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Re: [Xen-devel] [PATCH] [RFC] sysfs support for xen linux

On Wed, 2006-01-11 at 10:50 -0600, Anthony Liguori wrote:
> Mark Williamson wrote:
> >>Yes, true. I think privcmd might be more appropriate for /proc, but
> >>would like to see how it works as a binary file under /sys. ioctl's are
> >>not supported by sysfs that I can see, so privcmd would have to be a
> >>read/write interface.
> >>
> >>Regardless of privcmd there are numerous simple attributes related to
> >>Xen that are consistent with "zen" of sysfs. :-)
> >>    
> >>
> >
> >Agreed.  It's an ideal place for many of the things that are in proc, and 
> >many 
> >things we'd want to add in the future.
> >
> >You could possibly abuse sysfs into supporting ioctl but I'm pretty sure the 
> >kernel people would find that quite distressing ;-)  I had the impression 
> >binary files under sysfs were also a no-no (all meant to be cat-able - 
> >addressing one of the other problems of /proc), but I could be mistaken.
> >  
> >
> There was a discussion a while back about this.
> http://permalink.gmane.org/gmane.comp.emulators.xen.devel/14273
> I think the consensus was to move any ioctl interface to a char device 
> and everything else to sysfs.
> You'll probably want a proper kobject hierarchy too which means working 
> with GKH et al to figure out where out stuff should be 
> (/sys/hypervisor/xen??)

I think it would be a good idea if you included lkml in on your
discussions. Why not get their opinions early rather than late?


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