netdev - Re: [stable] net: Handle different key sizes between address families in flow cache

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Date:	Tue, 8 Nov 2011 08:53:17 -0800
From:	Greg KH <greg@...ah.com>
To:	Kim Phillips <kim.phillips@...escale.com>
Cc:	David Miller <davem@...emloft.net>, stable@...r.kernel.org,
	eric.dumazet@...il.com, zheng.z.yan@...el.com,
	netdev@...r.kernel.org, David Ward <david.ward@...mit.edu>
Subject: Re: [stable] net: Handle different key sizes between address
 families in flow cache

On Fri, Nov 04, 2011 at 09:29:58PM -0500, Kim Phillips wrote:
> On Fri, 4 Nov 2011 14:24:39 -0700
> Greg KH <greg@...ah.com> wrote:
> 
> > On Fri, Nov 04, 2011 at 02:46:59PM -0500, Kim Phillips wrote:
> > > commit aa1c366e4febc7f5c2b84958a2dd7cd70e28f9d0 upstream.
> > > 
> > > With the conversion of struct flowi to a union of AF-specific structs, some
> > > operations on the flow cache need to account for the exact size of the key.
> > > 
> > > Signed-off-by: David Ward <david.ward@...mit.edu>
> > > Signed-off-by: David S. Miller <davem@...emloft.net>
> > > Cc: stable@...r.kernel.org # v3.0.x
> > > ---
> > > This patch is the result of a clean cherry-pick onto v3.0.8.
> > > It restores IPSec fwding performance from ~4kpps back to ~44kpps on
> > > a P2020DS board.
> > 
> > Too bad you forgot to build this patch after you applied it:
> >   CC      init/main.o
> > In file included from include/linux/security.h:39:0,
> >                  from init/main.c:32:
> > include/net/flow.h: In function 'flow_key_size':
> > include/net/flow.h:174:3: error: size of unnamed array is negative
> > include/net/flow.h:177:3: error: size of unnamed array is negative
> > 
> > Please be kind to your poor over-worked stable kernel maintainer and do
> > the decent thing and TEST YOUR PATCH before you ask him to accept it.
> > 
> > bah, I think it's time for the weekend to start a bit earlier than normal...
> 
> so sorry I hadn't tested 64-bit.
> 
> I found the problem - upstream commit aa1c366 depends on
> upstream commit 728871b:
> 
> commit 728871bc05afc8ff310b17dba3e57a2472792b13
> Author: David Ward <david.ward@...mit.edu>
> Date:   Mon Sep 5 16:47:23 2011 +0000
> 
>     net: Align AF-specific flowi structs to long
>     
>     AF-specific flowi structs are now passed to flow_key_compare, which must
>     also be aligned to a long.
>     
>     Signed-off-by: David Ward <david.ward@...mit.edu>
>     Signed-off-by: David S. Miller <davem@...emloft.net>
> 
> so, one more time, in stable sign-off area format:
> 
> Cc: <stable@...r.kernel.org> # v3.0.x: 728871b: net: Align AF-specific flowi structs to long
> Cc: <stable@...r.kernel.org> # v3.0.x
> 
> build tested on 32- and 64-bit powerpc, and ARCH=x86
> {i386,x86_64}_defconfig.

Can you please resend the original patch I needed to apply here as well?
It's long-gone in my deleted inbox.

thanks,

greg k-h
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