On Wed, Feb 20, 2008 at 11:39:42AM +0100, Andrea Arcangeli wrote: > XPMEM simply can't use RCU for the registration locking if it wants to > schedule inside the mmu notifier calls. So I guess it's better to add
Whoa there. In Christoph's patch, we did not use rcu for the list. It was a simple hlist_head. The list manipulations were done under down_write(¤t->mm->mmap_sem) and would therefore not be racy. All the callout locations are already acquiring the mmap_sem at least readably, so we should be safe. Maybe I missed a race somewhere. Thanks, Robin -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/