On 04/21/2014 02:24 PM, Dave Hansen wrote: > From: Dave Hansen <[email protected]> > > 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 <[email protected]>
Acked-by: Rik van Riel <[email protected]> -- All rights reversed -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
