On Wed, Feb 09, 2011 at 03:52:46PM +0900, KAMEZAWA Hiroyuki wrote: > On Wed, 9 Feb 2011 15:50:01 +0900 > Daisuke Nishimura <nishimura@xxxxxxxxxxxxxxxxx> wrote: > > > > > > > In hex, pc->flags was 7A00000000004 and this means PCG_USED bit is set. > > > This implies page_remove_rmap() may not be called but ->mapping is NULL. Hmm? > > > (7A is encoding of section number.) > > > > > Sigh.. it seems another freed-but-not-uncharged problem.. > > > > Ah, ok, this is maybe caused by this. I'm sorry that I missed this. > == > static inline int free_pages_check(struct page *page) > { > if (unlikely(page_mapcount(page) | > (page->mapping != NULL) | > (atomic_read(&page->_count) != 0) | > (page->flags & PAGE_FLAGS_CHECK_AT_FREE) | > (mem_cgroup_bad_page_check(page)))) { <==========(*) > bad_page(page); > return 1; > == > > Then, ok, this is a memcgroup and hugepage issue. > > I'll look into. Yes, the rest of the info on the page looked ok and shouldn't have triggered a bad_page call. Thanks so much for looking into it. Andrea -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx"> email@xxxxxxxxx </a>