The patch titled
Subject: mm: page_alloc: Make paranoid check in move_freepages a VM_BUG_ON
has been removed from the -mm tree. Its filename was
mm-page_alloc-make-paranoid-check-in-move_freepages-a-vm_bug_on.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Mel Gorman <mgorman@xxxxxxx>
Subject: mm: page_alloc: Make paranoid check in move_freepages a VM_BUG_ON
Since 2.6.24 there has been a paranoid check in move_freepages that looks
up the zone of two pages. This is a very slow path and the only time I've
seen this bug trigger recently is when memory initialisation was broken
during patch development. Despite the fact it's a slow path, this patch
converts the check to a VM_BUG_ON anyway as it has served its purpose by
now.
Signed-off-by: Mel Gorman <mgorman@xxxxxxx>
Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
Acked-by: Rik van Riel <riel@xxxxxxxxxx>
Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/page_alloc.c~mm-page_alloc-make-paranoid-check-in-move_freepages-a-vm_bug_on mm/page_alloc.c
--- a/mm/page_alloc.c~mm-page_alloc-make-paranoid-check-in-move_freepages-a-vm_bug_on
+++ a/mm/page_alloc.c
@@ -1015,7 +1015,7 @@ int move_freepages(struct zone *zone,
* Remove at a later date when no bug reports exist related to
* grouping pages by mobility
*/
- BUG_ON(page_zone(start_page) != page_zone(end_page));
+ VM_BUG_ON(page_zone(start_page) != page_zone(end_page));
#endif
for (page = start_page; page <= end_page;) {
_
Patches currently in -mm which might be from mgorman@xxxxxxx are
origin.patch
mm-introduce-do_shared_fault-and-drop-do_fault-fix-fix.patch
do_shared_fault-check-that-mmap_sem-is-held.patch
x86-optimize-resource-lookups-for-ioremap.patch
x86-optimize-resource-lookups-for-ioremap-fix.patch
x86-use-optimized-ioresource-lookup-in-ioremap-function.patch
linux-next.patch
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