linux-kernel - Re: 3.10-rc3 xfs mount/recovery failure & ext fsck hang.

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Date:	Tue, 28 May 2013 17:41:37 -0400
From:	Dave Jones <davej@...hat.com>
To:	Dave Chinner <david@...morbit.com>
Cc:	xfs@....sgi.com, Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: 3.10-rc3 xfs mount/recovery failure & ext fsck hang.

On Wed, May 29, 2013 at 07:32:48AM +1000, Dave Chinner wrote:
 > On Tue, May 28, 2013 at 05:15:44PM -0400, Dave Jones wrote:
 > > On Wed, May 29, 2013 at 07:10:12AM +1000, Dave Chinner wrote:
 > >  > On Tue, May 28, 2013 at 12:12:30PM -0400, Dave Jones wrote:
 > >  > > box crashed, and needed rebooting. On next bootup, when it found the dirty partition,
 > >  > > xfs chose to spew and then hang instead of replaying the journal and mounting :(
 > >  > > 
 > >  > > [   14.694731] SGI XFS with ACLs, security attributes, realtime, large block/inode numbers, debug enabled
 > >  > > [   14.722328] XFS (sda2): Mounting Filesystem
 > >  > > [   14.757801] XFS (sda2): Starting recovery (logdev: internal)
 > >  > > [   14.782049] XFS: Assertion failed: fs_is_ok, file: fs/xfs/xfs_dir2_data.c, line: 169
 > >  > 
 > >  > A directory block has an entry that is not in the hash index.
 > >  > Either there's an underlying corruption on disk, or there's an
 > >  > inconsistency in what has been logged and so an entire change has
 > >  > not been replayed. Hence the post recovery verification has thrown a
 > >  > corruption error....
 > >  > 
 > >  > If you haven't already repaired the filesystem, can you send me a
 > >  > metadump of the filesystem in question?
 > > 
 > > Sorry, too late. If I can repro, I'll do so next time.
 > > FYI, I ran xfs_repair and it just hung. Wouldn't even answer ctrl-c.
 > > Rebooted, and then it mounted and recovered just fine!
 > 
 > Strange. I can't think of any reason outside a kernel problem for
 > xfs_repair going into an uninterruptible sleep. Did it happen after
 > the repair completed (i.e. after phase 7)? If so, then closing the
 > block device might have tripped the same problem that fsck.ext2
 > hit....

didn't even get that far. It opened the block dev, and then just sat there.
I left it for a few minutes before deciding it was hung.
And of course, this is an SSD, so there was no way I could tell if there
was any IO going on by sound/feel/lights.

	Dave

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