[Bug 216343] XFS: no space left in xlog cause system hang

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=216343

--- Comment #4 from Amir Goldstein (amir73il@gmail.com) ---
On Tue, Aug 16, 2022 at 11:57 AM <bugzilla-daemon@kernel.org> wrote:
>
> https://bugzilla.kernel.org/show_bug.cgi?id=216343
>
> --- Comment #3 from zhoukete@126.com ---
> (In reply to Amir Goldstein from comment #2)
> >
> > I don't think so.
> > I think this buffer write is in-flight.
>
> But how to explain the XFS_DONE flag is set.Is XFS_DONE flag means the io had
> been done？
>

According to xfs_trans_dirty_buf() I think it could mean uptodate and
dirty buffer.

>
> >
> > Not sure if space cannot be released or just takes a lot of time.
>
> crash> ps -m 2006840
> [0 14:35:38.418] [UN]  PID: 2006840  TASK: ffff035f80de8f80  CPU: 51 
> COMMAND:
> "onestor-peon"
>
> pid 2006840 hang 14 hours. It is waiting for the xfs buf io finish.
> So I  think it is ‘cannot be released’ not take a lot of time.

Maybe the hardware never returned with a response?
Hard to say. Maybe someone else has ideas.

Thanks,
Amir.

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