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Date: Fri, 18 Nov 2011 20:31:20 +0400
From: "(GalaxyMaster)" <galaxy@...nwall.com>
To: owl-dev@...ts.openwall.com
Subject: Re: kernel update? ext4 issues

Solar,

On Fri, Nov 18, 2011 at 08:18:18PM +0400, Solar Designer wrote:
> Ouch.  I doubt that you were hit by this specific bug.  Can you provide
> more detail on the symptoms?  Did you have a file of almost exactly 4 GB?

Yes, this is the case.  The file was InnoDB tablespace and was 4GB.  I'm
quite confident that I encountered the mentioned bug.  The symptoms were
that the server became unreachable by ssh and it's console was saying
that ext4 code failed to allocate a block (this was in a loop).
Unfortunately, I don't recall the exact error message, but when I
investigated that I was quite sure that the crash was the result of the
bug I mentioned in the original post.

> What kernel version were you running?

CentOS 2.6.18-274.3.1.el5xen (but IIUC it's the same ext4 code as the
kernel we have in Owl).

>  (There were ext4 fixes before
> -274 as well, so maybe the bug that you hit is already fixed in our
> current kernel.)

RH fixed a lot of off by 1 ext4 issues in 274.4.1, so I doubt that our
kernel contains them.

-- 
(GM)

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