On (05/09/16 14:01), Minchan Kim wrote: [..] > > no, we need cltd there. but ZS_MAX_PAGES_PER_ZSPAGE also affects > > ZS_MIN_ALLOC_SIZE, which is used in several places, like > > get_size_class_index(). that's why ZS_MAX_PAGES_PER_ZSPAGE data > > type change `improves' zs_malloc(). > > Why not if such simple improves zsmalloc? :) > Please send a patch. > > Thanks a lot, Sergey! Hello Minchan, sorry for long reply, I decided to investigate it a bit further. with this patch, gcc 6.1 -O2 generates "+13" instructions more, -Os "-25" instructions less. this +13 ins case is a no-no-no. -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>