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Re: [Qemu-block] [Qemu-devel] [PATCH 0/2] block: fix nbd-server-stop cra

From: Eric Blake
Subject: Re: [Qemu-block] [Qemu-devel] [PATCH 0/2] block: fix nbd-server-stop crash after blockdev-snapshot-sync
Date: Mon, 12 Mar 2018 20:27:48 -0500
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0

On 03/08/2018 11:37 AM, Stefan Hajnoczi wrote:
On Wed, Mar 07, 2018 at 05:27:45PM -0600, Eric Blake wrote:
On 03/06/2018 02:48 PM, Stefan Hajnoczi wrote:
The blockdev-snapshot-sync command uses bdrv_append() to update all parents to
point at the external snapshot node.  This breaks BlockBackend's
blk_add/remove_aio_context_notifier(), which doesn't expect a BDS change.

Whose tree should this series go through?  MAINTAINERS didn't flag it as
directly touching any files that normally affect my NBD queue, but given
that the iotest that reproduces the problem uses NBD, I'm fine if you want
it to go through me.

Good question.  Max and Kevin maintain block/block-backend.c so one of
them should be happy with this series before it gets merged.

When a patch affects multiple trees, the last sub-maintainer to review
it can do the merge.

So if they have already posted their R-b when you are finished, then
feel free to merge it!  And vice versa.

Max has reviewed, so this is now queued on my NBD tree, pull request to come shortly.

Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org

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