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Date: Tue, 10 Apr 2001 19:23:28 +0200
From: Andi Kleen <ak@suse.de>
To: Imran.Patel@nokia.com
Cc: ak@suse.de, netfilter-devel@us5.samba.org, netdev@oss.sgi.com,
        linux-kernel@vger.kernel.org
Subject: Re: skb allocation problems
Message-ID: <20010410192328.A21887@gruyere.muc.suse.de>
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In-Reply-To: <2D6CADE9B0C6D411A27500508BB3CBD063CF0D@eseis15nok>; from Imran.Patel@nokia.com on Tue, Apr 10, 2001 at 07:27:29PM +0300
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On Tue, Apr 10, 2001 at 07:27:29PM +0300, Imran.Patel@nokia.com wrote:
> > On Mon, Apr 09, 2001 at 07:03:46PM +0300, Imran.Patel@nokia.com wrote:
> > > I have written a test module which closely mirrors what my 
> > code tries to
> > > do(attached below). This is what i get:
> > > 
> > > PRE_R: old skb:c371ee40  new skb:c371ee30 
> > 
> > I guess oldskb->len is <=0xc, and the slab allocator packs 
> > them near together
> > in the same zone.
> 
> nope. i have checked it, the length of the older skb is perfectly ok.....and
> i even found that this weird behaviour happens only when the old skb buffer
> length is between 80 and 224 bytes. 

Well, I don't know then. You have to debug it. It's probably something stupid
(if fundamental services like alloc_skb/kfree_skb were completely buggy
someone surely would have noticed earlier)

-Andi
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