netdev - Re: [PATCH v2] filter: added BPF random opcode

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Message-Id: <20140422.212926.1630952101567041636.davem@davemloft.net>
Date:	Tue, 22 Apr 2014 21:29:26 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	chema@...gle.com
Cc:	edumazet@...gle.com, dborkman@...hat.com, ast@...mgrid.com,
	netdev@...r.kernel.org
Subject: Re: [PATCH v2] filter: added BPF random opcode

From: Chema Gonzalez <chema@...gle.com>
Date: Mon, 21 Apr 2014 09:21:24 -0700

> Added a new ancillary load (bpf call in eBPF parlance) that produces
> a 32-bit random number. We are implementing it as an ancillary load
> (instead of an ISA opcode) because (a) it is simpler, (b) allows easy
> JITing, and (c) seems more in line with generic ISAs that do not have
> "get a random number" as a instruction, but as an OS call.
> 
> The main use for this ancillary load is to perform random packet sampling.
> 
> Signed-off-by: Chema Gonzalez <chema@...gle.com>

Applied.
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