From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lb0-f179.google.com (mail-lb0-f179.google.com [209.85.217.179]) by kanga.kvack.org (Postfix) with ESMTP id 9D5DF6B0069 for ; Tue, 14 Oct 2014 17:19:38 -0400 (EDT) Received: by mail-lb0-f179.google.com with SMTP id l4so8939839lbv.38 for ; Tue, 14 Oct 2014 14:19:38 -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 l1si28081634lbj.70.2014.10.14.14.19.36 for ; Tue, 14 Oct 2014 14:19:37 -0700 (PDT) Date: Wed, 15 Oct 2014 00:19:36 +0300 (EEST) From: mroos@linux.ee Subject: Re: unaligned accesses in SLAB etc. In-Reply-To: <20141013.200416.641735303627599182.davem@davemloft.net> Message-ID: References: <20141012.132012.254712930139255731.davem@davemloft.net> <20141013235219.GA11191@js1304-P5Q-DELUXE> <20141013.200416.641735303627599182.davem@davemloft.net> 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 > > I'd like to know that your another problem is related to commit > > bf0dea23a9c0 ("mm/slab: use percpu allocator for cpu cache"). So, > > if the commit is reverted, your another problem is also gone > > completely? > > The other problem has been present forever. Umm? I am afraid I have been describing it badly. This random SIGBUS+SIGSEGV problem is new - I have not seen it before. I have been able to do kernel compiles for years on sparc64 (modulo specific bugs in specific configurations) and 3.17 + start/end swap patch seems also stable for most machine. With yesterdays git + align patch, it dies with SIGBUS multiple times during compilation so it's a new regression for me. Will try reverting that commit tomorrow. My only other current sparc64 problems that I am seeing - V210/V440 die during bootup if compiled with gcc 4.9 and V480 dies with FATAL exceptions during bootups since previous kernel release. Maybe also exit_mmap warning - I do not know if they have been fixed, I see them rarely. -- 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