From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 19 Dec 2007 09:53:07 -0500 From: Rik van Riel Subject: Re: [patch 17/20] non-reclaimable mlocked pages Message-ID: <20071219095307.683978b0@cuia.boston.redhat.com> In-Reply-To: <1198074247.6484.17.camel@twins> References: <20071218211539.250334036@redhat.com> <20071218211550.186819416@redhat.com> <200712191156.48507.nickpiggin@yahoo.com.au> <20071219084534.4fee8718@bree.surriel.com> <1198074247.6484.17.camel@twins> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Peter Zijlstra Cc: Nick Piggin , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Lee Schermerhorn List-ID: On Wed, 19 Dec 2007 15:24:07 +0100 Peter Zijlstra wrote: > I thought Lee had patches that moved pages with long rmap chains (both > anon and file) out onto the non-reclaim list, for those a slow > background scan does make sense. I suspect we won't be needing that code. The SEQ replacement for swap backed pages might reduce the number of pages that need to be scanned to a reasonable number. Remember, steady states are not a big problem with the current VM. It's the sudden burst of scanning that happens when the VM decides that it should start swapping (and every anonymous page is referenced) that kills large systems. -- All Rights Reversed -- 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: email@kvack.org