netdev - Re: kernel 3.2.27 on arm: WARNING: at mm/page_alloc.c:2109 __alloc_pages

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Message-ID: <1349451425.21172.119.camel@edumazet-glaptop>
Date:	Fri, 05 Oct 2012 17:37:05 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	mbizon@...ebox.fr
Cc:	David Madore <david+ml@...ore.org>,
	Francois Romieu <romieu@...zoreil.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, Hugh Dickins <hughd@...gle.com>
Subject: Re: kernel 3.2.27 on arm: WARNING: at mm/page_alloc.c:2109
 __alloc_pages_nodemask+0x1d4/0x68c()

On Fri, 2012-10-05 at 17:15 +0200, Maxime Bizon wrote:

> You think removing skb_recycle() is too big a change for stable ?
> 
> Driver change is simple, as recycling is not guaranteed today you have
> this:
> 
>  if (!try_recycle(skb))
>     skb = alloc_skb()
> > 
> we just remove the try_recycle part, we are not adding any new code
> path.
> 
> 
> I'm not the right person to give you a correct NET_SKB_PAD value, I have
> a lot of out of tree patches in my kernels, some custom drivers as well
> that needs quite a lot of headroom, and uncommon network setup.
> 

OK, I'll send the patch to remove skb_recycle()


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