linux-kernel - Re: [PATCH 6/8] Add __GFP_OTHER

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Message-Id: <20110308091843.8A95.A69D9226@jp.fujitsu.com>
Date:	Tue,  8 Mar 2011 09:19:06 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Andi Kleen <ak@...ux.intel.com>
Cc:	kosaki.motohiro@...fujitsu.com, Andi Kleen <andi@...stfloor.org>,
	akpm@...ux-foundation.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, aarcange@...hat.com
Subject: Re: [PATCH 6/8] Add __GFP_OTHER_NODE flag

> > Yes, less intrusive. But are you using current NUMA stastics on
> > practical system?
> 
> Yes I do. I know users use it too.
> 
> We unfortunately still have enough NUMA locality problems in the kernel
> so that overflowing nodes, causing fallbacks for process memory etc. are not uncommon. 
> If you get that then numastat is very useful to track down what happens.
> 
> In an ideal world with perfect NUMA balancing it wouldn't be needed,
> but we're far from that.
> 
> Also the numactl test suite depends on them.

If so, I have no objection of cource. :)

Thanks.



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