From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matt Mackall Subject: Re: 2.6.23 WARNING: at kernel/softirq.c:139 local_bh_enable() Date: Fri, 23 Nov 2007 14:09:13 -0600 Message-ID: <20071123200913.GE19691@waste.org> References: <20071123105518.GA22062@2ka.mipt.ru> <20071123170756.GV19691@waste.org> <20071123175757.GA23991@2ka.mipt.ru> <20071123184851.GA14415@2ka.mipt.ru> <20071123185101.GA17582@2ka.mipt.ru> <20071123185906.GA23710@2ka.mipt.ru> <20071123191120.GA19691@waste.org> <20071123193222.GA22168@2ka.mipt.ru> <20071123194139.GC19691@waste.org> <20071123195410.GA11401@2ka.mipt.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Andrew Morton , Simon Arlott , Linux Kernel Mailing List , netdev@vger.kernel.org, Ingo Molnar To: Evgeniy Polyakov Return-path: Received: from waste.org ([66.93.16.53]:34945 "EHLO waste.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757086AbXKWUQi (ORCPT ); Fri, 23 Nov 2007 15:16:38 -0500 Content-Disposition: inline In-Reply-To: <20071123195410.GA11401@2ka.mipt.ru> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Fri, Nov 23, 2007 at 10:54:11PM +0300, Evgeniy Polyakov wrote: > On Fri, Nov 23, 2007 at 01:41:39PM -0600, Matt Mackall (mpm@selenic.com) wrote: > > Here's another thought: move all this logic into the networking core, > > unify it with current softirq zapper, then allow it to be called from > > various other places (like atomic allocators). Then it'll all be in > > central maintained place with more users. > > This can be done quite easily - put a check into __kfree_skb() if > netpoll is compiled-in and we are in hardirq context, then put skb > into softirq freeing queue. Then zap_completion_queue() can free > anything without ever knowing about nature of the packet, since this > will be checked in __kfree_skb() anyway. What I had in mind was moving the whole zap_completion_queue concept into net/core/skbuff. So that netpoll (and, say, atomic kmalloc) can simply call something like "clean_completion_queue". -- Mathematics is the supreme nostalgia of our time.