From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932070AbVHMA4s (ORCPT ); Fri, 12 Aug 2005 20:56:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932073AbVHMA4s (ORCPT ); Fri, 12 Aug 2005 20:56:48 -0400 Received: from smtp202.mail.sc5.yahoo.com ([216.136.129.92]:41868 "HELO smtp202.mail.sc5.yahoo.com") by vger.kernel.org with SMTP id S932070AbVHMA4r (ORCPT ); Fri, 12 Aug 2005 20:56:47 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com.au; h=Received:Message-ID:Date:From:User-Agent:X-Accept-Language:MIME-Version:To:CC:Subject:References:In-Reply-To:Content-Type:Content-Transfer-Encoding; b=0YwjAV/22rmPBy+ME8MwEm7/To2SBcV6y180b+PPxCWzVc67VscQpUVi7ZvLy5M222FqJOtGfok4hslpudQFJrIAkdgzxnwYa3x75pNmDLmifA5gX1prVPsMLZudUsJJjZYOIXKxYnAE2JOrirDAhzbWoDDDvNbi6eZ/jq7cVXQ= ; Message-ID: <42FD4548.3060204@yahoo.com.au> Date: Sat, 13 Aug 2005 10:56:40 +1000 From: Nick Piggin User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.8) Gecko/20050513 Debian/1.7.8-1 X-Accept-Language: en MIME-Version: 1.0 To: george@mvista.com CC: lkml , Andrew Morton Subject: Re: [PATCH] eliminte NMI entry/ exit code References: <42FD42C1.6040009@mvista.com> In-Reply-To: <42FD42C1.6040009@mvista.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org George Anzinger wrote: > The NMI entry and exit code fiddles with bits in the preempt count. If > an NMI happens while some other code is doing the same, bits will be > lost. This patch removes this modify code from the NMI path till we can > come up with something better. > Humour me for a minute here... NMI restores preempt_count back to its old value upon exit, right? So what does a race case look like? Nick -- SUSE Labs, Novell Inc. Send instant messages to your online friends http://au.messenger.yahoo.com