From: Eric Sandeen <sandeen@redhat.com>
To: Fredrik Andersson <nablaman@gmail.com>
Cc: linux-ext4@vger.kernel.org
Subject: Re: Fwd: Ext4 bug with fallocate
Date: Sun, 18 Oct 2009 10:57:32 -0500 [thread overview]
Message-ID: <4ADB3AEC.8040901@redhat.com> (raw)
In-Reply-To: <a125a870910180847s5f3eaf6cxfe58e6ceb26419c6@mail.gmail.com>
Fredrik Andersson wrote:
> Hi, I'd like to report what I'm fairly certain is an ext4 bug. I hope
> this is the right place to do so.
>
> My program creates a big file (around 30 GB) with posix_fallocate (to
> utilize extents), fills it with data and uses ftruncate to crop it to
> its final size (usually somewhere between 20 and 25 GB).
> The problem is that in around 5% of the cases, the program locks up
> completely in a syscall. The process can thus not be killed even with
> kill -9, and a reboot is all that will do.
does echo w > /proc/sysrq-trigger (this does sleeping processes; or use
echo t for all processes) show you where the stuck threads are?
-Eric
next prev parent reply other threads:[~2009-10-18 15:57 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <a125a870910180836i66781e1ey8113e7f8569f1fad@mail.gmail.com>
2009-10-18 15:47 ` Fwd: Ext4 bug with f Fredrik Andersson
2009-10-18 15:57 ` Eric Sandeen [this message]
2009-10-19 9:49 ` Fwd: Ext4 bug with fallocate Fredrik Andersson
2009-10-20 16:49 ` Fredrik Andersson
2009-10-21 0:24 ` Mingming
2009-10-22 7:37 ` Fredrik Andersson
2009-10-26 10:43 ` Fredrik Andersson
2009-10-21 2:20 ` Eric Sandeen
2009-10-21 9:08 ` Fredrik Andersson
2009-10-27 4:42 ` Eric Sandeen
2009-10-27 8:17 ` Fredrik Andersson
2009-10-27 13:56 ` Eric Sandeen
2009-10-27 15:29 ` Fredrik Andersson
2009-10-27 15:37 ` Eric Sandeen
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