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Date: Wed, 11 Jan 2012 03:05:19 -0500 From: KOSAKI Motohiro <kosaki.motohiro@...il.com> To: Rik van Riel <riel@...hat.com> Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org, akpm@...ux-foundation.org, Mel Gorman <mel@....ul.ie>, Johannes Weiner <hannes@...xchg.org> Subject: Re: [PATCH -mm] make swapin readahead skip over holes 2012/1/11 KOSAKI Motohiro <kosaki.motohiro@...il.com>: >> Also, I doubt current swap_cluster default is best value on nowadays. > > I meant, current average hdd spec is, > - average seek time: 8.5ms > - sequential access performance: about 60MB/sec > > so, we can eat free lunch up to 7MB ~= 60(MB/sec) * 1000 / 8.5(ms). Bah! I'm moron. the correct fomura is, 500KB = 60(MB/sec) / 1000(msec/ssec) *8.5 (ms) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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