Hey, On Thu, Apr 28, 2011 at 09:52:35AM -0500, Christoph Lameter wrote: > On Thu, 28 Apr 2011, Tejun Heo wrote: > > > Eh? Are you saying the above can't happen or the above doesn't > > matter? > > Its an artificial use case that does not reflect the realities on how > these counters are typically used. Gees, Christoph. That is a test case to show the issue prominently, which is what a test case is supposed to do. What it means is that _any_ update can trigger @batch deviation on _sum() regardless of its frequency or concurrency level and that's the nastiness I've been talking about over and over again. For fast path, sure. For slow path, I don't think so. If the tradeoff still doesn't make sense to you, I don't know how to persuade you guys. I'm not gonna take it. You and Shaohua are welcome to go over my head and send the changes to Andrew or Linus, but please keep me cc'd so that I can voice my objection. Thank you. -- tejun -- 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>