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Re: [Qemu-devel] [PATCH v3 4/4] migration: Expose 'cancelling' status to

From: zhanghailiang
Subject: Re: [Qemu-devel] [PATCH v3 4/4] migration: Expose 'cancelling' status to user
Date: Mon, 9 Mar 2015 09:27:42 +0800
User-agent: Mozilla/5.0 (Windows NT 6.1; rv:31.0) Gecko/20100101 Thunderbird/31.1.1

On 2015/3/7 0:24, Eric Blake wrote:
On 03/04/2015 07:09 AM, zhanghailiang wrote:
'cancelling' status is introduced by commit 51cf4c1a, which is mainly avoid

s/is introduced/was introduced/
s/which is mainly avoid/mainly to avoid a/

possible starting a new migration process while the previous one still exist.

s/starting a new/start of a new/

But we don't expose this status to user, instead by return a 'active' state.

s/by return a/we returned the/

Here, we expose it to the user (such as libvirt), 'cancelling' status only
occurs for a short window before the migration aborts, so for users,
if they cancell a migration process, it will observe 'cancelling' status



Testing revealed that with older libvirt (anything 1.2.13 or less) will
print an odd error message if the state is seen, but that the migration
is still properly cancelled. Newer libvirt will be patched to recognize
the new state without the odd error message.

Signed-off-by: zhanghailiang <address@hidden>
Cc: address@hidden
  migration/migration.c | 6 +-----
  1 file changed, 1 insertion(+), 5 deletions(-)

With the grammar in the commit message fixed,
Reviewed-by: Eric Blake <address@hidden>

OK, will fix that in v4, thanks.

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