The patch titled
Subject: mm/page_alloc: add informative debugging message in page_outside_zone_boundaries()
has been added to the -mm tree. Its filename is
mm-page_alloc-add-informative-debugging-message-in-page_outside_zone_boundaries.patch
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------------------------------------------------------
From: Cody P Schafer <cody@xxxxxxxxxxxxxxxxxx>
Subject: mm/page_alloc: add informative debugging message in page_outside_zone_boundaries()
Add a debug message which prints when a page is found outside of the
boundaries of the zone it should belong to. Format is:
"page $pfn outside zone [ $start_pfn - $end_pfn ]"
Signed-off-by: Cody P Schafer <cody@xxxxxxxxxxxxxxxxxx>
Cc: David Hansen <dave@xxxxxxxxxxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Mel Gorman <mel@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 7 +++++++
1 file changed, 7 insertions(+)
diff -puN mm/page_alloc.c~mm-page_alloc-add-informative-debugging-message-in-page_outside_zone_boundaries mm/page_alloc.c
--- a/mm/page_alloc.c~mm-page_alloc-add-informative-debugging-message-in-page_outside_zone_boundaries
+++ a/mm/page_alloc.c
@@ -246,13 +246,20 @@ static int page_outside_zone_boundaries(
int ret = 0;
unsigned seq;
unsigned long pfn = page_to_pfn(page);
+ unsigned long sp, start_pfn;
do {
seq = zone_span_seqbegin(zone);
+ start_pfn = zone->zone_start_pfn;
+ sp = zone->spanned_pages;
if (!zone_spans_pfn(zone, pfn))
ret = 1;
} while (zone_span_seqretry(zone, seq));
+ if (ret)
+ pr_debug("page %lu outside zone [ %lu - %lu ]\n",
+ pfn, start_pfn, start_pfn + sp);
+
return ret;
}
_
Patches currently in -mm which might be from cody@xxxxxxxxxxxxxxxxxx are
linux-next.patch
mm-add-section_in_page_flags.patch
mm-add-use-zone_end_pfn-and-zone_spans_pfn.patch
mm-add-zone_is_empty-and-zone_is_initialized.patch
mm-page_alloc-add-a-vm_bug-in-__free_one_page-if-the-zone-is-uninitialized.patch
mmzone-add-pgdat_end_pfnis_empty-helpers-consolidate.patch
mm-page_alloc-add-informative-debugging-message-in-page_outside_zone_boundaries.patch
mm-page_alloc-add-informative-debugging-message-in-page_outside_zone_boundaries-fix.patch
mm-add-helper-ensure_zone_is_initialized.patch
mm-memory_hotplug-use-ensure_zone_is_initialized.patch
mm-memory_hotplug-use-pgdat_end_pfn-instead-of-open-coding-the-same.patch
maintainers-mm-add-additional-include-files-to-listing.patch
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