From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
Date: Wed, 12 Jan 2005 12:29:07 +0000
Subject: Re: page table lock patch V15 [0/7]: overview
Message-Id: <20050112122907.GB30437@logos.cnet>
List-Id: <linux-ia64.vger.kernel.org>
References: <Pine.LNX.4.58.0411221424580.22895@schroedinger.engr.sgi.com> <Pine.LNX.4.58.0411221429050.20993@ppc970.osdl.org> <Pine.LNX.4.58.0412011539170.5721@schroedinger.engr.sgi.com> <Pine.LNX.4.58.0412011545060.5721@schroedinger.engr.sgi.com> <Pine.LNX.4.58.0501041129030.805@schroedinger.engr.sgi.com> <Pine.LNX.4.58.0501041137410.805@schroedinger.engr.sgi.com> <m1652ddljp.fsf@muc.de> <Pine.LNX.4.58.0501110937450.32744@schroedinger.engr.sgi.com> <41E4BCBE.2010001@yahoo.com.au> <20050112014235.7095dcf4.akpm@osdl.org>
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To: Andrew Morton <akpm@osdl.org>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>, clameter@sgi.com, torvalds@osdl.org, ak@muc.de, hugh@veritas.com, linux-mm@kvack.org, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, benh@kernel.crashing.org

On Wed, Jan 12, 2005 at 01:42:35AM -0800, Andrew Morton wrote:
> Nick Piggin <nickpiggin@yahoo.com.au> wrote:
> >
> > Christoph Lameter wrote:
> >  > Changes from V14->V15 of this patch:
> > 
> >  Hi,
> > 
> >  I wonder what everyone thinks about moving forward with these patches?
> 
> I was waiting for them to settle down before paying more attention.
> 
> My general take is that these patches address a single workload on
> exceedingly rare and expensive machines.  If they adversely affect common
> and cheap machines via code complexity, memory footprint or via runtime
> impact then it would be pretty hard to justify their inclusion.
> 
> Do we have measurements of the negative and/or positive impact on smaller
> machines?

I haven't seen wide performance numbers of this patch yet.

Hint: STP is really easy.