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[193.40.6.72]) by mx.google.com with ESMTPS id p69si8101762ljb.75.2019.02.19.05.49.28 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 19 Feb 2019 05:49:28 -0800 (PST) Received-SPF: neutral (google.com: 193.40.6.72 is neither permitted nor denied by best guess record for domain of mroos@linux.ee) client-ip=193.40.6.72; Authentication-Results: mx.google.com; spf=neutral (google.com: 193.40.6.72 is neither permitted nor denied by best guess record for domain of mroos@linux.ee) smtp.mailfrom=mroos@linux.ee Subject: Re: ext4 corruption on alpha with 4.20.0-09062-gd8372ba8ce28 To: Jan Kara Cc: "Theodore Y. Ts'o" , linux-alpha@vger.kernel.org, LKML , linux-block@vger.kernel.org, linux-mm@kvack.org References: <1c26eab4-3277-9066-5dce-6734ca9abb96@linux.ee> <076b8b72-fab0-ea98-f32f-f48949585f9d@linux.ee> <20190216174536.GC23000@mit.edu> <20190218120209.GC20919@quack2.suse.cz> <4e015688-8633-d1a0-308b-ba2a78600544@linux.ee> <20190219132026.GA28293@quack2.suse.cz> From: Meelis Roos Message-ID: <6cd92b22-742d-f6d5-5b6a-180884fbbf20@linux.ee> Date: Tue, 19 Feb 2019 15:49:27 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.1 MIME-Version: 1.0 In-Reply-To: <20190219132026.GA28293@quack2.suse.cz> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: et-EE Content-Transfer-Encoding: 7bit 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: > Thanks for information. Yeah, that makes somewhat more sense. Can you ever > see the failure if you disable CONFIG_TRANSPARENT_HUGEPAGE? HAVE_ARCH_TRANSPARENT_HUGEPAGE [=n] Seems there is no THP on alpha. > Because your > findings still seem to indicate that there' some problem with page > migration and Alpha (added MM list to CC). But my kernel config had memory compaction (that turned on page migration) and bounce buffers. I do not remember why I found them necessary but I will try without them. -- Meelis Roos