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Re: [Qemu-block] [PATCH for-2.10 v2 3/4] block-backend: Defer shared_per


From: Eric Blake
Subject: Re: [Qemu-block] [PATCH for-2.10 v2 3/4] block-backend: Defer shared_perm tightening migration completion
Date: Tue, 15 Aug 2017 09:21:49 -0500
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1

On 08/15/2017 08:07 AM, Fam Zheng wrote:
> As in the case of nbd_export_new(), bdrv_invalidate_cache() can be
> called when migration is still in progress. In this case we are not
> ready to tighten the shared permissions fenced by blk->disable_perm.
> 
> Defer to a VM state change handler.
> 
> Signed-off-by: Fam Zheng <address@hidden>
> ---
>  block/block-backend.c | 41 +++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 41 insertions(+)

Reviewed-by: Eric Blake <address@hidden>

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

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