linux-kernel - Re: [PATCH 1/7] netpoll: use GFP_ATOMIC in slave_enable_netpoll() and __netpoll

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Message-ID: <1344246244.26674.0.camel@edumazet-glaptop>
Date:	Mon, 06 Aug 2012 11:44:04 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Cong Wang <amwang@...hat.com>
Cc:	netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
	Jay Vosburgh <fubar@...ibm.com>,
	Andy Gospodarek <andy@...yhouse.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Cong Wang <xiyou.wangcong@...il.com>,
	Joe Perches <joe@...ches.com>,
	Neil Horman <nhorman@...driver.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/7] netpoll: use GFP_ATOMIC in slave_enable_netpoll()
 and __netpoll_setup()

On Mon, 2012-08-06 at 17:08 +0800, Cong Wang wrote:
> On Fri, 2012-08-03 at 12:10 +0200, Eric Dumazet wrote: 
> > 
> > I did this , just take it ;)
> 
> Do we have to pass gfp to ->ndo_netpoll_setup() too? It seems no, so far
> I don't think we have to do that.
> 
> Thanks.
> 

It is needed.

->ndo_netpoll_setup() is called from __netpoll_setup()

So it would make no sense to allow GFP_KERNEL allocations in
ndo_netpoll_setup() hgandlers if we called __netpoll_setup() with
GFP_ATOMIC gfp



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