From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-la0-f53.google.com (mail-la0-f53.google.com [209.85.215.53]) by kanga.kvack.org (Postfix) with ESMTP id DA26D6B006E for ; Thu, 16 Oct 2014 16:16:47 -0400 (EDT) Received: by mail-la0-f53.google.com with SMTP id gq15so3505882lab.26 for ; Thu, 16 Oct 2014 13:16:46 -0700 (PDT) Received: from smtp2.it.da.ut.ee (smtp2.it.da.ut.ee. [2001:bb8:2002:500:20f:1fff:fe04:1bbb]) by mx.google.com with ESMTP id qj5si36355830lbb.89.2014.10.16.13.16.45 for ; Thu, 16 Oct 2014 13:16:45 -0700 (PDT) Date: Thu, 16 Oct 2014 23:16:44 +0300 (EEST) From: Meelis Roos Subject: Re: unaligned accesses in SLAB etc. In-Reply-To: <20141016.160742.1639247937393238792.davem@redhat.com> Message-ID: References: <20141014.173246.921084057467310731.davem@davemloft.net> <20141016.160742.1639247937393238792.davem@redhat.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: David Miller Cc: iamjoonsoo.kim@lge.com, linux-kernel@vger.kernel.org, cl@linux.com, penberg@kernel.org, rientjes@google.com, akpm@linux-foundation.org, linux-mm@kvack.org, sparclinux@vger.kernel.org > > scripts/Makefile.build:352: recipe for target 'sound/modules.order' failed > > make[1]: *** [sound/modules.order] Bus error > > make[1]: *** Deleting file 'sound/modules.order' > > Makefile:929: recipe for target 'sound' failed > > I just reproduced this on my Sun Blade 2500, so it can trigger on UltraSPARC-IIIi > systems too. My bisection led to the folloowing commit but it seems irrelevant (I have no sun4v on these machines): 4ccb9272892c33ef1c19a783cfa87103b30c2784 is the first bad commit commit 4ccb9272892c33ef1c19a783cfa87103b30c2784 Author: bob picco Date: Tue Sep 16 09:26:47 2014 -0400 sparc64: sun4v TLB error power off events However, the following chunk sound slightly suspicious: + if (fault_code & FAULT_CODE_BAD_RA) + goto do_sigbus; + because SIGNUS is what I got. For some machines, it killed chekroot during startup, for some shells under some circumstances, for some sshd. -- Meelis Roos (mroos@linux.ee) -- 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