[Unionfs] Re: rw nfs branch (Re: unionfs root on nfs)

[Hans-Peter Jansen]

Hi Junjiro-San, hi *,

Am Freitag, 4. November 2005 16:47 schrieb hooanon05 at yahoo.co.jp:
>
> Here is my patch for nfs and procfs, it is against
> unionfs-20051025-2113. I applied it after my rename2.patch + lookup
> patch, both patches are posted to this ml on 27 October.
> nfs patch calls some kernel internal functions, so you need to link
> unionfs statically instead of dynamic module.
> If you meet a problem again, try '#define Debug' in proc.c (new
> file). It will print which process accessed to proc fs.
> Although I tried procfs patch will be available in non-nfs
> environment, I didnt test it much.

I'm desperately seeking a (short time) fix for the /proc problem to get 
my SuSE 9.3 diskless NFS setup going until the unionfs crew come along 
with an "official" fix. How did you solved this in your environment? 
Still based on this patch? The "statically linking" order isn't very 
appealing, since I try very hard to keep the distribution kernel 
untouched, if possible somehow.

I already evaluated these possibilies:
 - server based union:
   no problem with /proc, but server crashes forces all clients to
   reboot, which isn't an option in my setup.. 
 - client based union:
   we all know about the consequences of missing mmap support
   looked into patching startproc, but this is getting somewhat hairy, 
   and only fixes one problem source
   certain tricks with mount --move and pivot_root

None of these approaches fulfils my needs, but startproc patching still 
looks like the most attractive ATM, which I will tackle tomorrow.

Regards,
Pete