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Date: Mon, 29 Feb 2016 18:58:17 +0100
From: Oleg Nesterov <oleg@redhat.com>
Subject: Re: [PATCH 07/18] mm, proc: make clear_refs killable
Message-ID: <20160229175816.GE3615@redhat.com>
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To: Michal Hocko <mhocko@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>, Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org, Alex Deucher <alexander.deucher@amd.com>, Alex Thorlton <athorlton@sgi.com>, Andrea Arcangeli <aarcange@redhat.com>, Andy Lutomirski <luto@amacapital.net>, Benjamin LaHaise <bcrl@kvack.org>, Christian =?iso-8859-1?Q?K=F6nig?= <christian.koenig@amd.com>, Daniel Vetter <daniel.vetter@intel.com>, Dave Hansen <dave.hansen@linux.intel.com>, David Airlie <airlied@linux.ie>, Davidlohr Bueso <dave@stgolabs.net>, David Rientjes <rientjes@google.com>, "H . Peter Anvin" <hpa@zytor.com>, Hugh Dickins <hughd@google.com>, Ingo Molnar <mingo@kernel.org>, Johannes Weiner <hannes@cmpxchg.org>, "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>, Konstantin Khlebnikov <koct9i@gmail.com>, linux-arch@vger.kernel.org, Mel Gorman <mgorman@suse.de>, Peter Zijlstra <peterz@infradead.org>, Petr Cermak <petrcermak@chromium.org>, Thomas Gleixner <tglx@linutronix.de>

On 02/29, Michal Hocko wrote:
>
> On Mon 29-02-16 18:38:45, Oleg Nesterov wrote:
> 
> > In this case you do not need put_task_struct().
> 
> Why not? Both are after get_proc_task which takes a reference to the
> task...

Yes, but we already have put_task_struct(task) in the "out_mm" path, so
"goto out_mm" should work just fine?

Oleg.

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