From owner-cvs-all Mon Oct 29 7: 8:20 2001 Delivered-To: cvs-all@freebsd.org Received: from anchor-post-34.mail.demon.net (anchor-post-34.mail.demon.net [194.217.242.92]) by hub.freebsd.org (Postfix) with ESMTP id 340FD37B405; Mon, 29 Oct 2001 07:08:16 -0800 (PST) Received: from [62.49.251.130] (helo=herring.nlsystems.com) by anchor-post-34.mail.demon.net with esmtp (Exim 2.12 #1) id 15yE1P-000Pye-0Y; Mon, 29 Oct 2001 15:08:15 +0000 Received: from herring (herring [10.0.0.2]) by herring.nlsystems.com (8.11.2/8.11.2) with ESMTP id f9TF6x743101; Mon, 29 Oct 2001 15:06:59 GMT (envelope-from dfr@nlsystems.com) Date: Mon, 29 Oct 2001 15:06:59 +0000 (GMT) From: Doug Rabson To: John Baldwin Cc: , Subject: Re: cvs commit: src/sys/alpha/alpha trap.c src/sys/i386/i386 trap.c src/sys/ia64/ia64 trap.c src/sys/kern init_main.c kern_exit.c kern_fork.c subr_trap.c src/sys/sparc64/sparc64 trap.c In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-cvs-all@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Mon, 29 Oct 2001, Doug Rabson wrote: > On Fri, 26 Oct 2001, John Baldwin wrote: > > > jhb 2001/10/26 01:12:54 PDT > > > > Modified files: > > sys/alpha/alpha trap.c > > sys/i386/i386 trap.c > > sys/ia64/ia64 trap.c > > sys/kern init_main.c kern_exit.c kern_fork.c > > subr_trap.c > > sys/sparc64/sparc64 trap.c > > sys/sys proc.h > > Log: > > Add a per-thread ucred reference for syscalls and synchronous traps from > > userland. The per thread ucred reference is immutable and thus needs no > > locks to be read. However, until all the proc locking associated with > > writes to p_ucred are completed, it is still not safe to use the per-thread > > reference. > > > > Tested on: x86 (SMP), alpha, sparc64 > > This gets horribly confused when I set a DDB breakpoint at the start of > syscall() - it goes into a tight look calling panic because the value of > td_ucred is NULL. s/look/loop/ -- Doug Rabson Mail: dfr@nlsystems.com Phone: +44 20 8348 6160 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message