Re: [PATCH] DevFS support for /dev/cpu/X/(cpuid|msr)

From: H. Peter Anvin (
Date: Sun Jan 06 2002 - 16:12:45 EST

Richard Gooch wrote:

>>If you don't understand why this is idiotic, then let me enlighten you:
>>there is no sensible reason why /dev/cpu/%d should only be populated
>>after having run a CPU-dependent device driver. /dev/cpu/%d should be
>>always populated; heck, that's the only way you can sensibly handle
>>hotswapping CPUs.
> I've already privately told Matt that it would be nice if creation of
> /dev/cpu/%d was handled by generic boot code, and not a driver.
> However, I don't see that as essential for the CPUID and MSR drivers.

I don't see putting a lot of devfs shit into the CPUID and MSR drivers
as essential in any shape, way or form. Do it right or don't do it at all.


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