[dm-devel] Re: [PATCH 3/3] Add timeout feature
Eric Sandeen
sandeen at sandeen.net
Mon Sep 29 14:36:04 UTC 2008
Christoph Hellwig wrote:
> On Fri, Sep 26, 2008 at 05:52:35PM +0900, Takashi Sato wrote:
>> I think that your concern is that the freezer cannot recognize the occurrence
>> of a timeout and it continues the backup process and the backup data is
>> corrupted finally.
>
> What timeout should happen? the freeze ioctl must not return until the
> filesystem is a clean state and all writes are blocked.
The suggestion was that *UN*freeze would return ETIMEDOUT if the
filesystem had already unfrozen itself, I think. That way you know that
the snapshot you just took is worthless, at least.
I'm still not really sold on the timeout, but I think the above was the
intent.
-Eric
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