linux-kernel - Re: [PATCH 2/2] net: make net and forcedeth to use kmalloc

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Message-ID: <20070703120430.4dcbba68@freepuppy.localdomain.hemminger.net>
Date:	Tue, 3 Jul 2007 12:04:30 -0700
From:	Stephen Hemminger <shemminger@...ux-foundation.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Yinghai Lu <Yinghai.Lu@....COM>, Andi Kleen <ak@...e.de>,
	Greg KH <greg@...ah.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	netdev@...r.kernel.org
Subject: Re: [PATCH 2/2] net: make net and forcedeth to use kmalloc_node

On Tue, 3 Jul 2007 11:58:40 -0700
Andrew Morton <akpm@...ux-foundation.org> wrote:

> On Fri, 29 Jun 2007 13:30:36 -0700
> Yinghai Lu <Yinghai.Lu@....COM> wrote:
> 
> > [PATCH 2/2] net: make net and forcedeth to use kmalloc_node
> 
> Please copy netdev@...r.kernel.org on net patches.
> 
> This patch modifies a net driver as well as the networking core.  These
> subsytems have different maintainers who run different development trees. 
> Consequently I must split your patch into two and change their titles and
> changelogs appropriately.
> 
> Please do this for us in future, thanks.
> 
> 
> > diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c
> > index 42ba1c0..6d53b52 100644
> > --- a/drivers/net/forcedeth.c
> > +++ b/drivers/net/forcedeth.c
> > @@ -1383,7 +1383,7 @@ static int nv_alloc_rx(struct net_device *dev)
> >  		less_rx = np->last_rx.orig;
> >  
> >  	while (np->put_rx.orig != less_rx) {
> > -		struct sk_buff *skb = dev_alloc_skb(np->rx_buf_sz + NV_RX_ALLOC_PAD);
> > +		struct sk_buff *skb = dev_alloc_skb_node(np->rx_buf_sz + NV_RX_ALLOC_PAD, dev_to_node(&dev->dev));
> 
> If we're going to do this then it would probably make sense to change
> dev_alloc_skb_node() so that it takes a `struct net_device *' rather than a
> bare node-id.  That's a call which the net guys will need to make, which is
> why we cc them on our emails.

The driver should use netdev_alloc_skb. That routine is supposed to be overriden
on architecture's that need per node changes.

> >  		if (skb) {
> >  			np->put_rx_ctx->skb = skb;
> >  			np->put_rx_ctx->dma = pci_map_single(np->pci_dev,
> > @@ -1415,7 +1415,7 @@ static int nv_alloc_rx_optimized(struct net_device *dev)
> >  		less_rx = np->last_rx.ex;
> >  
> >  	while (np->put_rx.ex != less_rx) {
> > -		struct sk_buff *skb = dev_alloc_skb(np->rx_buf_sz + NV_RX_ALLOC_PAD);
> > +		struct sk_buff *skb = dev_alloc_skb_node(np->rx_buf_sz + NV_RX_ALLOC_PAD, dev_to_node(&dev->dev));
> 
> It might help to edit code in an 80-col xterm.
> 
> Please run scritps/checkpatch.pl across all your diffs.  Its suggestions
> are by no means compulsory, but they do provide things for you to check up
> and and have a think about, thanks.
> 
> I won't apply this (these) patches because I expect API changes.
> 
> 
> -
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-- 
Stephen Hemminger <shemminger@...ux-foundation.org>
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