Re: [Linux-ia64] TODO list

From: David Mosberger <davidm_at_hpl.hp.com>
Date: 2001-02-10 07:04:42
>>>>> On Fri, 9 Feb 2001 12:01:45 -0800, Don Dugger <n0ano@valinux.com> said:

  Don> It also isn't as easy to do as you might think.  We were
  Don> looking into this at one time and you have to be really
  Don> carefull about stack management because you can wind up running
  Don> in kernel mode with a user stack pointer.  This would cause
  Don> serious problems when an interrupt comes in.

While I agree with the sentiment, I'd phrase it a little differently:
it's not difficult to fix the assumption of "psr.cpl==0 => we're on
the kernel stack".  The difficulty is in proving that you fixed all
the code that made that assumption...

	--david
Received on Fri Feb 09 12:06:49 2001

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