linux-kernel - Re: [patch] SLQB slab allocator (try 2)

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Date:	Wed, 18 Feb 2009 17:19:04 +0800
From:	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>
To:	Pekka Enberg <penberg@...helsinki.fi>
Cc:	Christoph Lameter <cl@...ux-foundation.org>,
	Mel Gorman <mel@....ul.ie>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	Nick Piggin <npiggin@...e.de>,
	Linux Memory Management List <linux-mm@...ck.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Lin Ming <ming.m.lin@...el.com>
Subject: Re: [patch] SLQB slab allocator (try 2)

On Wed, 2009-02-18 at 11:01 +0200, Pekka Enberg wrote:
> On Wed, 2009-02-18 at 16:43 +0800, Zhang, Yanmin wrote:
> > > > Code: be 3f 06 00 00 48 c7 c7 c7 96 80 80 e8 b8 e2 f9 ff e8 c5 c2
> > 45 00 9c 5b fa 65 8b 04 25 24 00 00 00 48 98 49 8b 94 c4 e8  
> > > > RIP  [<ffffffff8028fae3>] kmem_cache_alloc+0x43/0x97
> > > >  RSP <ffff88022f865e20>
> > > > CR2: 0000000000000000
> > > > ---[ end trace a7919e7f17c0a725 ]---
> > > > swapper used greatest stack depth: 5376 bytes left
> > > > Kernel panic - not syncing: Attempted to kill init!
> > > 
> > > Aah, we need to fix up some more PAGE_SHIFTs in the code.
> > The new patch fixes hang issue. netperf UDP-U-4k (start CPU_NUM clients) result is pretty good.
> 
> Do you have your patch on top of it as well?
Yes.

>  Btw, can I add a Tested-by
> tag from you to the patch?
Ok. Another testing with UDP-U-4k (start 1 client and bind client and server to different
cpu) result is improved, but is not so good as SLQB's. But we can increase slub_max_order
to get the similiar result like SLQB.


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