diff options
| author | Cody P Schafer <cody@linux.vnet.ibm.com> | 2013-02-07 12:27:06 +1100 |
|---|---|---|
| committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2013-02-14 15:25:42 +1100 |
| commit | e212e72563ad04eaada9a5bdb7ae1418d569fa1e (patch) | |
| tree | b189de89b50d931c2f43b052044ef8d544a8adc9 /mm | |
| parent | b2975ca8734fc771f874525c5b78d2b0936015a8 (diff) | |
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@linux.vnet.ibm.com>
Cc: David Hansen <dave@linux.vnet.ibm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/page_alloc.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 350c28237382..03519f5b719f 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -247,13 +247,20 @@ static int page_outside_zone_boundaries(struct zone *zone, struct page *page) 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; } |