From owner-freebsd-hackers Wed Sep 19 19: 3:21 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from peter3.wemm.org (c1315225-a.plstn1.sfba.home.com [24.14.150.180]) by hub.freebsd.org (Postfix) with ESMTP id 3981937B40C for ; Wed, 19 Sep 2001 19:01:37 -0700 (PDT) Received: from overcee.netplex.com.au (overcee.wemm.org [10.0.0.3]) by peter3.wemm.org (8.11.0/8.11.0) with ESMTP id f8K21aM00883; Wed, 19 Sep 2001 19:01:37 -0700 (PDT) (envelope-from peter@wemm.org) Received: from wemm.org (localhost [127.0.0.1]) by overcee.netplex.com.au (Postfix) with ESMTP id E7F61380A; Wed, 19 Sep 2001 19:01:36 -0700 (PDT) (envelope-from peter@wemm.org) X-Mailer: exmh version 2.3.1 01/18/2001 with nmh-1.0.4 To: John Baldwin Cc: hackers@FreeBSD.org Subject: Re: JKH Project: x86: pcb_ext In-Reply-To: Date: Wed, 19 Sep 2001 19:01:36 -0700 From: Peter Wemm Message-Id: <20010920020136.E7F61380A@overcee.netplex.com.au> Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG John Baldwin wrote: > > On 19-Sep-01 Peter Wemm wrote: > > The more I think about it, the right place may be the kse, since that > > outlives > > the threads and is per-cpu unlike the process. > > > > Or, we just say "no pcb extensions for kse processes". > > Each thread would need its own TSS, and to preserve existing semantics, we > would have to change the TSS of all threads for each TSS related syscall. In > light of that, I vote in favor of "no TSS's for kse processes" since TSS's ar e > used for very few things anyways. LDT's are another matter and can be moved > w/o a problem. The main two things we seem to use the per-process TSS stuff for are: Fine grained IO port permission bitmap VM86 mode I think we can well do without the complexity of mixing KSE with those two. We still would need to sync LDT reloads.. Cheers, -Peter -- Peter Wemm - peter@FreeBSD.org; peter@yahoo-inc.com; peter@netplex.com.au "All of this is for nothing if we don't go to the stars" - JMS/B5 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message