On Wed, 2011-04-27 at 12:33 -0400, Chris Mason wrote: > Probably easier to debug with a sysrq-l and sysrq-w. Yes, just enabling them for the repro ... I didn't echo 1 > /proc/sys/kernel/sysrq first time around > If you get stuck > on the filesystem, it is probably waiting on ram, which it probably > can't get because kswapd is spinning. Eventually everyone backs up > waiting for the transaction that never ends. If we're really lucky it > is just GFP_KERNEL where it should NOFS. > > Since you're often stuck in different spots inside shrink_slab, we're > probably not stuck on a lock. But, trying with lock debugging, lockdep > enabled and preempt on is a good idea to rule out locking mistakes. > > Does the fedora debug kernel enable preempt? No ... I've taken the Fedora 15 kernel config directly from their install CD for this (with a bit of munging to get it to work on -rc4) James -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>