Re: 2.6.15-git7 oopses in ext3 during LTP runs II - more problems

[Andi Kleen <ak@suse.de>]

On Wednesday 11 January 2006 22:27, Arjan van de Ven wrote:
> > 15/fs/ext3/super.c~	2006-01-11 21:54:13.000000000 +0100
> > > +++ linux-2.6.15/fs/ext3/super.c	2006-01-11 21:54:13.000000000 +0100
> > > @@ -2150,7 +2150,7 @@
> > >  
> > >  static void ext3_write_super (struct super_block * sb)
> > >  {
> > > -	if (mutex_trylock(&sb->s_lock) != 0)
> > > +	if (!mutex_trylock(&sb->s_lock) != 0)
> > >  		BUG();
> > >  	sb->s_dirt = 0;
> > >  }
> > 
> > We expect the lock to be held on entry.  Hence we expect mutex_trylock()
> > to return zero.
> 
> you are correct, and the x86-64 mutex.h is buggy

While this patch seemed  to fix LTP my desktop running the same kernel (with 
mutex fix) hung the mailer while sending an unrelated mail. Again on ext3.

I unfortunately don't have the backtraces anymore because I couldn't
save them to disk before the reboot (and forgot to copy them
to another system sorry), but they were also hanging in some JBD/ext3
functions in D, with all disk accesses hanging.

So things appear to be still broken in ext3 land.

-Andi