Re: [RFC][PATCH 4/5] Documentation: add node files to sysfs ABI

[Greg KH <gregkh@suse.de>]

On Sat, Apr 12, 2008 at 11:41:18AM +0200, Nick Piggin wrote:
> On Fri, Apr 11, 2008 at 04:56:48PM -0700, Greg KH wrote:
> > On Fri, Apr 11, 2008 at 04:49:13PM -0700, Nishanth Aravamudan wrote:
> > > /sys/devices/system/node represents the current NUMA configuration of
> > > the machine, but is undocumented in the ABI files. Add bare-bones
> > > documentation for these files.
> > > 
> > > Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
> > > 
> > > ---
> > > Greg, is something like this what you'd want?
> > 
> > Yes it is, thanks for doing it.
> 
> Can you comment on the aspect of configuring various kernel hugetlb 
> configuration parameters? Especifically, what directory it should go in?
> IMO it should be /sys/kernel/*

I don't really know.

> /sys/devices/system/etc should be fine eg. for showing how many pages are
> available in a given node, or what kinds of TLBs the CPU has, but I would
> have thought that configuring the kernel's hugetlb settings should be
> in /sys/kernel.

/sys/devices/system are for "sysdev" devices, a breed of device
structures that are problimatic to use, and are on my TODO list to
rework.  If you need a hugetlb paramter to be tied to a cpu or other
system device, then it should go under here.

Otherwise, if it is just a "system wide" parameter, then put it in
/sys/kernel/

thanks,

greg k-h

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