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[195.135.220.15]) by mx.google.com with ESMTPS id c4si1449583edb.409.2019.02.19.05.20.27 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 19 Feb 2019 05:20:27 -0800 (PST) Received-SPF: pass (google.com: domain of jack@suse.cz designates 195.135.220.15 as permitted sender) client-ip=195.135.220.15; Authentication-Results: mx.google.com; spf=pass (google.com: domain of jack@suse.cz designates 195.135.220.15 as permitted sender) smtp.mailfrom=jack@suse.cz X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 0C408AC8A; Tue, 19 Feb 2019 13:20:27 +0000 (UTC) Received: by quack2.suse.cz (Postfix, from userid 1000) id 3583A1E1570; Tue, 19 Feb 2019 14:20:26 +0100 (CET) Date: Tue, 19 Feb 2019 14:20:26 +0100 From: Jan Kara To: Meelis Roos Cc: Jan Kara , "Theodore Y. Ts'o" , linux-alpha@vger.kernel.org, LKML , linux-block@vger.kernel.org, linux-mm@kvack.org Subject: Re: ext4 corruption on alpha with 4.20.0-09062-gd8372ba8ce28 Message-ID: <20190219132026.GA28293@quack2.suse.cz> 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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4e015688-8633-d1a0-308b-ba2a78600544@linux.ee> User-Agent: Mutt/1.10.1 (2018-07-13) 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: On Tue 19-02-19 14:17:09, Meelis Roos wrote: > > > > > The result of the bisection is > > > > > [88dbcbb3a4847f5e6dfeae952d3105497700c128] blkdev: avoid migration stalls for blkdev pages > > > > > > > > > > Is that result relevant for the problem or should I continue bisecting between 4.20.0 and the so far first bad commit? > > > > > > > > Can you try reverting the commit and see if it makes the problem go away? > > > > > > Tried reverting it on top of 5.0.0-rc6-00153-g5ded5871030e and it seems > > > to make the kernel work - emerge --sync succeeded. > There is more to it. > > After running 5.0.0-rc6-00153-g5ded5871030e-dirty (with the revert of > that patch) successfully for Gentoo update, I upgraded the kernel to > 5.0.0-rc7-00011-gb5372fe5dc84-dirty (todays git + revert of this patch) > and it broke on rsync again: > > RepoStorageException: command exited with status -6: rsync -a --link-dest /usr/portage --exclude=/distfiles --exclude=/local --exclude=/lost+found --exclude=/packages --exclude /.tmp-unverified-download-quarantine /usr/portage/ /usr/portage/.tmp-unverified-download-quarantine/ > > Nothing in dmesg. > > This means the real root reason is somewhere deeper and reverting this > commit just made it less likely to happen. Thanks for information. Yeah, that makes somewhat more sense. Can you ever see the failure if you disable CONFIG_TRANSPARENT_HUGEPAGE? Because your findings still seem to indicate that there' some problem with page migration and Alpha (added MM list to CC). Honza -- Jan Kara SUSE Labs, CR