On (03/14/16 16:41), Sergey Senozhatsky wrote: [..] > you mean that __zs_compact() instead of just checking per-class > zs_can_compact() should check global pool ratio and bail out if > compaction of class Z has dropped the overall fragmentation ratio > below some watermark? > > my logic was that > -- suppose we have class A with fragmentation ratio 49% and class B > with 8% of wasted pages, so the overall pool fragmentation is > (50 + 10)/ 2 < 30%, while we still have almost 50% fragmented class. "(49 + 8) / 2 < 30%" -ss -- 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>