The information in /sys/kernel/debug/page_owner includes the migratetype declared during the page allocation via gfp_flags. This is also checked against the pageblock's migratetype, and reported as Fallback allocation if these two differ (although in fact fallback allocation is not the only reason why they can differ). However, the migratetype actually printed is the one of the pageblock, not of the page itself, so it's the same for all pages in the pageblock. This is apparently a bug, noticed when working on other page_owner improvements. Fixed. Signed-off-by: Vlastimil Babka <vbabka@xxxxxxx> --- mm/page_owner.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/page_owner.c b/mm/page_owner.c index 983c3a1..a9f16b8 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -113,7 +113,7 @@ print_page_owner(char __user *buf, size_t count, unsigned long pfn, "PFN %lu Block %lu type %d %s Flags %s%s%s%s%s%s%s%s%s%s%s%s\n", pfn, pfn >> pageblock_order, - pageblock_mt, + page_mt, pageblock_mt != page_mt ? "Fallback" : " ", PageLocked(page) ? "K" : " ", PageError(page) ? "E" : " ", -- 2.6.2 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>