From owner-freebsd-smp  Sun Dec 15 01:10:39 1996
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To: Peter Wemm <peter@spinner.dialix.com>
cc: dyson@freebsd.org, smp@freebsd.org, haertel@ichips.intel.com
Subject: Re: some questions concerning TLB shootdowns in FreeBSD 
In-reply-to: Your message of "Sun, 15 Dec 1996 09:21:55 +0800."
             <199612150121.JAA12763@spinner.DIALix.COM> 
Date: Sun, 15 Dec 1996 10:13:27 +0100
Message-ID: <9092.850641207@critter.tfs.com>
From: Poul-Henning Kamp <phk@critter.tfs.com>
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In message <199612150121.JAA12763@spinner.DIALix.COM>, Peter Wemm writes:

>However, the shared address space code that I was working on in
>-current (for kernel assisted threading in the smp kernel) means
>that a single vmspace/pmap/etc can be shared among multiple processes
>and this changes the above picture since two cpu's can be using
>the user mode parts of the same page tables at once, one in executing
>in user mode, one in the kernel.

But we could still have a per-cpu flags:
	"I'm not in a shared address-space"

Ie, this would only be set if the CPU was in userland in a non-threaded
process.
	
--
Poul-Henning Kamp           | phk@FreeBSD.ORG       FreeBSD Core-team.
http://www.freebsd.org/~phk | phk@login.dknet.dk    Private mailbox.
whois: [PHK]                | phk@tfs.com           TRW Financial Systems, Inc.
Power and ignorance is a disgusting cocktail.