Messages in this thread | | | Date | Wed, 9 Feb 2011 15:52:46 +0900 | From | KAMEZAWA Hiroyuki <> | Subject | Re: [mmotm] BUG: Bad page state in process khugepaged ? |
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On Wed, 9 Feb 2011 15:50:01 +0900 Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> 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.
Thanks, -Kame
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