From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail191.messagelabs.com (mail191.messagelabs.com [216.82.242.19]) by kanga.kvack.org (Postfix) with ESMTP id 682F55F0040 for ; Thu, 21 Oct 2010 16:36:56 -0400 (EDT) Date: Thu, 21 Oct 2010 13:36:36 -0700 From: Andrew Morton Subject: Re: vmscan: Do not run shrinkers for zones other than ZONE_NORMAL Message-Id: <20101021133636.68979e37.akpm@linux-foundation.org> In-Reply-To: References: <20101021124054.14b85e50.akpm@linux-foundation.org> <20101021131428.f2f7214a.akpm@linux-foundation.org> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Christoph Lameter Cc: npiggin@kernel.dk, Pekka Enberg , David Rientjes , linux-mm@kvack.org, Andi Kleen List-ID: On Thu, 21 Oct 2010 15:28:35 -0500 (CDT) Christoph Lameter wrote: > On Thu, 21 Oct 2010, Andrew Morton wrote: > > > The patch changes balance_pgdat() to not shrink slab when inspecting > > the highmem zone. It will therefore change zone balancing behaviour on > > a humble 1G laptop, will it not? > > It will avoid a slab shrink call on the HIGHMEM zone that will put useless > pressure on the cache objects in ZONE_NORMAL and ZONE_DMA. There will have > been already shrinker calls for ZONE_DMA and ZONE_NORMAL before. This is > going to be the third round.... > Right, it changes behaviour for modest machines. Apparently accidentally. Is the new behaviour better, or worse? -- 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