On 10/11/2011 04:54 PM, Andrew Morton wrote: > On Tue, 11 Oct 2011 16:23:22 -0400 > Satoru Moriya <satoru.moriya@xxxxxxx> wrote: > >> Also, if we increase the free-page reserves a.k.a min_free_kbytes, >> the possibility of direct reclaim on other workloads increases. >> I think it's a bad side effect. > > extra_free_kbytes has the same side-effect. I don't think so. If we make low watermark bigger to increase free-page reserves by extra_free_kbytes, the possibility of direct reclaim on other workload does not increase directly because min watermark is not changed. Of course, as David pointed out, other workloads may incur a regression because kswapd uses more cpu time. Thanks, Satoru -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href