From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ozlabs.org (ozlabs.org [203.10.76.45]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mx.ozlabs.org", Issuer "CA Cert Signing Authority" (verified OK)) by bilbo.ozlabs.org (Postfix) with ESMTPS id 2BCA7B727B for ; Sat, 20 Jun 2009 08:29:59 +1000 (EST) 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 8730DDDD1B for ; Sat, 20 Jun 2009 08:29:58 +1000 (EST) Subject: Re: [PowerPC] 2.6.30-git14 boot failure with SLAB From: Benjamin Herrenschmidt To: Sachin Sant In-Reply-To: <4A3BC57B.8000408@in.ibm.com> References: <4A3B615F.8090504@in.ibm.com> <4A3BC57B.8000408@in.ibm.com> Content-Type: text/plain Date: Sat, 20 Jun 2009 08:29:40 +1000 Message-Id: <1245450580.16880.12.camel@pasglop> Mime-Version: 1.0 Cc: linuxppc-dev@ozlabs.org, Pekka Enberg , linux-kernel List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Fri, 2009-06-19 at 22:36 +0530, Sachin Sant wrote: > The offending commit seems to be > c868d550115b9ccc0027c67265b9520790f05601. > mm: Move pgtable_cache_init() earlier > > If i revert this commit, the machine boots fine. That is strange. If I revert that commit, I get breakages on machines here. It would be interesting to understand what the problem is here, as we -do- use that kmem cache for allocating page tables, so we do need it initialized that early. (IE, we can't allow vmalloc for example to be called before the page table caches are initialized). This will need more debugging and understanding as to why it hangs. Cheers, Ben.