Messages in this thread | | | Date | Mon, 7 Apr 2014 23:11:06 +0300 | From | "Kirill A. Shutemov" <> | Subject | Re: mm: BUG in do_huge_pmd_wp_page |
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On Mon, Apr 07, 2014 at 03:40:46PM -0400, Sasha Levin wrote: > It also breaks fairly quickly under testing because: > > On 04/07/2014 10:48 AM, Kirill A. Shutemov wrote: > > + if (IS_ENABLED(CONFIG_DEBUG_PAGEALLOC)) { > > + spin_lock(ptl); > > ^ We go into atomic > > > + if (unlikely(!pmd_same(*pmd, orig_pmd))) > > + goto out_race; > > + } > > + > > if (!page) > > clear_huge_page(new_page, haddr, HPAGE_PMD_NR); > > else > > copy_user_huge_page(new_page, page, haddr, vma, HPAGE_PMD_NR); > > copy_user_huge_page() doesn't like running in atomic state, > and asserts might_sleep().
Okay, I'll try something else.
-- Kirill A. Shutemov
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