From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx204.postini.com [74.125.245.204]) by kanga.kvack.org (Postfix) with SMTP id 8AD6C6B13F2 for ; Wed, 8 Feb 2012 10:52:48 -0500 (EST) From: Naoya Horiguchi Subject: [PATCH 4/6] pagemap: document KPF_THP and make page-types aware of it Date: Wed, 8 Feb 2012 10:51:40 -0500 Message-Id: <1328716302-16871-5-git-send-email-n-horiguchi@ah.jp.nec.com> In-Reply-To: <1328716302-16871-1-git-send-email-n-horiguchi@ah.jp.nec.com> References: <1328716302-16871-1-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 page-types, which is a common user of pagemap, gets aware of thp with this patch. This helps system admins and kernel hackers know about how thp works. Here is a sample output of page-types over a thp: $ page-types -p --raw --list voffset offset len flags ... 7f9d40200 3f8400 1 ___U_lA____Ma_bH______t____________ 7f9d40201 3f8401 1ff ________________T_____t____________ flags page-count MB symbolic-flags long-symbolic-flags 0x0000000000410000 511 1 ________________T_____t____________ compound_tail,thp 0x000000000040d868 1 0 ___U_lA____Ma_bH______t____________ uptodate,lru,active,mmap,anonymous,swapbacked,compound_head,thp Signed-off-by: Naoya Horiguchi Acked-by: Wu Fengguang Reviewed-by: KAMEZAWA Hiroyuki Acked-by: KOSAKI Motohiro Changes since v1: - fix misused word --- Documentation/vm/page-types.c | 2 ++ Documentation/vm/pagemap.txt | 4 ++++ 2 files changed, 6 insertions(+), 0 deletions(-) diff --git 3.3-rc2.orig/Documentation/vm/page-types.c 3.3-rc2/Documentation/vm/page-types.c index 7445caa..0b13f02 100644 --- 3.3-rc2.orig/Documentation/vm/page-types.c +++ 3.3-rc2/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 3.3-rc2.orig/Documentation/vm/pagemap.txt 3.3-rc2/Documentation/vm/pagemap.txt index df09b96..4600cbe 100644 --- 3.3-rc2.orig/Documentation/vm/pagemap.txt +++ 3.3-rc2/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 + contiguous pages which construct transparent hugepages + [IO related page flags] 1. ERROR IO error occurred 3. UPTODATE page has up-to-date data -- 1.7.7.6 -- 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