ` Luiz Capitulino
2012-07-24 10:10 ` Benoît Canet
2012-07-24 12:55 ` Luiz Capitulino
2012-07-24 13:29 ` Kevin Wolf
2012-07-24 14:37 ` Benoît Canet
2012-07-24 14:42 ` Kevin Wolf
2012-07-23 14:22 ` [Qemu-devel] [PATCH V4 2/3] qerror: Add error telling that block dev usage prevents migration benoit.canet
2012-07-23 17:09 ` Luiz Capitulino
2012-07-23 14:23 ` [Qemu-devel] [PATCH V4 3/3] migration: block migration when any of the block device is busy benoit.canet
2012-07-23 14:58 ` [Qemu-devel] [PATCH V4 0/3] Block migration if " Stefan Hajnoczi
2012-07-24 9:52 ` Kevin Wolf [this message]
2012-07-24 10:04 ` Stefan Hajnoczi
2012-07-24 10:19 ` Kevin Wolf
2012-07-24 11:12 ` Paolo Bonzini
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