From owner-cvs-src  Mon Mar 10 21:45:35 2003
Delivered-To: cvs-src@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id A1C4637B404; Mon, 10 Mar 2003 21:45:32 -0800 (PST)
Received: from mail.viasoft.com.cn (ip-167-164-97-218.anlai.com [218.97.164.167])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id AEE1943FCB; Mon, 10 Mar 2003 21:45:12 -0800 (PST)
	(envelope-from davidxu@viatech.com.cn)
Received: from davidw2k (davidlnx.viasoft.com.cn [192.168.1.240])
	by mail.viasoft.com.cn (8.9.3/8.9.3) with SMTP id OAA05605;
	Tue, 11 Mar 2003 14:10:48 +0800
Message-ID: <007501c2e791$60958100$f001a8c0@davidw2k>
From: "David Xu" <davidxu@viatech.com.cn>
To: "Alfred Perlstein" <bright@mu.org>
Cc: <src-committers@FreeBSD.org>, <cvs-src@FreeBSD.org>,
	<cvs-all@FreeBSD.org>
References: <200303110259.h2B2xor5078625@repoman.freebsd.org> <20030311051206.GZ4145@elvis.mu.org>
Subject: Re: cvs commit: src/sys/kern kern_thread.c subr_trap.c
Date: Tue, 11 Mar 2003 13:45:09 +0800
MIME-Version: 1.0
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 5.50.4807.1700
X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4910.0300
Sender: owner-cvs-src@FreeBSD.ORG
Precedence: bulk
List-ID: <cvs-src.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20cvs-src>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20cvs-src>
X-Loop: FreeBSD.ORG


----- Original Message -----=20
From: "Alfred Perlstein" <bright@mu.org>
To: "David Xu" <davidxu@FreeBSD.org>
Cc: <src-committers@FreeBSD.org>; <cvs-src@FreeBSD.org>; =
<cvs-all@FreeBSD.org>
Sent: Tuesday, March 11, 2003 1:12 PM
Subject: Re: cvs commit: src/sys/kern kern_thread.c subr_trap.c


> * David Xu <davidxu@FreeBSD.org> [030310 18:59] wrote:
> > davidxu     2003/03/10 18:59:50 PST
> >=20
> >   FreeBSD src repository
> >=20
> >   Modified files:
> >     sys/kern             kern_thread.c subr_trap.c=20
> >   Log:
> >   Fix signal delivering bug for threaded process.
>=20
> Details, while not manditory are encouraged.  See a typical
> commit by Dr. Mckusick.
>=20
OOPS, for this commit:=20
The original code will lose an userland context if current thread is
direct returning from syscall which was never blocked or UTS kernel
is doing syscall, at that time an upcall shouldn't be made.=20
TDF_UPCALLING was abused in that code.

> --=20
> -Alfred Perlstein [alfred@freebsd.org]
> 'Instead of asking why a piece of software is using "1970s =
technology,"
>  start asking why software is ignoring 30 years of accumulated =
wisdom.'


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe cvs-src" in the body of the message