On 11/26/2013 02:32 AM, Mel Gorman wrote: > On Thu, Nov 21, 2013 at 02:57:18PM -0800, Dave Hansen wrote: >> 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. Sorry for the delay. I lost monster box for a few days... That series didn't look to have much of an effect. Before/after numbers coming out of that open1 test were both ~35M. If it helped, it was in the noise. -- 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>