From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755651AbaCZAqb (ORCPT ); Tue, 25 Mar 2014 20:46:31 -0400 Received: from shards.monkeyblade.net ([149.20.54.216]:33115 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754880AbaCZAqa (ORCPT ); Tue, 25 Mar 2014 20:46:30 -0400 Date: Tue, 25 Mar 2014 20:46:28 -0400 (EDT) Message-Id: <20140325.204628.1622839093852736075.davem@davemloft.net> To: hpa@linux.intel.com Cc: dborkman@redhat.com, ast@plumgrid.com, netdev@vger.kernel.org, hagen@jauu.net, keescook@chromium.org, pmoore@redhat.com, mingo@kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH net-next v2 8/9] net: filter: rework/optimize internal BPF interpreter's instruction set From: David Miller In-Reply-To: <53321E3B.8080709@linux.intel.com> References: <1395749457-16178-9-git-send-email-dborkman@redhat.com> <20140325.201712.1651156258234145348.davem@davemloft.net> <53321E3B.8080709@linux.intel.com> X-Mailer: Mew version 6.5 on Emacs 24.3 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.7 (shards.monkeyblade.net [149.20.54.216]); Tue, 25 Mar 2014 17:46:29 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "H. Peter Anvin" Date: Tue, 25 Mar 2014 17:24:27 -0700 > If you allow loops, it greatly increases the expressibility of the > language, but we would really need another control to limit CPU usage. We don't want super expressibility. We want an extremely simple, trivial to validate, filtering language.