netdev - Re: [PATCH v3] ARM: net: JIT compiler for packet filters

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Message-Id: <20111228.134115.1976002751167690328.davem@davemloft.net>
Date:	Wed, 28 Dec 2011 13:41:15 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	mgherzan@...il.com
Cc:	linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
	linux@....linux.org.uk
Subject: Re: [PATCH v3] ARM: net: JIT compiler for packet filters

From: Mircea Gherzan <mgherzan@...il.com>
Date: Wed, 28 Dec 2011 16:51:34 +0100

> Am 20.12.2011 19:55, schrieb David Miller:
>> From: Mircea Gherzan<mgherzan@...il.com>
>> Date: Tue, 20 Dec 2011 19:04:23 +0100
>>
>>> Based of Matt Evans's PPC64 implementation.
>>>
>>> The compiler generates ARM instructions but interworking is
>>> supported for Thumb2 kernels.
>>>
>>> Supports both little and big endian. Unaligned loads are emitted
>>> for ARMv6+. Not all the BPF opcodes that deal with ancillary data
>>> are supported. The scratch memory of the filter lives on the stack.
>>> Hardware integer division is used if it is available.
>>>
>>> Enabled in the same way as for x86-64 and PPC64:
>>>
>>> 	echo 1>  /proc/sys/net/core/bpf_jit_enable
>>>
>>> A value greater than 1 enables opcode output.
>>>
>>> Signed-off-by: Mircea Gherzan<mgherzan@...il.com>
>>
>> I'm happy with this going in via the ARM tree once all the details
>> are worked out:
> 
> I do not really care that much about the tree where this is going, as
> long as it gets into 3.3 :) If you want to take it via the -net tree,
> please synchronize with Russell (I've uploaded the patch to his
> tracking system [1]).

I think it's much easier if this goes via the ARM tree, so I ask that
the ARM folks pull this patch in.

Acked-by: David S. Miller <davem@...emloft.net>

Thanks.
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