From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: sparc64 mystery with Cheetah+ D-cache parity error (n_tty_set_termios, bpf_check, cheetah_copy_page_insn) Date: Wed, 10 Oct 2018 10:08:57 -0700 (PDT) Message-ID: <20181010.100857.951754034539960711.davem@davemloft.net> References: Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: sparclinux@vger.kernel.org, netdev@vger.kernel.org, gregkh@linuxfoundation.org, jslaby@suse.com To: mroos@linux.ee Return-path: Received: from shards.monkeyblade.net ([23.128.96.9]:39888 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726607AbeJKAcC (ORCPT ); Wed, 10 Oct 2018 20:32:02 -0400 In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: From: Meelis Roos Date: Wed, 10 Oct 2018 16:24:59 +0300 > I have seen multiple strange messages like this, on multiple sparc64 > machines: > > [ 55.523882] CPU[1]: Cheetah+ D-cache parity error at > TPC[0000000000707e8c] > [ 55.626033] TPC > > This specfic one ise from n_tty_set_termios and it is currently > repeatable on a Sun V210. > I have seen these on V245 and V445 too, with different addresses. On > V445, the same address caused > errors on multiple CPUs so it does not seem like a hardware problem, > rather something software releated, > that's why I am reporting it here. > > On V445 it is gone with my current custom kernels but was there with > 4.16.0-1-sparc64-smp Debian kernel package, > probabaly because I do not have bpfilter compiled in: I just started getting my older machines up again and I get these kinds of errors sometimes too, usually in the TSB copy routine. I'll definitely be looking into this and thanks for the report and data.