articlemmap produces bad pmd

"Miquel van Smoorenburg" list-inn-workers at news.cistron.nl
Sun Feb 8 21:12:23 UTC 2004


In article <Pine.LNX.4.55.0402081303020.10424 at td.office.support.nl>,
Patrick Schreurs  <patricks at support.nl> wrote:
>Hi all,
>
>The following problem looks like a kernel bug, but i would
>like to have your opinion.
>
>One of our binary servers is running inn 2.4.2 (20040108 CVS)
>on a debian linux with kernel version 2.4.22 with xfs patches.
>
>When we set articlemmap on true, this server becomes very
>unstable and logs this kind of errors:
>
>Jan 26 22:19:26 news8 kernel: filemap.c:2170: bad pmd 0b4001e3.
>
>The server is stable with articlemmap on false.
>
>nnrpd is running as daemon. We use cnfs with tradindexed overview.
>
>Some more detailed logging from kern.log:
>
>Feb  3 00:48:39 news8 kernel: filemap.c:2170: bad pmd 044001e3.
>Feb  3 00:48:40 news8 kernel: Unable to handle kernel paging request at
>virtual address c4668680
>Feb  3 00:48:40 news8 kernel:  printing eip:
>Feb  3 00:48:40 news8 kernel: c025a839
>Feb  3 00:48:40 news8 kernel: *pde = 044001e3
>Feb  3 00:48:40 news8 kernel: *pte = 00000000
>Feb  3 00:48:40 news8 kernel: Oops: 0002

These kind of messages (oopsen) are _always_ kernel bugs. 2.4.22
is an older kernel though, and the XFS patches might be out of
date as well. Marcelo (the 2.4 maintainer) merged XFS into
the 2.4 series in 2.4.25, which hasn't been released yet but
2.4.25-rc1 has been released a couple of days yet. Get 2.4.25-rc1
from ftp.kernel.org and see if you can reproduce the problem.
If so, the people at linux-xfs at oss.sgi.com are probably interested
in your bug report.

Mike.

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