Re: Oops and Panics in 2.6.21.1, 2.6.20.6 and 2.6.19.2

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On Wed, 16 May 2007 13:05:19 +0200 Tejun Heo <[email protected]> wrote:

> Hello,
> 
> Andrew Morton wrote:
> > On Wed, 16 May 2007 09:24:54 +0900 Clemens Schwaighofer <[email protected]> wrote:
> > 
> >> I have re-occurring oopses and panics in those above kernels. The error
> >> is always the same. I have the last Kernel Panic as a picture here:
> >>
> >> http://dev.tequila.jp/clemens/R0010172.JPG
> >>
> >> The oops have the same error style like this Panic. I tried to capture
> >> one, but right after copying it into vim, I got a Panic. So next time I
> >> try to.
> >>
> >> I think it started with 2.6.19.2, I cannot remember I had any of those
> >> problems before. The box can work fine for about a week or more, or it
> >> looks up several times a day. I run a memtest for 10 h, but I had no errors.
> > 
> > shrink_dcache_memory->...sysfs_d_iput->BUG
> > 
> >                 BUG_ON(sd->s_dentry != dentry);
> > 
> > a number of people have hit that, on and off.
> 
> Yeah, I've been seeing that one.  It should have been fixed with the big
> fat patchset.

Great - fingers crossed.

> > We were close to having a fix, I think, but then we decided that great
> > chunks of sysfs needed rewriting and I believe that we believe that this
> > great rewrite will fix this bug.
> 
> How were we gonna fix it?  If it isn't too complex, I can cook up a
> patch for -stable series.

Do we actually understand the causes?

>  The safest approach I can think of is making
> dentries for attributes unreclaimable but those are made reclaimable for
> good reasons.  :-(

Yeah, that was the google workaround.  It's OK unless you happen to have
thousands of disks on an ia32 box.

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