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Date:   Wed, 06 Sep 2017 14:46:48 +0200
From:   Wolfgang Walter <>
To:     Andreas Dilger <>
Cc:     Ext4 Developers List <>,
        LKML <>
Subject: Re: JBD2: Spotted dirty metadata buffer....

Am Montag, 28. November 2016, 12:26:38 schrieb Wolfgang Walter:
> Am Mittwoch, 23. November 2016, 16:40:07 schrieb Andreas Dilger:
> > On Nov 23, 2016, at 3:43 AM, Wolfgang Walter <> wrote:
> > > Am Dienstag, 22. November 2016, 16:02:53 schrieben Sie:
> > >> On Nov 22, 2016, at 6:56 AM, Wolfgang Walter <> wrote:
> > >>> Am Montag, 21. November 2016, 17:49:36 schrieben Sie:
> > >>>> On Nov 21, 2016, at 8:28 AM, Wolfgang Walter <> wrote:
> > >>>>> Hello,
> [snip]
> > Stepping back a bit - does this problem only happen with an external
> > journal device, or does it also happen with an internal journal?
> > 
> So I tried that this weekend. I got again these messages 
> JBD2: Spotted dirty metadata buffer (dev = dm-22, blocknr = 241763277). There's a risk of filesystem corruption in case of system crash.
> So this also happens with an internal journal.


I last tried with 4.9.46 and I still see that problem when rsyncing data to the filesystem: errors similar to

JBD2: Spotted dirty metadata buffer (dev = dm-25, blocknr = 1008028301). There's a risk of filesystem corruption in case of system 

A later filesystem check does not show any errors.

With 4.9.46 stable kernels I also sometimes get the following error:

EXT4-fs error (device dm-25): ext4_iget:4501: inode #74061557: comm rsync: checksum invalid
EXT4-fs error (device dm-25): ext4_iget:4501: inode #155844677: comm nfsd: checksum invalid

A filesystem check then says that the inode itselfs seems ok but the checksum is indeed wrong.

As these inodes are inodes of very small files.

So I finally copied all away and reinitialized the filesystem. But this time without -O inline_data

Since then all works fine. So I assume there is a proplem with inodes and inline-data (at least until 4.9.46), maybe only with data=journal.

Wolfgang Walter
Studentenwerk München
Anstalt des öffentlichen Rechts

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