From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id DE661B7043 for ; Fri, 25 Sep 2009 19:49:38 +1000 (EST) Subject: Re: 2.6.31-git5 kernel boot hangs on powerpc From: Benjamin Herrenschmidt To: Tejun Heo In-Reply-To: <4ABC86E0.9090807@kernel.org> References: <4AB0D947.8010301@in.ibm.com> <4AB214C3.4040109@in.ibm.com> <1253185994.8375.352.camel@pasglop> <4AB25B61.9020609@kernel.org> <4AB266AF.9080705@in.ibm.com> <4AB49C37.6020003@in.ibm.com> <4AB9DAEC.3060309@in.ibm.com> <4AB9DD8F.1040305@kernel.org> <4ABA2DE2.6000601@kernel.org> <4ABB269F.6020309@in.ibm.com> <4ABB6D33.6060706@kernel.org> <4ABB72BD.9050905@in.ibm.com> <1253826309.7103.461.camel@pasglop> <4ABC376D.1020704@kernel.org> <4ABC6E25.7090904@in.ibm.com> <4ABC73C7.20403@kernel.org> <4ABC7486.8040500@kernel.org> <4ABC7955.2070404@in.ibm.com> <4ABC86E0.9090807@kernel.org> Content-Type: text/plain Date: Fri, 25 Sep 2009 19:48:31 +1000 Message-Id: <1253872111.7103.520.camel@pasglop> Mime-Version: 1.0 Cc: Linux/PPC Development , David Miller List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Fri, 2009-09-25 at 18:01 +0900, Tejun Heo wrote: > > With this patch applied the machine boots OK :-) > > Ah... so, the problem really is too high address. If you've got some > time, it might be interesting to find out how far high is safe. > Might give me a clue about what the problem is but I think I'll just cook up a test case that forcibly vmap something high up and see how it goes from there. It could be a very old bug that nobody ever noticed because our vmalloc space on 64-bit is so huge :-) Cheers, Ben.