On Thu, Nov 21, 2013 at 02:57:18PM -0800, Dave Hansen wrote: > Hey Johannes, > > I'm running an open/close microbenchmark from the will-it-scale set: > > https://github.com/antonblanchard/will-it-scale/blob/master/tests/open1.c > > I was seeing some weird symptoms on 3.12 vs 3.11. The throughput in > that test was going from down from 50 million to 35 million. > > The profiles show an increase in cpu time in _raw_spin_lock_irq. The > profiles pointed to slub code that hasn't been touched in quite a while. > I bisected it down to: > Dave, do you mind retesting this against "[RFC PATCH 0/5] Memory compaction efficiency improvements" please? I have not finished reviewing the series yet but patch 3 mentions lower allocation success rates with Johannes' patch and notes that it is unlikely to be a bug with the patch itself. -- Mel Gorman SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>