Re: [Qemu-stable] [PATCH] qga: ignore EBUSY when freezing a filesystem

[Peter Lieven]

Am 02.02.2017 um 22:41 schrieb Paolo Bonzini:
>
> On 31/01/2017 07:36, Peter Lieven wrote:
>> the current implementation fails if we try to freeze an
>> already frozen filesystem. This can happen if a filesystem
>> is mounted more than once (e.g. with a bind mount).
>>
>> Suggested-by: Christian Theune <address@hidden>
>> Cc: address@hidden
>> Signed-off-by: Peter Lieven <address@hidden>
> What happens when you thaw?
>
> Paolo

If you try to THAW an unfrozen FS you get EINVAL.

The current code thaws until an error is returned.


So it should work as is.


If you feel uncomfortable with the EBUSY approach. The other idea would

be to track all devices which have been successfully frozen and skip consecutive

tries to freeze them.


Peter