Hi Yu Zhao, "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxx> writes: > Not all architecture supports hardware atomic updates of access bits. On > such an arch, we don't use page table walk to classify pages into > generations. Add a kernel config option and remove adding all the page > table walk code on such architecture. > > No preformance change observed with mongodb ycsb test: > > Patch details Throughput(Ops/sec) > without patch 93278 > With patch 93400 > > Without patch: > $ size mm/vmscan.o > text data bss dec hex filename > 112102 42721 40 154863 25cef mm/vmscan.o > > With patch > > $ size mm/vmscan.o > text data bss dec hex filename > 105430 41333 24 146787 23d63 mm/vmscan.o > Any feedback on this patch? Can we look at merging this change? -aneesh
