On 04/21/2014 02:24 PM, Dave Hansen wrote: > From: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> > > We don't have any good way to figure out what kinds of flushes > are being attempted. Right now, we can try to use the vm > counters, but those only tell us what we actually did with the > hardware (one-by-one vs full) and don't tell us what was actually > _requested_. > > This allows us to select out "interesting" TLB flushes that we > might want to optimize (like the ranged ones) and ignore the ones > that we have very little control over (the ones at context > switch). > > Also, since we have a pair of tracepoint calls in > flush_tlb_mm_range(), we can time the deltas between them to make > sure that we got the "invlpg vs. global flush" balance correct in > practice. > > Signed-off-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> Acked-by: Rik van Riel <riel@xxxxxxxxxx> -- All rights reversed -- 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>