linux-kernel - Re: __alloc_pages() failures reported due to fragmentation

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Date:	Fri, 03 Nov 2006 13:21:54 +0100
From:	Arjan van de Ven <arjan@...radead.org>
To:	Larry Woodman <lwoodman@...hat.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: __alloc_pages() failures reported due to fragmentation


> --- linux-2.6.18.noarch/net/core/sock.c.orig
> +++ linux-2.6.18.noarch/net/core/sock.c
> @@ -1154,7 +1154,7 @@ static struct sk_buff *sock_alloc_send_p
>  			goto failure;
>  
>  		if (atomic_read(&sk->sk_wmem_alloc) < sk->sk_sndbuf) {
> -			skb = alloc_skb(header_len, sk->sk_allocation);
> +			skb = alloc_skb(header_len, gfp_mask);
>  			if (skb) {
>  				int npages;
>  				int i;

Hi,

this is not actually right though... sk_allocation is very possible to
have a restricting mask compared to the one passed in (say "no highmem"
or even GFP_DMA) and you now discard this... probably better would be to
calculate a set of "transient" flags that you then or into the
sk_allocation mask at this time...

Greetings,
   Arjan van de Ven

-- 
if you want to mail me at work (you don't), use arjan (at) linux.intel.com
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