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[2620:137:e000::1:9]) by mx.google.com with ESMTPS id 2si11340378edu.19.2019.07.24.13.13.26 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 24 Jul 2019 13:13:26 -0700 (PDT) Received-SPF: neutral (google.com: 2620:137:e000::1:9 is neither permitted nor denied by best guess record for domain of davem@davemloft.net) client-ip=2620:137:e000::1:9; Authentication-Results: mx.google.com; spf=neutral (google.com: 2620:137:e000::1:9 is neither permitted nor denied by best guess record for domain of davem@davemloft.net) smtp.mailfrom=davem@davemloft.net Received: from localhost (unknown [IPv6:2601:601:9f80:35cd::d71]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) (Authenticated sender: davem-davemloft) by shards.monkeyblade.net (Postfix) with ESMTPSA id 85A5B15431990; Wed, 24 Jul 2019 13:13:24 -0700 (PDT) Date: Wed, 24 Jul 2019 13:13:24 -0700 (PDT) Message-Id: <20190724.131324.1545677795217357026.davem@davemloft.net> To: matorola@gmail.com Cc: ldv@altlinux.org, hch@lst.de, khalid.aziz@oracle.com, torvalds@linux-foundation.org, akpm@linux-foundation.org, sparclinux@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 09/16] sparc64: use the generic get_user_pages_fast code From: David Miller In-Reply-To: References: <20190717215956.GA30369@altlinux.org> <20190718.141405.1070121094691581998.davem@davemloft.net> X-Mailer: Mew version 6.8 on Emacs 26.1 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Wed, 24 Jul 2019 13:13:24 -0700 (PDT) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Anatoly Pugachev Date: Wed, 24 Jul 2019 22:32:17 +0300 > the first test where it was discovered was done on my test LDOM named > ttip, hardware (hypervisor) is T5-2 server, running under Solaris 11.4 > OS. > ttip LDOM is debian sparc64 unstable , so with almost all the latest > software (gcc 8.3.0, binutils 2.32.51.20190707-1, debian GLIBC > 2.28-10, etc..) > > For another test, i also installed LDOM with oracle sparc linux > https://oss.oracle.com/projects/linux-sparc/ , but I've to install a > more fresh version of gcc on it first, since system installed gcc 4.4 > is too old for a git kernel (linux-2.6/Documentation/Changes lists gcc > 4.6 as a minimal version), so I choose to install gcc-7.4.0 to /opt/ > (leaving system installed gcc 4.4 under /usr/bin). Compiled and > installed git kernel version, i.e. last tag 5.3.0-rc1 and ran the > test. Kernel still produced oops. I suspect, therefore, that we have a miscompile. Please put your unstripped vmlinux image somewhere so I can take a closer look. Thank you.