[ENBD] Not enough magic ???

[Julien Rennard]

On Tue, 2003-12-23 at 12:06, Julien Rennard wrote:
> > > localhost:~# ps -e -o pid,wchan=WIDE-WCHAN-COLUMN -o comm | grep enbd
> > >   643 exit              enbd-client <defunct>
> > >   644 exit              enbd-client <defunct>
> > >   645 lock_page         enbd-client
> > >   642 wait_on_page      enbd-client
> > 
> > Those are kernel memory management functions. The user processes are
> > apparently stuck waiting on memory. Perhaps swap. They are not called
> > from the enbd driver, well, not directly or intentionally, at least.
> > 
> > Can you get any information about your memory situation? At least with
> > "free", and with anything more sophisticated if you can think of it. 
> free result :
>              total       used       free     shared    buffers    
> cached
> Mem:        126644     120328       6316          0       2684     
> 91504
> -/+ buffers/cache:      26140     100504
> Swap:      2546260        264    2545996
> 
> It seem to be at the point to use swap (at the end my kernel is perhaps
> not so good...)
> 
> > But principally I would like to know if that output you have above ever
> > changes. 
> watch "ps -e -o pid,wchan=WIDE-WCHAN-COLUMN -o comm | grep enbd"
> always gives the same result
> 
> one time, running it at hand I get :
>  643 exit              enbd-client <defunct>
>   644 exit              enbd-client <defunct>
>   645 -                 enbd-client
>   642 -                 enbd-client
> 
>  
> > Is this perhaps a shared memory issue? If one client has a locked page
> > and the other is waiting on it, it implies they are communicating
> > through it!
> 
> > Have you lost /dev/zero?
> No, seems to be ok.
> 
> > Can you run "make test" from the enbd suite on its own? Ie. no floppy.
> make test OK (ouff... I haven't tried it before (and I know it's bad!))
> 
Happy new year ! It's starting well : I still have my problem and don't see where it comes from...
Sorry...
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