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Date: Mon, 02 Mar 2015 11:25:55 -0800
From: Dave Hansen <dave@sr71.net>
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To: Matt <jackdachef@gmail.com>, Dave Chinner <david@fromorbit.com>
CC: Linux Kernel <linux-kernel@vger.kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Will Deacon <will.deacon@arm.com>
Subject: Re: [regression v4.0-rc1] mm: IPIs from TLB flushes causing significant
 performance degradation.
References: <CAG-aW04bcQf-Li7ciNjXe086_XqGbUe0=gq4NH_yoJ8ns6G8eQ@mail.gmail.com>
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On 03/02/2015 11:17 AM, Matt wrote:
> Linus already posted a fix to the problem, however I can't seem to
> find the matching commit in his tree (searching for "TLC regression"
> or "TLB cache").

It's in 721c21c17ab958abf19a8fc611c3bd4743680e38 iirc.