On Sun, Oct 14, 2007 at 08:42:34PM -0700, Jeremy Fitzhardinge wrote: > Nick Piggin wrote: > > That's not going to > > happen for at least a cycle or two though, so in the meantime maybe > > an ifdef for that XFS vmap batching code would help? > > > > For now I've proposed a patch to simply eagerly vunmap everything when > CONFIG_XEN is set. It certainly works, but I don't have a good feel for > how much of a performance hit that imposes on XFS.
With defaults - little effect as vmap should never be used. It's only when you start using larger block sizes for metadata that this becomes an issue. The CONFIG_XEN workaround should be fine until we get a proper vmap cache.... Cheers, Dave. -- Dave Chinner Principal Engineer SGI Australian Software Group - 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/
