From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Mon, 8 Nov 2004 16:18:21 -0200 From: Marcelo Tosatti Subject: [PATCH] ignore referenced pages on reclaim when OOM Message-ID: <20041108181821.GA3236@logos.cnet> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Sender: owner-linux-mm@kvack.org Return-Path: To: akpm@osdl.org, riel@redhat.com Cc: linux-mm@kvack.org List-ID: Andrew, Can you please apply Rik's patch? Ignore referenced bit when priority reaches 0. Get out of such OOM situation as fast as possible, instead of running around trying to find elegible pages for reclaim. Speeds up extreme load performance on Rik's tests. ----- Forwarded message from Rik van Riel ----- From: Rik van Riel Date: Fri, 5 Nov 2004 16:56:17 -0500 (EST) To: Marcelo Tosatti Subject: [PATCH] fix OOM problem X-X-Sender: riel@chimarrao.boston.redhat.com X-MIMETrack: Itemize by SMTP Server on USMail/Cyclades(Release 6.5.1|January 21, 2004) at 11/05/2004 13:58:40 ===== mm/vmscan.c 1.231 vs edited ===== --- 1.231/mm/vmscan.c Sun Oct 17 01:07:24 2004 +++ edited/mm/vmscan.c Mon Oct 25 17:38:56 2004 @@ -379,7 +379,7 @@ referenced = page_referenced(page, 1); /* In active use or really unfreeable? Activate it. */ - if (referenced && page_mapping_inuse(page)) + if (referenced && sc->priority && page_mapping_inuse(page)) goto activate_locked; #ifdef CONFIG_SWAP @@ -715,7 +715,7 @@ if (page_mapped(page)) { if (!reclaim_mapped || (total_swap_pages == 0 && PageAnon(page)) || - page_referenced(page, 0)) { + (page_referenced(page, 0) && sc->priority)) { list_add(&page->lru, &l_active); continue; } -- 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/ . Don't email: aart@kvack.org