Re: [PATCH 2.6.20-rc5 1/1] MM: enhance Linux swap subsystem
From: yunfeng zhang
Date: Thu Feb 22 2007 - 21:31:37 EST
Performance improvement should occur when private pages of multiple processes
are messed up, such as SMP. To UP, my previous mail is done by timer, which only
shows a fact, if pages are messed up fully, current readahead will degrade
remarkably, and unused readaheading pages make a burden to memory subsystem.
You should re-test your testcases following the advises on Linux without my
patch, do normal testcases and select a testcase randomly and record
'/proc/vmstat/pswpin', redo the testcase solely, if the results are close, that
is, your testcases doesn't messed up private pages at all as you expected due to
Linux schedule. Thank you!
2007/2/22, Rik van Riel <riel@xxxxxxxxxx>:
yunfeng zhang wrote:-
> Any comments or suggestions are always welcomed.
Same question as always: what problem are you trying to solve?
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