Re: [systemd-devel] nilfs-cleanerd startup on boot

[Ryusuke Konishi <konishi.ryusuke-Zyj7fXuS5i5L9jVzuh4AOg@public.gmane.org>]

Hi

On 2015/03/04 0:44, dennis.murata-uxC5H9eHYlcAvxtiuMwx3w@public.gmane.org wrote:
> I had mis-typed the address for the nilfs mail group
>
>> -----Original Message-----
>> From: Lennart Poettering [mailto:lennart-mdGvqq1h2p+GdvJs77BJ7Q@public.gmane.org]
>> Sent: Saturday, February 28, 2015 12:34 PM
>> To: Dennis Murata (WT01 - ENU)
>> Cc: systemd-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org; linus-nilfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
>> Subject: Re: [systemd-devel] nilfs-cleanerd startup on boot
>>
>> On Fri, 27.02.15 18:31, dennis.murata-uxC5H9eHYlcAvxtiuMwx3w@public.gmane.org
>> (dennis.murata-uxC5H9eHYlcAvxtiuMwx3w@public.gmane.org) 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?

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.

/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
> --
> To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in
> the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

--
To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html