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Date: Mon, 13 Jun 2011 07:03:03 -0700 (PDT)
From: Hugh Dickins <hughd@google.com>
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To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
cc: Johannes Weiner <hannes@cmpxchg.org>,
        Andrea Arcangeli <aarcange@redhat.com>, Ying Han <yinghan@google.com>,
        Dave Jones <davej@redhat.com>,
        Linux Kernel <linux-kernel@vger.kernel.org>,
        "linux-mm@kvack.org" <linux-mm@kvack.org>,
        Oleg Nesterov <oleg@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH] [BUGFIX] update mm->owner even if no next owner.
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On Mon, 13 Jun 2011, KAMEZAWA Hiroyuki wrote:
> On Sun, 12 Jun 2011 18:41:58 -0700 (PDT)
> Hugh Dickins <hughd@google.com> wrote:
> > 
> > The version I've signed off and am actually testing is below;
> > but I've not had enough time to spare on the machine which reproduced
> > it before, and another I thought I'd delegate it to last night,
> > failed to reproduce without the patch.  Try again tonight.
> > 
> > Thought I'd better respond despite inadequate testing, given the flaw
> > in the posted patch.  Hope the one below is flawless.
> > 
> 
> Thank you, I'll do test, too.

I confirm it fixes the bug: ran ten hours last night, when a couple
of tries just before without the patch each failed in ten minutes.

(But the load was not testing whether it keeps ownership when it should,
I hope you know a quick check on that: our earlier fixes should fail that.)

Hugh
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