Date: Thu, 15 Aug 2013 15:40:31 +0200
From: Michal Hocko <mhocko@suse.cz>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Ben Tebulin <tebulin@googlemail.com>, Mel Gorman <mgorman@suse.de>,
        Johannes Weiner <hannes@cmpxchg.org>,
        Balbir Singh <bsingharora@gmail.com>,
        KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
        linux-mm <linux-mm@kvack.org>, Rik van Riel <riel@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Peter Zijlstra <peterz@infradead.org>
Subject: Re: [Bug] Reproducible data corruption on i5-3340M: Please revert
 53a59fc67!
Message-ID: <20130815134031.GC27864@dhcp22.suse.cz>
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On Thu 15-08-13 05:02:31, Linus Torvalds wrote:
> On Thu, Aug 15, 2013 at 2:25 AM, Ben Tebulin <tebulin@googlemail.com> wrote:
> >
> > I just cherry-picked e6c495a96ce0 into 3.9.11 and 3.7.10.
> > Unfortunately this does _not resolve_ my issue (too good to be true) :-(
> 
> Ho humm. I've found at least one other bug, but that one only affects
> hugepages. Do you perhaps have transparent hugepages enabled? But even
> then it looks quite unlikely.

__unmap_hugepage_range is hugetlb not THP if you had that one in mind.
And yes, it doesn't set the range which sounds buggy.

> I'll think about this some more. I'm not happy with how that
> particular whole TLB flushing hack was done, but I need to sleep on
> this.

I am looking into it as well, but there are high prio things which
preempt me a lot :/

Thanks for looking into it.
-- 
Michal Hocko
SUSE Labs
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