[OpenAFS] What's the problem with reiser
Derrick Brashear
shadow@gmail.com
Thu, 29 Nov 2007 09:04:20 -0500
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On Nov 29, 2007 8:57 AM, Rob Banz <rob@nofocus.org> wrote:
> >>>
> >>
> >> For a cache partition, at least on other *ixes, the cache partition
> >> has always needed special attention because of the way its used by
> >> the
> >> AFS kernel module. Certain care has to be taken as to do operations
> >> in such a way that kernel deadlocks and such are avoided. For
> >> example, on Solaris you use ufs, however, you can't use logging ufs
> >> because of known deadlock problems.
> >>
> >> I'd assume that the use of ext2 on Linux is for a similar reason.
> >>
> >> -rob
> > Fascinating. I did not know of UFS logging issue on the cache
> > partition.
> > Strangely, I haven't heard of any issues. does ext3 have this issue
> > as well?
>
> I had used logging ufs as a cache partition for years without a
> problem as well -- but in the past couple years ran into deadlocks. I
> remember reliably seeing them under Solaris 10x86 on a Dell 2650 where
> it'd lock up right after AFS started and some automated processes were
> busy trying to access it.
>
For documentation purposes it might be interesting to get kernel backtraces
of those if you ever get bored.
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<br><br><div class="gmail_quote">On Nov 29, 2007 8:57 AM, Rob Banz <<a href="mailto:rob@nofocus.org">rob@nofocus.org</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
>>><br>>><br>>> For a cache partition, at least on other *ixes, the cache partition<br>>> has always needed special attention because of the way its used by<br>>> the<br>>> AFS kernel module. Certain care has to be taken as to do operations
<br>>> in such a way that kernel deadlocks and such are avoided. For<br>>> example, on Solaris you use ufs, however, you can't use logging ufs<br>>> because of known deadlock problems.<br>>><br>
>> I'd assume that the use of ext2 on Linux is for a similar reason.<br>>><br>>> -rob<br>> Fascinating. I did not know of UFS logging issue on the cache<br>> partition.<br>> Strangely, I haven't heard of any issues. does ext3 have this issue
<br>> as well?<br><br>I had used logging ufs as a cache partition for years without a<br>problem as well -- but in the past couple years ran into deadlocks. I<br>remember reliably seeing them under Solaris 10x86 on a Dell 2650 where
<br>it'd lock up right after AFS started and some automated processes were<br>busy trying to access it.<br></blockquote><div><br>For documentation purposes it might be interesting to get kernel backtraces of those if you ever get bored.
<br> <br></div></div><br>
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