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Date:	Tue, 22 Apr 2014 21:29:26 -0400 (EDT)
From:	David Miller <>
Subject: Re: [PATCH v2] filter: added BPF random opcode

From: Chema Gonzalez <>
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 <>

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