On 07/17, Dave Chinner wrote: > > On Thu, Jul 16, 2015 at 07:32:56PM +0200, Oleg Nesterov wrote: > > > > #ifdef CONFIG_LOCKDEP > > /* > > * We want lockdep to tell us about possible deadlocks with > > freezing but > > * it's it bit tricky to properly instrument it. Getting a > > freeze protection > > * works as getting a read lock but there are subtle problems. > > XFS for example > > * gets freeze protection on internal level twice in some > > cases, which is OK > > Sorry, I've missed something here - where is XFS nesting > sb_start_intwrite() calls?
Heh ;) I too tried to understand thi but failed. I was not surprized, I know nothing about fs/. Dave, I didn't write this comment. Please look at acquire_freeze_lock(). If we can remove this logic - great! but this needs a separate change. Oleg. -- 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/
