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SubjectRe: 2.6.23-mm1 - autofs broken
On Sat, 2007-10-20 at 01:13 -0400, Rik van Riel wrote:
> On Thu, 11 Oct 2007 21:31:26 -0700
> Andrew Morton <> wrote:
> >
> >
> >
> > - I've been largely avoiding applying anything since rc8-mm2 in an
> > attempt to stabilise things for the 2.6.23 merge.
> Between rc8-mm2 and 2.6.23-mm1, autofs stopped working in the
> -mm kernel.
> Instead of mounting my home directory, I get these messages in
> /var/log/messages:
> Oct 20 00:38:52 kenny automount[2293]: cache_readlock: mapent cache
> rwlock lock failed

This is quite strange, normally it should never fail and, in all the
time version 5 has been available the maximum number of read locks has
never been exceeded.

Is there anything unusual going on like a server down causing autofs to
issue a number of mounts that are all waiting to time out?

> Oct 20 00:38:52 kenny automount[2293]: unexpected pthreads error: 11 at
> 65 in cache.c

Mmm .. if this is a genuine autofs issue maybe I need to handle EAGAIN
returns but that would mean blocking which probably isn't good and I'd
rather not if we can avoid it.

> I am not sure if this is due to autofs changes or changes in some other
> code that was merged. If you can think of any suspicious change that
> I should test, please let me know.

Is there anything in the log, an autofs4 kernel trace perhaps?


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