On 06/25/2012 06:01 PM, Konrad Rzeszutek Wilk wrote: > On Mon, Jun 25, 2012 at 12:14 PM, Seth Jennings > <sjenning@xxxxxxxxxxxxxxxxxx> wrote: >> This patch adds support for a local_tlb_flush_kernel_range() >> function for the x86 arch. This function allows for CPU-local >> TLB flushing, potentially using invlpg for single entry flushing, >> using an arch independent function name. > > What x86 hardware did you use to figure the optimal number? Actually I didn't. I used Alex Shi's numbers. https://lkml.org/lkml/2012/6/25/39 "Like some machine in my hands, balance points is 16 entries on Romely-EP; while it is at 8 entries on Bloomfield NHM-EP; and is 256 on IVB mobile CPU. but on model 15 core2 Xeon using invlpg has nothing help. For untested machine, do a conservative optimization, same as NHM CPU." -- Seth -- 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>