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Date:   Tue, 27 Nov 2018 09:31:55 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Marek Habersack <grendel@...stedcode.net>
Cc:     Theodore Ts'o <tytso@....edu>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: ext4 file system corruption with v4.19.3 / v4.19.4

On Tue, Nov 27, 2018 at 03:48:19PM +0100, Marek Habersack wrote:
> On 27/11/2018 15:32, Guenter Roeck wrote:
> Hi,
> 
> You might try to see if you have CONFIG_SCSI_MQ_DEFAULT=yes in your kernel config. Starting with 4.19.1 it somehow

Yes, it is enabled in my configuration.

> interferes with ext4 and causes problems similar to the ones you list below. Ever since I disabled MQ (either recompile
> your kernel or add `scsi_mod.use_blk_mq=0` to the kernel command line) none of those errors came back.
> 
I'll try that. Thanks a lot for the hint!

Guenter

> hope it helps,
> 
> marek
> > [trying again, this time with correct kernel.org address]
> > 
> > Hi,
> > 
> > I have seen the following and similar problems several times,
> > with both v4.19.3 and v4.19.4:
> > 
> > Nov 23 04:32:25 mars kernel: [112668.673671] EXT4-fs error (device sdb1): ext4_iget:4831: inode #12602889: comm git: bad
> > extra_isize 33661 (inode size 256)
> > Nov 23 04:32:25 mars kernel: [112668.675217] Aborting journal on device sdb1-8.
> > Nov 23 04:32:25 mars kernel: [112668.676681] EXT4-fs (sdb1): Remounting filesystem read-only
> > Nov 23 04:32:25 mars kernel: [112668.808886] EXT4-fs error (device sdb1): ext4_iget:4831: inode #12602881: comm rm: bad
> > extra_isize 33685 (inode size 256)
> > ...
> > 
> > Nov 25 00:12:43 saturn kernel: [59377.725984] EXT4-fs error (device sda1): ext4_lookup:1578: inode #238034131: comm
> > updatedb.mlocat: deleted inode referenced: 238160407
> > Nov 25 00:12:43 saturn kernel: [59377.766638] Aborting journal on device sda1-8.
> > Nov 25 00:12:43 saturn kernel: [59377.779372] EXT4-fs (sda1): Remounting filesystem read-only
> > ...
> > 
> > Nov 24 01:52:31 saturn kernel: [189085.240016] EXT4-fs error (device sda1): ext4_lookup:1578: inode #52038457: comm
> > nfsd: deleted inode referenced: 52043796
> > Nov 24 01:52:31 saturn kernel: [189085.263427] Aborting journal on device sda1-8.
> > Nov 24 01:52:31 saturn kernel: [189085.275313] EXT4-fs (sda1): Remounting filesystem read-only
> > 
> > 
> > The same systems running v4.18.6 never experienced a problem.
> > 
> > Has anyone else seen similar problems ? Is there anything I can do
> > to help tracking down the problem ?
> > 
> > Thanks,
> > Guenter
> > 
> 

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