Re: [libvirt] [Qemu-devel] [PATCH v4 4/4] migration: Expose 'cancelling' status to user

On 09/03/2015 07:45, zhanghailiang wrote: > 'cancelling' status was introduced by commit 51cf4c1a, mainly to avoid a > possible start of a new migration process while the previous one still exists. > But we didn't expose this status to user, instead we returned the 'active' state. > > 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 cancel a migration process, it will observe 'cancelling' status > occasionally. > > 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 <zhang.zhanghailiang(a)huawei.com&gt; > Reviewed-by: Eric Blake <eblake(a)redhat.com&gt; > Cc: libvir-list(a)redhat.com Why is this necessary?