On Sun, Apr 04, 2010 at 03:47:29PM +0200, Pavel Machek wrote: > > Yes, but ext3 does not enable barriers by default (the patch has been > > submitted but akpm has balked because he doesn't like the performance > > degredation and doesn't believe that Chris Mason's "workload of doom" > > is a common case). Note though that it is possible for dirty blocks > > to remain in the track buffer for *minutes* without being written to > > spinning rust platters without a barrier. > > So we do wrong thing by default. Another reason to do fsck more often > when powerfails are present? Or migrate to ext4, which does use barriers by defaults, as well as journal-level checksumming. :-) As far as changing the default to enable barriers for ext3, you'll need to talk to akpm about that; he's the one who has been against it in the past. - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
