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From: Bill Davidsen <>
To: Andi Kleen <>
Cc: Justin Banks <>,
	"Miller, Mike (OS Dev)" <>,
Subject: Re: FW: Linux question
Date: Sat, 08 Mar 2008 12:07:35 -0500	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

Andi Kleen wrote:
> Bill Davidsen <> writes:
>> Here's an interesting question, why isn't there an "online" file for
>> each CPU?
> There are still some problems with off lining CPU #0 on x86 at least,
> that is why it is not allowed. iirc they weren't very difficult so it
> would be probably fixable with some effort.

If that's the case I would think that making it read-only would be a 
better solution, since I found this while creating a little tool to scan 
and see what's online and what's not. Obviously there can be exception 
cases for CPU0 and x86, but I would think that having the CPU0 for x86 
be read-only would be a quirk, and handled in the kernel.

Bill Davidsen <>
  "Woe unto the statesman who makes war without a reason that will still
  be valid when the war is over..." Otto von Bismark 

      reply	other threads:[~2008-03-08 17:02 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-03-06 19:33 Miller, Mike (OS Dev)
2008-03-06 19:51 ` Cyrill Gorcunov
2008-03-06 20:38 ` Justin Banks
2008-03-07 18:43   ` Bill Davidsen
2008-03-07 19:13     ` Justin Banks
2008-03-07 19:14     ` Andi Kleen
2008-03-08 17:07       ` Bill Davidsen [this message]

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