On 2015/03/04 10:11, dennis.murata@xxxxxxxxx wrote:
-----Original Message-----
From: linux-nilfs-owner@xxxxxxxxxxxxxxx [mailto:linux-nilfs-
owner@xxxxxxxxxxxxxxx] On Behalf Of Ryusuke Konishi
Sent: Tuesday, March 03, 2015 6:18 PM
To: Dennis Murata (WT01 - ENU); lennart@xxxxxxxxxxxxxx
Cc: systemd-devel@xxxxxxxxxxxxxxxxxxxxx; linux-nilfs@xxxxxxxxxxxxxxx
Subject: Re: [systemd-devel] nilfs-cleanerd startup on boot
Hi
On 2015/03/04 0:44, dennis.murata@xxxxxxxxx wrote:
I had mis-typed the address for the nilfs mail group
-----Original Message-----
From: Lennart Poettering [mailto:lennart@xxxxxxxxxxxxxx]
Sent: Saturday, February 28, 2015 12:34 PM
To: Dennis Murata (WT01 - ENU)
Cc: systemd-devel@xxxxxxxxxxxxxxxxxxxxx; linus-nilfs@xxxxxxxxxxxxxxx
Subject: Re: [systemd-devel] nilfs-cleanerd startup on boot
On Fri, 27.02.15 18:31, dennis.murata@xxxxxxxxx
(dennis.murata@xxxxxxxxx) wrote:
I have a fedora 21 system that where I mount an nilfs2 file system.
I use a simple /etc/modules-load.d/nilfs.conf file to load the
kernel module and have an entry in the fstab.
Creating the modules-load.d snippet should not be necessary, as the
kernel should autoload the kernel module for it when it is first required.
I did not find this to be the case for fedora 21.
> Without creating the file to load the module, any attempt I made to mount
the file system would get a unknown filetype error. Does this point at >
adding this module to the initrd file?
Is "nilfs2.ko" installed in your environment?
I had to add the kernel-modules-extra package that you list below. This is probably why I also had to add the file in modules-load.d to get this module loaded
Try "modinfo nilfs2"
Older fedora needed kernel-modules-extra package. [1]
[1] http://nilfs.sourceforge.net/en/pkg_fedora.html
The file system mounts on boot as it should, but the nilfs-cleanerd
program does not startup. If I umount /nilfs then mount /nilfs the
nilfs-cleanerd program starts as it should to cleanup the checkpoints.
How is that daemon supposed to be started? Is it forked off /bin/mount?
Does systemd use a different mount program at boot?
It uses /bin/mount for mounting normal file systems.
nilfs_cleanerd is invoked through /sbin/mount.nilfs2 helper. [2] The helper is
called from /sbin/mount if it exists.
What is confusing to me, is an umount then a mount will start the nilfs_cleanerd process so it does exist on the system. I had expected it to be started as soon as the file system was mounted the first time.
Curious. Is /sbin/mount.nilfs2 called in the first mount?
If mount.nilfs2 is unavailable at the early stage, the next best way
is to use rw-remount (i.e. mount -t nilfs2 -o rw,remount <device>
<directory>). It would also run cleanerd instead of umount && mount.
Regards,
Ryusuke Konishi
/sbin/mount.nilfs2 is included in nilfs-utils package.
nilfs_cleanerd is just a user-land process, so it can be manually invoked if you
have root privilege. [3]
# /sbin/nilfs_cleanerd <device> <directory>
But, in this case, you need to kill nilfs_cleanerd manually before umount. So, I
recommend running cleanerd through mount.nilfs2.
The above explanation may not suit for the recent fedora since nilfs-utils is not
yet tuned to systemd environment.
[2] http://nilfs.sourceforge.net/en/man8/mount.nilfs2.8.html
[3] http://nilfs.sourceforge.net/en/man8/nilfs_cleanerd.8.html
Regards,
Ryusuke Konishi
Is there something else that should be included other than the
nilfs.conf file? I have just started using a system with systemd as
the init so please forgive my ignorance.
I have no idea about nilfs really, and we had no reports about any
problems with it before.
I wanted to look at the performance of nilfs and f2fs.
> This is my first try at using these file systems
Lennart
--
Lennart Poettering, Red Hat
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