Re: ext2 errors w/2.5.x

["David S. Miller" <davem@redhat.com>]

   From: Andrew Morton <akpm@zip.com.au>
   Date: Mon, 17 Jun 2002 21:15:46 -0700

   Andreas Dilger wrote:
   > On Jun 17, 2002  19:56 -0700, David S. Miller wrote:
   > > EXT2-fs error (device sd(8,17)): ext2_find_entry: zero-length directory entry
   > 
   > This would appear to be from accessing a buffer (page) which has not yet
   > been read from disk.  Otherwise you would have an error from e2fsck also.
   > Andrew has been mucking the most in this area...

   Not that, I hope.  Possibly it's the interaction between
   block_write_full_pages's memset outside i_size, truncate and lookup.
   It took me a ridiculous amount of time to get that "correct", so
   it's a suspicion point.   Or possibly locking between lookup and
   truncate (rmdir) and/or creat.
   
   Dave, I assume this is with 8k pages and 4k blocks?
   
Yes, that is the case here.

   Is it repeatable enough to conduct a little experiment?  Like, lock the page
   in ext2_find_entry?
   
I'll try out your patch and get back to you, thanks.

Franks a lot,
David S. Miller
davem@redhat.com