From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Sat, 12 May 2001 10:21:28 -0700 (PDT) From: Matt Dillon Message-Id: <200105121721.f4CHLSS18553@earth.backplane.com> Subject: Re: on load control / process swapping References: Sender: owner-linux-mm@kvack.org Return-Path: To: Rik van Riel Cc: arch@freebsd.org, linux-mm@kvack.org, sfkaplan@cs.amherst.edu List-ID: : :Ahhh, so FreeBSD _does_ have a maxscan equivalent, just one that :only kicks in when the system is under very heavy memory pressure. : :That explains why FreeBSD's thrashing detection code works... ;) : :(I'm not convinced, though, that limiting the speed at which we :scan the active list is a good thing. There are some arguments :in favour of speed limiting, but it mostly seems to come down :to a short-cut to thrashing detection...) Note that there is a big distinction between limiting the page queue scan rate (which we do not do), and sleeping between full scans (which we do). Limiting the page queue scan rate on a page-by-page basis does not scale. Sleeping in between full queue scans (in an extreme case) does scale. -Matt -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux.eu.org/Linux-MM/