From: Johannes Bauer Subject: Re: Frequent ext4 oopses with 4.4.0 on Intel NUC6i3SYB Date: Tue, 4 Oct 2016 21:02:27 +0200 Message-ID: References: <20161004084136.GD17515@quack2.suse.cz> <90dfe18f-9fe7-819d-c410-cdd160644ab7@gmx.de> <2b7d6bd6-7d16-3c60-1b84-a172ba378402@gmx.de> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Cc: Jan Kara , linux-ext4@vger.kernel.org, linux-mm@kvack.org To: Andrey Korolyov Return-path: Received: from mout.gmx.net ([212.227.17.22]:54446 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751795AbcJDTCh (ORCPT ); Tue, 4 Oct 2016 15:02:37 -0400 In-Reply-To: Sender: linux-ext4-owner@vger.kernel.org List-ID: On 04.10.2016 20:45, Andrey Korolyov wrote: > On Tue, Oct 4, 2016 at 8:32 PM, Johannes Bauer wrote: >> On 04.10.2016 18:50, Johannes Bauer wrote: >> >>> Uhh, that sounds painful. So I'm following Ted's advice and building >>> myself a 4.8 as we speak. >> >> Damn bad idea to build on the instable target. Lots of gcc segfaults and >> weird stuff, even without a kernel panic. The system appears to be >> instable as hell. Wonder how it can even run and how much of the root fs >> is already corrupted :-( >> >> Rebuilding 4.8 on a different host. > > Looks like a platform itself is somewhat faulty: [1]. Thanks for the hint, I'll post there as well. The device is less than 4 weeks old, so it's still under full warranty. Maybe it really is the HW and I'll return it. > Also please bear > in mind that standalone memory testers would rather not expose certain > classes of memory failures, I`d suggest to test allocator`s work > against gcc runs on tmpfs, almost same as you did before. Frequency of > crashes due to wrong pointer contents of an fs cache is most probably > a direct outcome from its relative memory footprint. I will and did, but strangely some kernel building on /dev/shm worked really nice. I Ctrl-Ced, rebooted for good measure and rsynced the 4.8.0 on the device. Then, I tried to update-initramfs: nuc [/lib/modules]: update-initramfs -u update-initramfs: Generating /boot/initrd.img-4.4.0-21-generic modinfo: ERROR: could not get modinfo from 'qla3xxx': Invalid argument Segmentation fault Segmentation fault modinfo: ERROR: could not get modinfo from 'mpt3sas': Invalid argument modinfo: ERROR: could not get modinfo from 'pktcdvd': No such file or directory Bus error Bus error Bus error Bus error Bus error Bus error Bus error Bus error Bus error Bus error Bus error Bus error [...] Segmentation fault Segmentation fault Segmentation fault Segmentation fault update-initramfs: failed for /boot/initrd.img-4.4.0-21-generic with 139. update-initramfs causes heavy disk I/O, so really maybe it's something with the disk driver. As of now I really can't get 4.8.0 to even get to a point where it'd be bootable. I'll continue fighting on all fronts and report as soon as I learn more. Thanks for the help, it is very much appreciated. Cheers, Joe