linux-kernel - Re: [PATCH][for -mm] per-zone and reclaim enhancements for memory controller take 3 [3/10] per-zone active inactive counter

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Date:	Thu, 29 Nov 2007 12:18:34 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	Lee Schermerhorn <Lee.Schermerhorn@...com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"balbir@...ux.vnet.ibm.com" <balbir@...ux.vnet.ibm.com>,
	"yamamoto@...inux.co.jp" <yamamoto@...inux.co.jp>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"containers@...ts.osdl.org" <containers@...ts.osdl.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Christoph Lameter <clameter@....com>
Subject: Re: [PATCH][for -mm] per-zone and reclaim enhancements for memory
 controller take 3 [3/10] per-zone active inactive counter

On Thu, 29 Nov 2007 11:24:06 +0900
KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote:

> On Thu, 29 Nov 2007 10:37:02 +0900
> KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote:
> 
> > Maybe zonelists of NODE_DATA() is not initialized. you are right.
> > I think N_HIGH_MEMORY will be suitable here...(I'll consider node-hotplug case later.)
> > 
> > Thank you for test!
> > 
> Could you try this ? 
> 
Sorry..this can be a workaround but I noticed I miss something..

ok, just use N_HIGH_MEMORY here and add comment for hotplugging support is not yet.

Christoph-san, Lee-san, could you confirm following ?

- when SLAB is used, kmalloc_node() against offline node will success.
- when SLUB is used, kmalloc_node() against offline node will panic.

Then, the caller should take care that node is online before kmalloc().

Regards,
-Kame 

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