linux-ext4 - [Bug 73051] Hung Tasks related to ext4 IO

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Message-ID: <bug-73051-13602-BpSoVMq9i4@https.bugzilla.kernel.org/>
Date:	Tue, 08 Apr 2014 11:20:36 +0000
From:	bugzilla-daemon@...zilla.kernel.org
To:	linux-ext4@...r.kernel.org
Subject: [Bug 73051] Hung Tasks related to ext4 IO

https://bugzilla.kernel.org/show_bug.cgi?id=73051

--- Comment #3 from Nik Martin <nik.martin@...il.com> ---
I can try that, and see if I can replicate the issue. I'm not exactly sure
how to disable bcache, it's not the most well documented system.
On Apr 7, 2014 8:25 AM, <bugzilla-daemon@...zilla.kernel.org> wrote:

> https://bugzilla.kernel.org/show_bug.cgi?id=73051
>
> Jan Kara <jack@...e.cz> changed:
>
>            What    |Removed                     |Added
>
> ----------------------------------------------------------------------------
>              Status|NEW                         |NEEDINFO
>                  CC|                            |jack@...e.cz
>
> --- Comment #2 from Jan Kara <jack@...e.cz> ---
> Looking into the traces, this doesn't seem to be ext4 problem at the first
> sight. We are waiting in filemap_fdatawait_range() for IO on the page to
> finish. It seems that never happens which would be a bug somewhere in the
> block
> layer, device mapper, etc. Seeing that you mention bcache, would it be
> possible
> to try whether the hangs happen without it?
>
> --
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