> Good spot that certainly isn't plain .39. True. > > It looks like those (http://marc.info/?l=linux-mm&m=130533041726258) are > similar to Linus' patch, except Linus takes the hard line that the root One difference to Linus' patch is that it does batching for both fork+exit. I suspect Linus' patch could probably too. But the fork+exit patch only improved things slightly, it's very unlikely to recover 52%. Maybe the overall locking here needs to be revisited. And in general it looks like blind conversion from spinlock to mutex is a bad idea right now. -Andi -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>