Subject: [merged] mm-hugetlbfs-add-some-vm_bug_ons-to-catch-non-hugetlbfs-pages.patch removed from -mm tree
To: dave.hansen@xxxxxxxxxxxxxxx,dave.jiang@xxxxxxxxx,mgorman@xxxxxxx,n-horiguchi@xxxxxxxxxxxxx,mm-commits@xxxxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Wed, 22 Jan 2014 12:12:17 -0800
The patch titled
Subject: mm: hugetlbfs: Add some VM_BUG_ON()s to catch non-hugetlbfs pages
has been removed from the -mm tree. Its filename was
mm-hugetlbfs-add-some-vm_bug_ons-to-catch-non-hugetlbfs-pages.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Subject: mm: hugetlbfs: Add some VM_BUG_ON()s to catch non-hugetlbfs pages
Dave Jiang reported that he was seeing oopses when running NUMA systems
and default_hugepagesz=1G. I traced the issue down to migrate_page_copy()
trying to use the same code for hugetlb pages and transparent hugepages.
It should not have been trying to pass thp pages in there.
So, add some VM_BUG_ON()s for the next hapless VM developer that tries the
same thing.
Signed-off-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Reviewed-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Tested-by: Dave Jiang <dave.jiang@xxxxxxxxx>
Acked-by: Mel Gorman <mgorman@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/hugetlb.h | 1 +
1 file changed, 1 insertion(+)
diff -puN include/linux/hugetlb.h~mm-hugetlbfs-add-some-vm_bug_ons-to-catch-non-hugetlbfs-pages include/linux/hugetlb.h
--- a/include/linux/hugetlb.h~mm-hugetlbfs-add-some-vm_bug_ons-to-catch-non-hugetlbfs-pages
+++ a/include/linux/hugetlb.h
@@ -360,6 +360,7 @@ static inline pte_t arch_make_huge_pte(p
static inline struct hstate *page_hstate(struct page *page)
{
+ VM_BUG_ON(!PageHuge(page));
return size_to_hstate(PAGE_SIZE << compound_order(page));
}
_
Patches currently in -mm which might be from dave.hansen@xxxxxxxxxxxxxxx are
origin.patch
mm-print-more-details-for-bad_page.patch
mm-print-more-details-for-bad_page-fix.patch
linux-next.patch
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