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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2016-01-15 02:21:43 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-15 03:00:49 +0300
commitbb5b8589767a300014ba21c5984e6a4d15f0702d (patch)
tree5ed96a77444ca8d83020e6b540b8ba3b17a5f468 /mm/vmscan.c
parent0eb77e9880321915322d42913c3b53241739c8aa (diff)
downloadlinux-bb5b8589767a300014ba21c5984e6a4d15f0702d.tar.xz
mm: make sure isolate_lru_page() is never called for tail page
The VM_BUG_ON_PAGE() would catch such cases if any still exists. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmscan.c')
-rw-r--r--mm/vmscan.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index bb0cbd4c9f01..108bd119f2f6 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1426,6 +1426,7 @@ int isolate_lru_page(struct page *page)
int ret = -EBUSY;
VM_BUG_ON_PAGE(!page_count(page), page);
+ VM_BUG_ON_PAGE(PageTail(page), page);
if (PageLRU(page)) {
struct zone *zone = page_zone(page);