On Wed, Nov 08, 2006 at 07:27:22PM +1100, David Chinner wrote: > But it's trivial to detect this condition - if (sb->s_frozen != SB_UNFROZEN) > then the filesystem is already frozen and you shouldn't try to freeze > it again. It's simple to do, and the whole problem then just goes away.... So is that another vote in support of explicitly supporting multiple concurrent freeze requests, letting them all succeed, and only thawing after the last one has requested its thaw? (It's not enough just to check SB_UNFROZEN - also need to track whether any other outstanding requests to avoid risk of it getting unfrozen while something independent believes it still to be frozen.) Alasdair -- agk@xxxxxxxxxx -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
