Re: Strange "flush" process bahaviour

[Piotr Szymaniak <szarpaj-TbOm9Ca2r9GrDJvtcaxF/A@public.gmane.org>]

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On Fri, Mar 29, 2013 at 03:29:17PM +0400, Vyacheslav Dubeyko wrote:
> I haven't any special additional configuration options for MagicSysRq in
> my kernel configuration. It is simply enabled.
> 
> As I see (https://www.kernel.org/doc/Documentation/sysrq.txt), it is
> possible to define log level by means of setting value
> in /proc/sys/kernel/sysrq. I have "1" (enable all functions of sysrq) in
> this file. Maybe, have you another log level on your side?

Than this must depend on some different option as I also have "1" in
/proc/sys/kernel/sysrq.


> > ~ # mount
> > rootfs on / type rootfs (rw)
> > /dev/sda3 on / type nilfs2 (rw,noatime,nodiratime,gcpid=16150)
> > proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
> > tmpfs on /run type tmpfs (rw,nosuid,nodev,relatime,mode=755)
> > udev on /dev type devtmpfs (rw,nosuid,relatime,size=10240k,nr_inodes=221714,mode=755)
> > devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620)
> > shm on /dev/shm type tmpfs (rw,nosuid,nodev,noexec,relatime)
> > sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
> > /dev/mapper/chome on /home type btrfs (rw,noatime)
> > 
> 
> I see two nilfs_cleanerd deamons from "ps ax" output:
> 
> 1520 ?        Ss     0:25 /sbin/nilfs_cleanerd -c /etc/nilfs_cleanerd.conf /dev/disk/by-uuid/f18e80b1-f3c1-49ec-baa5-39c0edc4c0b9
> 16150 ?        Ss     0:00 /sbin/nilfs_cleanerd -n /dev/sda3 /
> 
> But I can't understand what partition is serviced by nilfs_cleanerd with
> pid #1520. Could you share more details about it?

~ # readlink /dev/disk/by-uuid/f18e80b1-f3c1-49ec-baa5-39c0edc4c0b9
../../sda3

I suppose that this is caused by manually (well, by script, but it's not
"remount") running nilfs_cleanerd on system startup on that device.
After that there was a remount that started second cleaner. And it seems
that this was yesterday:
~ # ps aux | grep nilfs
root      1520  0.0  0.0   2572  1032 ?        Ss   Feb17   0:25
/sbin/nilfs_cleanerd -c /etc/nilfs_cleanerd.conf
/dev/disk/by-uuid/f18e80b1-f3c1-49ec-baa5-39c0edc4c0b9
root     16150  0.0  0.0   2348   796 ?        Ss   Mar28   0:00
/sbin/nilfs_cleanerd -n /dev/sda3 /

I think that running cleanerd manually is already changed to -o remount
on my second machine with nilfs and I just forgot about this one. I had
some issues with that because of missing /dev/root.


Piotr Szymaniak.
-- 
Na  kazda  strzelanine   zakonczona  czyjas  smiercia  przypadaja  trzy
strzelaniny  bez ofiar.  To po prostu  niemozliwe  do  zaakceptowania w
Ameryce. Po prostu nie do zaakceptowania. Musimy cos z tym zrobic.
  -- George W. Bush

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