linux-kernel - Re: Mainline kernel OLTP performance update

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Message-Id: <20090115230043.57caae5d.akpm@linux-foundation.org>
Date:	Thu, 15 Jan 2009 23:00:43 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Nick Piggin <nickpiggin@...oo.com.au>
Cc:	netdev@...r.kernel.org, sfr@...b.auug.org.au, matthew@....cx,
	matthew.r.wilcox@...el.com, chinang.ma@...el.com,
	linux-kernel@...r.kernel.org, sharad.c.tripathi@...el.com,
	arjan@...ux.intel.com, andi.kleen@...el.com,
	suresh.b.siddha@...el.com, harita.chilukuri@...el.com,
	douglas.w.styner@...el.com, peter.xihong.wang@...el.com,
	hubert.nueckel@...el.com, chris.mason@...cle.com,
	srostedt@...hat.com, linux-scsi@...r.kernel.org,
	andrew.vasquez@...gic.com, anirban.chakraborty@...gic.com
Subject: Re: Mainline kernel OLTP performance update

On Fri, 16 Jan 2009 17:46:23 +1100 Nick Piggin <nickpiggin@...oo.com.au> wrote:

> On Friday 16 January 2009 15:12:10 Andrew Morton wrote:
> > On Fri, 16 Jan 2009 15:03:12 +1100 Nick Piggin <nickpiggin@...oo.com.au> 
> wrote:
> > > I would like to see SLQB merged in mainline, made default, and wait for
> > > some number releases. Then we take what we know, and try to make an
> > > informed decision about the best one to take. I guess that is problematic
> > > in that the rest of the kernel is moving underneath us. Do you have
> > > another idea?
> >
> > Nope.  If it doesn't work out, we can remove it again I guess.
> 
> OK, I have these numbers to show I'm not completely off my rocker to suggest
> we merge SLQB :) Given these results, how about I ask to merge SLQB as default
> in linux-next, then if nothing catastrophic happens, merge it upstream in the
> next merge window, then a couple of releases after that, given some time to
> test and tweak SLQB, then we plan to bite the bullet and emerge with just one
> main slab allocator (plus SLOB).

That's a plan.

> SLQB tends to be the winner here.

Can you think of anything with which it will be the loser?

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