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authorSasha Levin <sasha.levin@oracle.com>2014-01-24 03:52:54 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-24 04:36:50 +0400
commit309381feaee564281c3d9e90fbca8963bb7428ad (patch)
tree7e9f990c0cffcb8c5fc90deb1c7eac445c5ada0e /include/linux/hugetlb_cgroup.h
parente3bba3c3c90cd434c1ccb9e5dc704a96baf9541c (diff)
downloadlinux-309381feaee564281c3d9e90fbca8963bb7428ad.tar.xz
mm: dump page when hitting a VM_BUG_ON using VM_BUG_ON_PAGE
Most of the VM_BUG_ON assertions are performed on a page. Usually, when one of these assertions fails we'll get a BUG_ON with a call stack and the registers. I've recently noticed based on the requests to add a small piece of code that dumps the page to various VM_BUG_ON sites that the page dump is quite useful to people debugging issues in mm. This patch adds a VM_BUG_ON_PAGE(cond, page) which beyond doing what VM_BUG_ON() does, also dumps the page before executing the actual BUG_ON. [akpm@linux-foundation.org: fix up includes] Signed-off-by: Sasha Levin <sasha.levin@oracle.com> Cc: "Kirill A. Shutemov" <kirill@shutemov.name> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/hugetlb_cgroup.h')
-rw-r--r--include/linux/hugetlb_cgroup.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/hugetlb_cgroup.h b/include/linux/hugetlb_cgroup.h
index ce8217f7b5c2..787bba3bf552 100644
--- a/include/linux/hugetlb_cgroup.h
+++ b/include/linux/hugetlb_cgroup.h
@@ -15,6 +15,7 @@
#ifndef _LINUX_HUGETLB_CGROUP_H
#define _LINUX_HUGETLB_CGROUP_H
+#include <linux/mmdebug.h>
#include <linux/res_counter.h>
struct hugetlb_cgroup;
@@ -28,7 +29,7 @@ struct hugetlb_cgroup;
static inline struct hugetlb_cgroup *hugetlb_cgroup_from_page(struct page *page)
{
- VM_BUG_ON(!PageHuge(page));
+ VM_BUG_ON_PAGE(!PageHuge(page), page);
if (compound_order(page) < HUGETLB_CGROUP_MIN_ORDER)
return NULL;
@@ -38,7 +39,7 @@ static inline struct hugetlb_cgroup *hugetlb_cgroup_from_page(struct page *page)
static inline
int set_hugetlb_cgroup(struct page *page, struct hugetlb_cgroup *h_cg)
{
- VM_BUG_ON(!PageHuge(page));
+ VM_BUG_ON_PAGE(!PageHuge(page), page);
if (compound_order(page) < HUGETLB_CGROUP_MIN_ORDER)
return -1;