Re: ext4: (2.6.34-rc4): This should not happen!! Data will be lost

[Eric Sandeen <sandeen@redhat.com>]

Bernd Schubert wrote:
...

> Altogether filesystem unrelated. The filesystem just might be the reason for a 
> synchronize-cache, e.g. barriers, etc.

Interesting that it only happens at enospc time though - the fs would
be sending barriers in general usage.

Although, as ext4 fills, it does do more syncing/flushing to try to
eke out that last bit of space.... hmm....

Andre, just for fun, you might try mounting -o nodelalloc, fill it again,
and see if you see the same behavior.

If not, you might do it again w/ defaults, and capture blktrace data, which
I think will trace barrier requests as well.

(or, maybe also try testing with -o nobarrier)

I still don't think it's likely a filesystem problem but maybe you can
pinpoint the fs behavior that triggers it.

-Eric
 
> Greetings from Tübingen,
> Bernd 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html