From mboxrd@z Thu Jan 1 00:00:00 1970 From: Benjamin Herrenschmidt Subject: Re: [PATCH/RFC] net: Add __napi_sycnhronize() to sync with napi poll Date: Tue, 16 Oct 2007 17:37:03 +1000 Message-ID: <1192520223.7205.5.camel@pasglop> References: Reply-To: benh@kernel.crashing.org Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Cc: shemminger@linux-foundation.org, netdev@vger.kernel.org, davem@davemloft.net, rdreier@cisco.com, linuxppc-dev@ozlabs.org To: Herbert Xu Return-path: Received: from gate.crashing.org ([63.228.1.57]:54079 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755389AbXJPHhm (ORCPT ); Tue, 16 Oct 2007 03:37:42 -0400 In-Reply-To: Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Tue, 2007-10-16 at 14:06 +0800, Herbert Xu wrote: > Benjamin Herrenschmidt wrote: > > > > Note: I use msleep_interruptible(1); just like napi_disable(). However > > I'm not too happy that the "hot" loop that results of a pending signal > > here will spin without even a cpu_relax ... what do you guys think would > > be the best way to handle this ? > > Well since the loop does not check signals at all, it should > just use msleep. > > Granted the process will end up in the D state and contribute > to the load average. But if this loop executes long enough > for that to be noticed then we've got bigger problems to worry > about. If Dave & Stephen agree, I'll send a patch changing napi_disable() too then. Cheers, Ben.