[PATCH 0/2] Fix another VM_BUG_ON_PAGE(PageTail(page)) on mbind(2)

From	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Newsgroups	linux.kernel
Subject	[PATCH 0/2] Fix another VM_BUG_ON_PAGE(PageTail(page)) on mbind(2)
Date	2016-02-01 14:30 +0100
Message-ID	<qXmIi-3oo-13@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Dmitry Vyukov reported yet another VM_BUG_ON_PAGE(PageTail(page)) bug from
isolate_lru_page().

The first patch relaxes VM_BUG_ON_PAGE(): no need to crash on tail pages
which are not on LRU. We are not going to isolate them anyway.

The second patch tries streamline logic within queue_pages_range(): no
need to scan non migratable VMAs. The patch requires more careful review.

Any of these patches should fix the issue. I think both should be applied.
The first one is subject for 4.5 as the bogus was introduced there.

Kirill A. Shutemov (2):
  mm: fix bogus VM_BUG_ON_PAGE() in isolate_lru_page()
  mempolicy: do not try to queue pages from !vma_migratable()

 mm/mempolicy.c | 14 +++++---------
 mm/vmscan.c    |  2 +-
 2 files changed, 6 insertions(+), 10 deletions(-)

-- 
2.7.0

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[PATCH 0/2] Fix another VM_BUG_ON_PAGE(PageTail(page)) on mbind(2) "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-02-01 14:30 +0100
  [PATCH 1/2] mm: fix bogus VM_BUG_ON_PAGE() in isolate_lru_page() "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-02-01 14:30 +0100
    Re: [PATCH 1/2] mm: fix bogus VM_BUG_ON_PAGE() in isolate_lru_page() Michal Hocko <mhocko@kernel.org> - 2016-02-01 15:30 +0100
      Re: [PATCH 1/2] mm: fix bogus VM_BUG_ON_PAGE() in isolate_lru_page() "Kirill A. Shutemov" <kirill@shutemov.name> - 2016-02-01 15:40 +0100
        Re: [PATCH 1/2] mm: fix bogus VM_BUG_ON_PAGE() in isolate_lru_page() Michal Hocko <mhocko@kernel.org> - 2016-02-02 14:30 +0100
  [PATCH 2/2] mempolicy: do not try to queue pages from !vma_migratable() "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> - 2016-02-01 14:30 +0100
    Re: [PATCH 2/2] mempolicy: do not try to queue pages from  !vma_migratable() Andrew Morton <akpm@linux-foundation.org> - 2016-02-01 23:30 +0100

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