Author: Dave Chinner Date: To: Eric Sandeen CC: Oliver Pinter, xfs Subject: Re: XFS errors / BUG / panic, with 2.6.25.7-queue (and older
2.6.25.y)
On Sun, Jun 15, 2008 at 10:58:09AM -0500, Eric Sandeen wrote: > Oliver Pinter wrote:
> > this mistake shutdownkor comes out, remount launched because he
> > panics, only Alt+Sysrq+foo works
>
> I'm not sure I follow.
>
> Assuming that :
> http://students.zipernowsky.hu/~oliverp/upload/xfs_error/dsc00775.jpg >
> is the first event of interest, it is hitting an assertion on the
> remount path:
>
> ASSERT_ALWAYS(atomic_read(&mp->m_active_trans) == 0);
>
> in xfs_attr_quiesce.
That's caused by a race condition in the VFS w.r.t setting the MS_RDONLY
flag. It should be fixed in 2.6.26.
&References=20080616045221.GJ3700@disturbed&In-Reply-To=20080616045221.GJ3700@disturbed&Body=On%202008-06-16%2004:52,%20Dave%20Chinner%20wrote:%0A>%20On%20Sun,%20Jun%2015,%202008%20at%2010:58:09AM%20-0500,%20Eric%20Sandeen%20wrote:%0A>%20>%20Oliver%20Pinter%20wrote:%0A>%20>%20>%20this%20mistake%20shutdownkor%20comes%20out,%20remount%20launched%20because%20he%0A>%20>%20>%20panics,%20only%20Alt+Sysrq+foo%20works%0A>%20>%20%0A>%20>%20I'm%20not%20sure%20I%20follow.%0A>%20>%20%0A>%20>%20Assuming%20that%20:%0A>%20>%20http://students.zipernowsky.hu/~oliverp/upload/xfs_error/dsc00775.jpg%0A>%20>%20%0A>%20>%20is%20the%20first%20event%20of%20interest,%20it%20is%20hitting%20an%20assertion%20on%20the%0A>%20>%20remount%20path:%0A>%20>%20%0A>%20>%20%20%20%20%20%20%20%20%20ASSERT_ALWAYS(atomic_read(&mp->m_active_trans)%20==%200);%0A>%20>%20%0A>%20>%20in%20xfs_attr_quiesce.%0A>%20%0A>%20That's%20caused%20by%20a%20race%20condition%20in%20the%20VFS%20w.r.t%20setting%20the%20MS_RDONLY%0A>%20flag.%20It%20should%20be%20fixed%20in%202.6.26.%0A>%20%0A>%20Cheers,%0A>%20%0A>%20Dave.%0A>%20%0A>%20%0A>%20%0A>%20 "Reply to this message")
