On Wed, 2012-07-18 at 07:30 +0200, Mike Galbraith wrote: > On Wed, 2012-07-18 at 06:44 +0200, Mike Galbraith wrote: > > > The patch in question for missing Cc. Maybe should be only mutex, but I > > see no reason why IO dependency can only possibly exist for mutexes... > > Well that was easy, box quickly said "nope, mutex only does NOT cut it".
And I also learned (ouch) that both doesn't cut it either. Ksoftirqd (or sirq-blk) being nailed by q->lock in blk_done_softirq() is.. not particularly wonderful. As long as that doesn't happen, IO deadlock doesn't happen, troublesome filesystems just work. If it does happen though, you've instantly got a problem. -Mike -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
