On Wed, Apr 20, 2011 at 03:38:22PM +0800, Wu Fengguang wrote: > > make. Please test against a vanilla kernel if that is what you are > > aiming these patches for. If you aren't aiming for a vanilla kernel, > > please say so in the patch series header... > > Here are the test results for vanilla kernel. It's again shows better > numbers for dd, tar and overall run time. > > 2.6.39-rc3 2.6.39-rc3-dyn-expire+ > ------------------------------------------------ > all elapsed 256.043 252.367 > stddev 24.381 12.530 > > tar elapsed 30.097 28.808 > dd elapsed 13.214 11.782 The big reduction in run-to-run variance is very convincing - moreso than the reduction in runtime - That's kind of what I had hoped would occur once I understood the implications of the change. Thanks for running the test to close the loop. :) Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>