From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759891AbZE0UMk (ORCPT ); Wed, 27 May 2009 16:12:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755749AbZE0UMa (ORCPT ); Wed, 27 May 2009 16:12:30 -0400 Received: from one.firstfloor.org ([213.235.205.2]:35897 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754583AbZE0UM3 (ORCPT ); Wed, 27 May 2009 16:12:29 -0400 From: Andi Kleen References: <200905271012.668777061@firstfloor.org> In-Reply-To: <200905271012.668777061@firstfloor.org> To: fengguang.wu@intel.com, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, fengguang.wu@intel.com Subject: [PATCH] [2/16] HWPOISON: Export poison flag in /proc/kpageflags Message-Id: <20090527201227.EAEC41D0286@basil.firstfloor.org> Date: Wed, 27 May 2009 22:12:27 +0200 (CEST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Fengguang Wu Export the new poison flag in /proc/kpageflags. Poisoned pages are moderately interesting even for administrators, so export them here. Also useful for debugging. AK: I extracted this out of a larger patch from Fengguang Wu. Signed-off-by: Andi Kleen --- fs/proc/page.c | 4 ++++ 1 file changed, 4 insertions(+) Index: linux/fs/proc/page.c =================================================================== --- linux.orig/fs/proc/page.c 2009-05-27 21:13:54.000000000 +0200 +++ linux/fs/proc/page.c 2009-05-27 21:14:21.000000000 +0200 @@ -79,6 +79,7 @@ #define KPF_WRITEBACK 8 #define KPF_RECLAIM 9 #define KPF_BUDDY 10 +#define KPF_HWPOISON 11 #define kpf_copy_bit(flags, dstpos, srcpos) (((flags >> srcpos) & 1) << dstpos) @@ -118,6 +119,9 @@ kpf_copy_bit(kflags, KPF_WRITEBACK, PG_writeback) | kpf_copy_bit(kflags, KPF_RECLAIM, PG_reclaim) | kpf_copy_bit(kflags, KPF_BUDDY, PG_buddy); +#ifdef CONFIG_MEMORY_FAILURE + uflags |= kpf_copy_bit(kflags, KPF_HWPOISON, PG_hwpoison); +#endif if (put_user(uflags, out++)) { ret = -EFAULT;