On Wed, 26 Sep 2012, Naoya Horiguchi wrote: > diff --git v3.6-rc6.orig/fs/proc/page.c v3.6-rc6/fs/proc/page.c > index 7fcd0d6..b8730d9 100644 > --- v3.6-rc6.orig/fs/proc/page.c > +++ v3.6-rc6/fs/proc/page.c > @@ -115,7 +115,13 @@ u64 stable_page_flags(struct page *page) > u |= 1 << KPF_COMPOUND_TAIL; > if (PageHuge(page)) > u |= 1 << KPF_HUGE; > - else if (PageTransCompound(page)) > + /* > + * PageTransCompound can be true for non-huge compound pages (slab > + * pages or pages allocated by drivers with __GFP_COMP) because it > + * just checks PG_head/PG_tail, so we need to check PageLRU to make > + * sure a given page is a thp, not a non-huge compound page. > + */ > + else if (PageTransCompound(page) && PageLRU(compound_trans_head(page))) > u |= 1 << KPF_THP; > > /* Yes, that looks good. Nice catch by Fengguang. -- 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>