On Fri, Sep 17, 2010 at 10:45:38AM +0800, Shaohua Li
wrote:> Chris,
> we are seeing kernel warning from time to time when doing btrfs test.
> That issue is hard to trigger, but it sometimes pop up. we saw this in
> both fio and ffsb test in several kernel version. Below is an example.
> do you have idea about it? we are glad to test patches/do debug if you
> can share some ideas.
Interesting. We''re backing up behind the ordered operations mutex, but
I don''t see the stack trace from the process currently holding it.
Could you please do a sysrq-w and record the results? We need to see
who we are stuck on.
My guess is we''re stuck waiting for IO, but the traces will say for
sure.
-chris
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs"
in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html