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From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Date: Tue, 9 Jul 2013 22:49:50 -0400
Message-ID: <CAHGf_=okii403nAx9tO2B+yU571gOaFM9dthMdDXj520CsCjWA@mail.gmail.com>
Subject: Re: [PATCH 1/1] mm: mempolicy: fix mbind_range() && vma_adjust() interaction
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To: Oleg Nesterov <oleg@redhat.com>
Cc: Colin Cross <ccross@android.com>, Andrew Morton <akpm@linux-foundation.org>, Hugh Dickins <hughd@google.com>, Linus Torvalds <torvalds@linux-foundation.org>, "Hampson, Steven T" <steven.t.hampson@intel.com>, lkml <linux-kernel@vger.kernel.org>, Kyungmin Park <kmpark@infradead.org>, Christoph Hellwig <hch@infradead.org>, John Stultz <john.stultz@linaro.org>, Rob Landley <rob@landley.net>, Arnd Bergmann <arnd@arndb.de>, Cyrill Gorcunov <gorcunov@openvz.org>, David Rientjes <rientjes@google.com>, Davidlohr Bueso <dave@gnu.org>, Kees Cook <keescook@chromium.org>, Al Viro <viro@zeniv.linux.org.uk>, Mel Gorman <mgorman@suse.de>, Michel Lespinasse <walken@google.com>, Rik van Riel <riel@redhat.com>, Konstantin Khlebnikov <khlebnikov@openvz.org>, Peter Zijlstra <a.p.zijlstra@chello.nl>, Rusty Russell <rusty@rustcorp.com.au>, "Eric W. Biederman" <ebiederm@xmission.com>, Srikar Dronamraju <srikar@linux.vnet.ibm.com>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>, Michal Hocko <mhocko@suse.cz>, Anton Vorontsov <anton.vorontsov@linaro.org>, Pekka Enberg <penberg@kernel.org>, Shaohua Li <shli@fusionio.com>, Sasha Levin <sasha.levin@oracle.com>, Johannes Weiner <hannes@cmpxchg.org>, Ingo Molnar <mingo@kernel.org>, "open list:DOCUMENTATION" <linux-doc@vger.kernel.org>, "open list:MEMORY MANAGEMENT" <linux-mm@kvack.org>, "open list:GENERIC INCLUDE/A..." <linux-arch@vger.kernel.org>

>> case 3 makes the same scenario?
>
> Not really, afaics. "case 3" is when vma_merge() "merges" a hole with
> vma, mbind_range() works with the already mmapped regions.

Oops, you are right.

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