The patch titled
mm: warn once when a page is freed with PG_mlocked set
has been removed from the -mm tree. Its filename was
mm-warn-once-when-a-page-is-freed-with-pg_mlocked-set.patch
This patch was dropped because an updated version will be merged
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: mm: warn once when a page is freed with PG_mlocked set
From: Mel Gorman <mel@xxxxxxxxx>
When a page is freed with the PG_mlocked set, it is considered an
unexpected but recoverable situation. A counter records how often this
event happens but it is easy to miss that this event has occured at
all. This patch warns once when PG_mlocked is set to prompt debuggers
to check the counter to see how often it is happening.
Signed-off-by: Mel Gorman <mel@xxxxxxxxx>
Reviewed-by: Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx>
Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 5 +++++
1 file changed, 5 insertions(+)
diff -puN mm/page_alloc.c~mm-warn-once-when-a-page-is-freed-with-pg_mlocked-set mm/page_alloc.c
--- a/mm/page_alloc.c~mm-warn-once-when-a-page-is-freed-with-pg_mlocked-set
+++ a/mm/page_alloc.c
@@ -495,6 +495,11 @@ static inline void __free_one_page(struc
*/
static inline void free_page_mlock(struct page *page)
{
+ WARN_ONCE(1, KERN_WARNING
+ "Page flag mlocked set for process %s at pfn:%05lx\n"
+ "page:%p flags:%#lx\n",
+ current->comm, page_to_pfn(page),
+ page, page->flags|__PG_MLOCKED);
__dec_zone_page_state(page, NR_MLOCK);
__count_vm_event(UNEVICTABLE_MLOCKFREED);
}
_
Patches currently in -mm which might be from mel@xxxxxxxxx are
origin.patch
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