From mboxrd@z Thu Jan 1 00:00:00 1970 Message-Id: <200112211155.fBLBtC426481@mailb.telia.com> Content-Type: text/plain; charset="iso-8859-1" From: Roger Larsson Subject: Re: [RFC] Concept: Active/busy "reverse" mapping Date: Fri, 21 Dec 2001 12:52:23 +0100 References: <200112210107.fBL17nL10142@maild.telia.com> <20011220204524.K6276@redhat.com> In-Reply-To: <20011220204524.K6276@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: owner-linux-mm@kvack.org Return-Path: To: Benjamin LaHaise Cc: Rik van Riel , linux-mm@kvack.org List-ID: On Fridayen den 21 December 2001 02.45, Benjamin LaHaise wrote: > On Fri, Dec 21, 2001 at 02:05:26AM +0100, Roger Larsson wrote: > > The goal of this code is to make sure that used pages are marked as such. > > > > This is accomplished by: > > > > * When a process is descheduled - look in its mm for used pages - update > > corresponding page. (Done at most once per tick) > > Interesting. The same effect is acheived by the reverse mapping code on > a global scale while addressing the issue of how to figure out what extent > memory pressure is needed on the page tables. > > -ben There are other ways too... Link all used mm:s and check them with kswapd... etc... etc... It should be possible to optimize away most performance problems... /RogerL PS I will be away for some days... DS -- Roger Larsson Skelleftea Sweden -- 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-mm.org/