From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx153.postini.com [74.125.245.153]) by kanga.kvack.org (Postfix) with SMTP id 2D65E6B005D for ; Mon, 19 Dec 2011 13:38:15 -0500 (EST) From: Naoya Horiguchi Subject: [RFC][PATCH 3/3] pagemap: document KPF_THP and show make page-types aware of it Date: Mon, 19 Dec 2011 13:38:39 -0500 Message-Id: <1324319919-31720-4-git-send-email-n-horiguchi@ah.jp.nec.com> In-Reply-To: <1324319919-31720-1-git-send-email-n-horiguchi@ah.jp.nec.com> References: <1324319919-31720-1-git-send-email-n-horiguchi@ah.jp.nec.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org Cc: Andi Kleen , Wu Fengguang , Andrea Arcangeli , KOSAKI Motohiro , KAMEZAWA Hiroyuki , linux-kernel@vger.kernel.org, Naoya Horiguchi page-types, which is a common user of pagemap, gets aware of thp with this patch. This helps system admins and kernel hackers to know about how thp works. Here is a sample output of page-types over a thp: voffset offset len flags ... 7f9d40200 3fd200 1 ___U_lA____Ma_b_______t____________ 7f9d40201 3fd201 1ff ______________________t____________ ... flags page-count MB symbolic-flags long-symbolic-flags 0x0000000000400000 511 1 ______________________t____________ thp 0x0000000000405868 1 0 ___U_lA____Ma_b_______t____________ uptodate,lru,active,mmap,anonymous,swapbacked,thp Signed-off-by: Naoya Horiguchi --- Documentation/vm/page-types.c | 2 ++ Documentation/vm/pagemap.txt | 4 ++++ 2 files changed, 6 insertions(+), 0 deletions(-) diff --git 3.2-rc5.orig/Documentation/vm/page-types.c 3.2-rc5/Documentation/vm/page-types.c index 7445caa..0b13f02 100644 --- 3.2-rc5.orig/Documentation/vm/page-types.c +++ 3.2-rc5/Documentation/vm/page-types.c @@ -98,6 +98,7 @@ #define KPF_HWPOISON 19 #define KPF_NOPAGE 20 #define KPF_KSM 21 +#define KPF_THP 22 /* [32-] kernel hacking assistances */ #define KPF_RESERVED 32 @@ -147,6 +148,7 @@ static const char *page_flag_names[] = { [KPF_HWPOISON] = "X:hwpoison", [KPF_NOPAGE] = "n:nopage", [KPF_KSM] = "x:ksm", + [KPF_THP] = "t:thp", [KPF_RESERVED] = "r:reserved", [KPF_MLOCKED] = "m:mlocked", diff --git 3.2-rc5.orig/Documentation/vm/pagemap.txt 3.2-rc5/Documentation/vm/pagemap.txt index df09b96..666d12b 100644 --- 3.2-rc5.orig/Documentation/vm/pagemap.txt +++ 3.2-rc5/Documentation/vm/pagemap.txt @@ -60,6 +60,7 @@ There are three components to pagemap: 19. HWPOISON 20. NOPAGE 21. KSM + 22. THP Short descriptions to the page flags: @@ -97,6 +98,9 @@ Short descriptions to the page flags: 21. KSM identical memory pages dynamically shared between one or more processes +22. THP + continuous pages which construct transparent hugepages + [IO related page flags] 1. ERROR IO error occurred 3. UPTODATE page has up-to-date data -- 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