From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from zps36.corp.google.com (zps36.corp.google.com [172.25.146.36]) by smtp-out.google.com with ESMTP id m3BDn4Gj024302 for ; Fri, 11 Apr 2008 14:49:04 +0100 Received: from fg-out-1718.google.com (fge13.prod.google.com [10.86.5.13]) by zps36.corp.google.com with ESMTP id m3BDn0Ai028543 for ; Fri, 11 Apr 2008 06:49:01 -0700 Received: by fg-out-1718.google.com with SMTP id 13so374747fge.20 for ; Fri, 11 Apr 2008 06:49:00 -0700 (PDT) Message-ID: Date: Fri, 11 Apr 2008 09:49:00 -0400 From: "Ross Biro" Subject: Re: [PATCH 1/2] MM: Make Page Tables Relocatable -- conditional flush In-Reply-To: <20080410172603.98224DCA40@localhost> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20080410172603.98224DCA40@localhost> Sender: owner-linux-mm@kvack.org Return-Path: To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, rossb@google.com, akpm@linux-foundation.org List-ID: On Thu, Apr 10, 2008 at 1:26 PM, Ross Biro wrote: > rcu cleanup. There still appears to be a race, but it looks like it's > in the rcu code. If I reduce the migration code to > > down_interruptible() > synchronize_rcu() > up() > > I still get a crash about once every 1-2 million times through the > loop. If the race is in my code, it's something stupid. Otherwise > it's elsewhere and my code won't make things anyworse. This race appears to have been fixed between 2.6.25rc5-mm1 and 2.6.25rc8-mm1. I've been running the later over night and have over 7 million iterations with out a crash. Ross -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org