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Date: Fri, 18 Nov 2011 20:50:23 +0400
From: Solar Designer <solar@...nwall.com>
To: owl-dev@...ts.openwall.com
Subject: Re: kernel update? ext4 issues
On Fri, Nov 18, 2011 at 08:31:20PM +0400, (GalaxyMaster) wrote:
> 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).
This doesn't sound like the specific bug you referred to. For that one,
I'd expect just one error message and kernel panic. But I could be wrong.
> 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).
Yes.
> > (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.
All I meant was that other ext4 bugs were fixed in pre-274 kernels, but
since you say you had -274.3.1.el5xen this means that we likely have
that same bug that you hit, too. Yes, we need to update.
Alexander
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