RE: [PATCH] SN2 user-MMIO CPU migration

From: Brent Casavant <>
Date: 2006-01-26 10:09:31
On Wed, 25 Jan 2006, Brent Casavant wrote:

> Hmm.  I have only scant evidence to go on from the panic output,
> but it looks like "current" (r13) is not equal to the value of "next"
> by the time we get into sn_migrate().  One example run apparently
> has current=e0000030079d8000, next=e000003015990000.

Got it!  We're context switching.  "next" became "current".  No
telling what on earth "next's next" was.  So after calling
ia64_switch_to(next), I have to refer to "current" in order to
access what was "next" before the call.  My brain's all knotted up.

Take 5 following soon.


Brent Casavant                          All music is folk music.  I ain't                        never heard a horse sing a song.
Silicon Graphics, Inc.                    -- Louis Armstrong
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Received on Thu Jan 26 10:10:29 2006

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