From owner-freebsd-hackers@FreeBSD.ORG  Fri May 23 22:24:30 2003
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 58D1F37B401
	for <freebsd-hackers@freebsd.org>;
	Fri, 23 May 2003 22:24:30 -0700 (PDT)
Received: from puffin.mail.pas.earthlink.net (puffin.mail.pas.earthlink.net
	[207.217.120.139])
	by mx1.FreeBSD.org (Postfix) with ESMTP id C670B43F3F
	for <freebsd-hackers@freebsd.org>;
	Fri, 23 May 2003 22:24:29 -0700 (PDT)
	(envelope-from tlambert2@mindspring.com)
Received: from user-38ldvet.dialup.mindspring.com ([209.86.253.221]
	helo=mindspring.com)
	by puffin.mail.pas.earthlink.net with asmtp (SSLv3:RC4-MD5:128)
	(Exim 3.33 #1)	id 19JRW1-0003Nl-00; Fri, 23 May 2003 22:24:22 -0700
Message-ID: <3ECF01BE.BF58609A@mindspring.com>
Date: Fri, 23 May 2003 22:23:10 -0700
From: Terry Lambert <tlambert2@mindspring.com>
X-Mailer: Mozilla 4.79 [en] (Win98; U)
X-Accept-Language: en
MIME-Version: 1.0
To: Daniel Eischen <eischen@pcnet1.pcnet.com>
References: <Pine.GSO.4.10.10305231618410.8151-100000@pcnet1.pcnet.com>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-ELNK-Trace: b1a02af9316fbb217a47c185c03b154d40683398e744b8a4edaf3d14038aeb451edb845881ee0fbea7ce0e8f8d31aa3f350badd9bab72f9c350badd9bab72f9c
cc: freebsd-hackers@freebsd.org
cc: Dan Nelson <dnelson@allantgroup.com>
cc: Julian Elischer <julian@elischer.org>
Subject: Re: libkse and SMP (was Re: USB bulk read & pthreads)
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 24 May 2003 05:24:30 -0000

Daniel Eischen wrote:
> On Fri, 23 May 2003, Terry Lambert wrote:
> > This is handy to know; so basically, my expectation from
> > reading the code around PTHREAD_SCOPE_SYSTEM was correct:
> > a single CPU system with PTHREAD_SCOPE_PROCESS (the default)
> > can still get itself blocked in the kernel by a single
> > blocking call (as in the USB bulk read device issue).
> 
> If I am reading you correctly, then no.  Scope process
> threads will block in the kernel, but upcalls will be
> made to the originating KSE and new threads will be
> scheduled.

I'm rereading it, but I don't see that interpretation.

I guess if both you and Julian both called me on it, I must
have misexpressed myself, but I currently don't understand
how.  8-|.

-- Terry