linux-kernel - Re: [PATCH 6/8] net: use numa_node in net

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Message-Id: <20080219.034110.191579889.davem@davemloft.net>
Date:	Tue, 19 Feb 2008 03:41:10 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	mingo@...e.hu
Cc:	Yinghai.Lu@....COM, greg@...ah.com, akpm@...ux-foundation.org,
	jeff@...zik.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/8] net: use numa_node in net_devcice->dev instead of
 parent

From: Ingo Molnar <mingo@...e.hu>
Date: Tue, 19 Feb 2008 12:21:46 +0100

> 
> * Yinghai Lu <Yinghai.Lu@....COM> wrote:
> 
> >  struct sk_buff *__netdev_alloc_skb(struct net_device *dev,
> >  		unsigned int length, gfp_t gfp_mask)
> >  {
> > -	int node = dev->dev.parent ? dev_to_node(dev->dev.parent) : -1;
> > +	int node = dev_to_node(&dev->dev);
> 
> i think this is a fix for the networking folks. (Dave Cc:-ed)

It keeps getting NAK's because it's wrong.

The author of the patch hasn't convinced folks why this is really
necessary, and using the net_device embedded device struct is
definitely wrong here.  It doesn't contain the NUMA node information,
the physical device does, and that is what the parent it.
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