Date: Fri, 16 Aug 2013 21:52:12 +0300
From: "Kirill A. Shutemov" <kirill@shutemov.name>
To: Alex Thorlton <athorlton@sgi.com>
Cc: Dave Hansen <dave.hansen@intel.com>, linux-kernel@vger.kernel.org,
        Ingo Molnar <mingo@redhat.com>, Peter Zijlstra <peterz@infradead.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Mel Gorman <mgorman@suse.de>,
        "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
        Rik van Riel <riel@redhat.com>, Johannes Weiner <hannes@cmpxchg.org>,
        "Eric W . Biederman" <ebiederm@xmission.com>,
        Sedat Dilek <sedat.dilek@gmail.com>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        Dave Jones <davej@redhat.com>,
        Michael Kerrisk <mtk.manpages@gmail.com>,
        "Paul E . McKenney" <paulmck@linux.vnet.ibm.com>,
        David Howells <dhowells@redhat.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Al Viro <viro@zeniv.linux.org.uk>, Oleg Nesterov <oleg@redhat.com>,
        Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
        Kees Cook <keescook@chromium.org>, Robin Holt <holt@sgi.com>
Subject: Re: [PATCH 1/8] THP: Use real address for NUMA policy
Message-ID: <20130816185212.GA3568@shutemov.name>
References: <87wqo050fc.fsf@tassilo.jf.intel.com>
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 <1376663644-153546-2-git-send-email-athorlton@sgi.com>
 <520E672C.3080102@intel.com>
 <20130816181728.GQ26093@sgi.com>
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On Fri, Aug 16, 2013 at 01:17:28PM -0500, Alex Thorlton wrote:
> > Could you add some actual descriptions to these patches that say why you
> > are doing this, and why this particular patch is needed and implemented
> > this way?
> > 
> > You mention that THP is slow for you, then go on to implement some
> > non-cached page zero'ing, but you never quite connect the dots.
> 
> I actually didn't write these patches (made a few tweaks to get them
> running on the latest kernel though).  They were submitted last July by 
> Peter Zijlstra.  Andi Kleen suggested that I re-run some of my tests
> using these patches to see whether they solved my issue.  I just
> included my updated patches so that people could confirm that I'd pulled
> them forward properly.
> 
> The messages from the original submission can be found here:
> https://lkml.org/lkml/2012/7/20/165

Here's more up-to-date version: https://lkml.org/lkml/2012/8/20/337

-- 
 Kirill A. Shutemov
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