Messages in this thread Patch in this message | | | From | Naoya Horiguchi <> | Subject | [PATCH 3/4] pagemap: export KPF_THP | Date | Wed, 21 Dec 2011 17:23:47 -0500 |
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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 <n-horiguchi@ah.jp.nec.com> Nacked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Reviewed-by: Wu Fengguang <fengguang.wu@intel.com>
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
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