linux-kernel - Re: [v2.6.26] what's brewing in x86.git for v2.6.26

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Message-ID: <20080417070129.2bb99e2c@laptopd505.fenrus.org>
Date:	Thu, 17 Apr 2008 07:01:29 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Vegard Nossum <vegard.nossum@...il.com>
Subject: Re: [v2.6.26] what's brewing in x86.git for v2.6.26

On Thu, 17 Apr 2008 12:38:00 +0200
Ingo Molnar <mingo@...e.hu> wrote:

> 
> * Andrew Morton <akpm@...ux-foundation.org> wrote:
> 
> > Thank you whoever wrote kmemcheck.txt
> > 
> > How come slub uses one byte to track the status of each byte when
> > it could use a single bit?
> > 
> > We (still!) have not made the decision whether to proceed with slab
> > or slub.  How hard would it be to port kmemcheck into slab?
> 
> i think slab is clearly out, unless some catastrophic regression is 
> found. 

SLUB still has that several percent TPC-C regression....
Christoph has a small reproducer testcase.


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