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From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Andrew Morton <akpm@linux-foundation.org>,
	Dmitry Vyukov <dvyukov@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>,
	David Rientjes <rientjes@google.com>,
	Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
	Michal Hocko <mhocko@suse.com>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: [PATCHv2 0/2] Fix another VM_BUG_ON_PAGE(PageTail(page)) on mbind(2)
Date: Tue,  2 Feb 2016 19:20:59 +0300	[thread overview]
Message-ID: <1454430061-116955-1-git-send-email-kirill.shutemov@linux.intel.com> (raw)

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

The fisrt patch fixes the bug by filter out non migratable VMAs in
queue_pages_test_walk(). There's no point to queue pages from non-migratable
VMA even for MPOL_MF_STRICT.

The second patch replace VM_BUG_ON_PAGE() with WARN_RATELIMIT() in
isolate_lru_page(). Most attempts to isolate tail pages are not fatal, as
these pages usually are not on LRU and will not be isolated.

v2:
 - address feedback from Michal Hocko;

Kirill A. Shutemov (2):
  mempolicy: do not try to queue pages from !vma_migratable()
  mm: downgrade VM_BUG in isolate_lru_page() to warning

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

-- 
2.7.0

WARNING: multiple messages have this Message-ID (diff)
From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Andrew Morton <akpm@linux-foundation.org>,
	Dmitry Vyukov <dvyukov@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>,
	David Rientjes <rientjes@google.com>,
	Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
	Michal Hocko <mhocko@suse.com>,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: [PATCHv2 0/2] Fix another VM_BUG_ON_PAGE(PageTail(page)) on mbind(2)
Date: Tue,  2 Feb 2016 19:20:59 +0300	[thread overview]
Message-ID: <1454430061-116955-1-git-send-email-kirill.shutemov@linux.intel.com> (raw)

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

The fisrt patch fixes the bug by filter out non migratable VMAs in
queue_pages_test_walk(). There's no point to queue pages from non-migratable
VMA even for MPOL_MF_STRICT.

The second patch replace VM_BUG_ON_PAGE() with WARN_RATELIMIT() in
isolate_lru_page(). Most attempts to isolate tail pages are not fatal, as
these pages usually are not on LRU and will not be isolated.

v2:
 - address feedback from Michal Hocko;

Kirill A. Shutemov (2):
  mempolicy: do not try to queue pages from !vma_migratable()
  mm: downgrade VM_BUG in isolate_lru_page() to warning

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

-- 
2.7.0

--
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             reply	other threads:[~2016-02-02 16:21 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-02-02 16:20 Kirill A. Shutemov [this message]
2016-02-02 16:20 ` [PATCHv2 0/2] Fix another VM_BUG_ON_PAGE(PageTail(page)) on mbind(2) Kirill A. Shutemov
2016-02-02 16:21 ` [PATCHv2 1/2] mempolicy: do not try to queue pages from !vma_migratable() Kirill A. Shutemov
2016-02-02 16:21   ` Kirill A. Shutemov
2016-02-02 16:21 ` [PATCHv2 2/2] mm: downgrade VM_BUG in isolate_lru_page() to warning Kirill A. Shutemov
2016-02-02 16:21   ` Kirill A. Shutemov
2016-02-02 20:58   ` Andrew Morton
2016-02-02 20:58     ` Andrew Morton
2016-02-02 22:03     ` Kirill A. Shutemov
2016-02-02 22:03       ` Kirill A. Shutemov
2016-02-03 14:58   ` Michal Hocko
2016-02-03 14:58     ` Michal Hocko

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