From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx176.postini.com [74.125.245.176]) by kanga.kvack.org (Postfix) with SMTP id 9464B6B005C for ; Wed, 21 Dec 2011 17:20:39 -0500 (EST) From: Naoya Horiguchi Subject: [PATCH 3/4] pagemap: export KPF_THP Date: Wed, 21 Dec 2011 17:23:47 -0500 Message-Id: <1324506228-18327-4-git-send-email-n-horiguchi@ah.jp.nec.com> In-Reply-To: <1324506228-18327-1-git-send-email-n-horiguchi@ah.jp.nec.com> References: <1324506228-18327-1-git-send-email-n-horiguchi@ah.jp.nec.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org Cc: Andrew Morton , David Rientjes , Andi Kleen , Wu Fengguang , Andrea Arcangeli , KOSAKI Motohiro , KAMEZAWA Hiroyuki , linux-kernel@vger.kernel.org, Naoya Horiguchi This flag shows that a given pages is a subpage of transparent hugepage. It helps us debug and test kernel by showing physical address of thp. Signed-off-by: Naoya Horiguchi Nacked-by: KOSAKI Motohiro Reviewed-by: Wu Fengguang Changes since v1: - remove unnecessary ifdefs - fix confusing patch description --- fs/proc/page.c | 2 ++ include/linux/kernel-page-flags.h | 1 + 2 files changed, 3 insertions(+), 0 deletions(-) diff --git 3.2-rc5.orig/fs/proc/page.c 3.2-rc5/fs/proc/page.c index 6d8e6a9..cb2dcea 100644 --- 3.2-rc5.orig/fs/proc/page.c +++ 3.2-rc5/fs/proc/page.c @@ -115,6 +115,8 @@ u64 stable_page_flags(struct page *page) u |= 1 << KPF_COMPOUND_TAIL; if (PageHuge(page)) u |= 1 << KPF_HUGE; + if (PageTransCompound(page)) + u |= 1 << KPF_THP; /* * Caveats on high order pages: page->_count will only be set diff --git 3.2-rc5.orig/include/linux/kernel-page-flags.h 3.2-rc5/include/linux/kernel-page-flags.h index bd92a89..26a6571 100644 --- 3.2-rc5.orig/include/linux/kernel-page-flags.h +++ 3.2-rc5/include/linux/kernel-page-flags.h @@ -30,6 +30,7 @@ #define KPF_NOPAGE 20 #define KPF_KSM 21 +#define KPF_THP 22 /* kernel hacking assistances * WARNING: subject to change, never rely on them! -- 1.7.7.3 -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org