From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932940Ab0JFUtS (ORCPT ); Wed, 6 Oct 2010 16:49:18 -0400 Received: from one.firstfloor.org ([213.235.205.2]:37494 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932678Ab0JFUtP (ORCPT ); Wed, 6 Oct 2010 16:49:15 -0400 From: Andi Kleen To: linux-kernel@vger.kernel.org Cc: fengguang.wu@intel.com, linux-mm@kvack.org, Andi Kleen Subject: [PATCH 4/4] HWPOISON: Stop shrinking at right page count Date: Wed, 6 Oct 2010 22:49:01 +0200 Message-Id: <1286398141-13749-5-git-send-email-andi@firstfloor.org> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1286398141-13749-1-git-send-email-andi@firstfloor.org> References: <1286398141-13749-1-git-send-email-andi@firstfloor.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andi Kleen When we call the slab shrinker to free a page we need to stop at page count one because the caller always holds a single reference, not zero. This avoids useless looping over slab shrinkers and freeing too much memory. Signed-off-by: Andi Kleen --- mm/memory-failure.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 886144b..7c1af9b 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -237,7 +237,7 @@ void shake_page(struct page *p, int access) int nr; do { nr = shrink_slab(1000, GFP_KERNEL, 1000); - if (page_count(p) == 0) + if (page_count(p) == 1) break; } while (nr > 10); } -- 1.7.1