linux-kernel - Re: futex strangeness in 2.6.23-mm1/UML

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Message-Id: <E1Ik4Ch-000273-00@dorka.pomaz.szeredi.hu>
Date:	Mon, 22 Oct 2007 22:48:51 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	riel@...hat.com
CC:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	xemul@...nvz.org
Subject: Re: futex strangeness in 2.6.23-mm1/UML

> > I'm getting a process stuck in pthread_rwlock_wrlock(), even though it
> > looks like the lock is not held by anybody.
> > 
> > I think the last -mm was OK.  Any ideas?
> > 
> > If not, I'll go searching for the offending patch.
> 
> I wonder if that's the same bug that's breaking autofs for me.

Probably.

> Oct 22 14:39:01 kenny automount[2299]: cache_readlock: mapent cache
> rwlock lock failed
> Oct 22 14:39:01 kenny automount[2299]: unexpected pthreads error: 11 at
> 65 in cache.c
> 
> I'm bisecting 2.6.23-mm1 today to find the problem patch, with
> some luck I'll have it this afternoon.
> 
> With the series applied up to whitespace-fixes-task-exit-handling.patch
> things work.
> 
> It breaks before kswapd-should-only-wait-on-io-if-there-is-io.patch
> 
> That leaves only about 60-80 patches to look at :)

OK, the first patch that breaks something for me is:

  pid-namespaces-move-alloc_pid-lower-in-copy_process.patch

Miklos
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