From owner-freebsd-arch  Fri Feb  1  0:15:20 2002
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Date: Fri, 01 Feb 2002 00:13:56 -0800
From: Terry Lambert <tlambert2@mindspring.com>
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To: Julian Elischer <julian@elischer.org>
Cc: Daniel Eischen <eischen@pcnet1.pcnet.com>, arch@FreeBSD.ORG
Subject: FWIW... maybe this way already?
References: <Pine.BSF.4.21.0201312320470.64929-100000@InterJet.elischer.org>
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Linux did what I think is an incredibly clever thing.

They put the current CPU at the beginning of the stack,
and then change it when/if they migrate the process.

Since KSEs have stacks, as well, you could put the
process and thread ID after the CPU ID, there.

Saves weirding out a register to get the CPU, PID, TID,
since the stack base is always known.

FWIW.

-- Terry

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