Re: FS-specified FSID for non-device based filesystems?

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On Sunday April 16, greg@xxxxxxxxx wrote:
> On Mon, Apr 17, 2006 at 10:54:06AM +1000, Neil Brown wrote:
> >  - filesystems don't have a place in /sys
> 
> Then what is /sys/fs/ for?  :)

good question!

adams # uname -a 
Linux adams 2.6.17-rc1-mm1 #298 SMP Tue Apr 11 14:19:52 EST 2006 i686 GNU/Linux
adams # ls -la /sys/fs
total 0
drwxr-xr-x   2 root root 0 Apr 17 14:23 .
drwxr-xr-x  11 root root 0 Apr 17 14:23 ..

Doesn't look very useful yet, but I'm hopeful.

What naming scheme is expected?  i.e. If I want to look at the nfs
client rpc stats for /import/warehouse,  where would I look?
  /sys/fs/import/warehouse/nfs/stats
seems unlikely.

The idea of putting filesystem stuff in /sys seem to come up on
linux-kernel every so often and it never seems to get anywhere, often
because Al Viro pokes obvious holes in the scheme.

I cannot find anything in Documentation/filesystems/sysfs.txt, so:
How is /sys/fs supposed to work?

Thanks,
NeilBrown
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