On Sun, Aug 07, 2016 at 11:56:34PM -0400, Theodore Ts'o wrote: > On Fri, Aug 05, 2016 at 12:15:48PM -0700, Darrick J. Wong wrote: > > > > [1] > > > > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/fs/ext4/inode.c?id=b47820edd1634dc1208f9212b7ecfb4230610a23 > > > > > > I added the patch, rebuilt and rebooted. It will take some time > > > before I'll report back since the issue is so hard to reproduce. > > > > FWIW I could trigger it reliably by running a bunch of directory traversal > > programs simultaneously on the same directory. I have a script that fires > > up multiple mutts pointing to the Maildirs for the high traffic Linux lists. > > Hmm, I wonder if we should request that this patch be backported to > -stable. Darrick, what do you think?
Seems like an excellent idea. I have one lingering concern -- is it a bug that two processes could be computing the checksum of a buffer simultaneously? I would have thought ext4 would serialize that kind of buffer_head access... --D > > - Ted
