From owner-freebsd-stable@FreeBSD.ORG Mon May 26 02:23:35 2008 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id AD4711065676; Mon, 26 May 2008 02:23:35 +0000 (UTC) (envelope-from markir@paradise.net.nz) Received: from smtp3.clear.net.nz (smtp3.clear.net.nz [203.97.33.64]) by mx1.freebsd.org (Postfix) with ESMTP id 648E98FC13; Mon, 26 May 2008 02:23:35 +0000 (UTC) (envelope-from markir@paradise.net.nz) Received: from zmori.markir.net (121-73-165-252.dsl.telstraclear.net [121.73.165.252]) by smtp3.clear.net.nz (CLEAR Net Mail) with ESMTP id <0K1G00HROEMNO210@smtp3.clear.net.nz>; Mon, 26 May 2008 14:23:12 +1200 (NZST) Date: Mon, 26 May 2008 14:23:11 +1200 From: Mark Kirkwood In-reply-to: <20080525171632.GA1305@peter.osted.lan> To: Peter Holm Message-id: <483A1F0F.1060502@paradise.net.nz> MIME-version: 1.0 Content-type: text/plain; charset=ISO-8859-1; format=flowed Content-transfer-encoding: 7bit References: <720051dc0805220159n23eb6205yfcf9450be7af5c77@mail.gmail.com> <200805230829.09524.jhb@freebsd.org> <20080523132645.GO29770@deviant.kiev.zoral.com.ua> <200805231811.01936.jhb@freebsd.org> <48390FA9.5080503@paradise.net.nz> <4839243D.7000700@paradise.net.nz> <20080525171632.GA1305@peter.osted.lan> User-Agent: Thunderbird 2.0.0.9 (X11/20080419) Cc: freebsd-stable , John Baldwin Subject: Re: BTX loader hangs after version info X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 May 2008 02:23:35 -0000 Peter Holm wrote: > On Sun, May 25, 2008 at 08:33:01PM +1200, Mark Kirkwood wrote: > >> I wrote: >> >>> John Baldwin wrote: >>> >>>> Try this patch. I'm not 100% certain this will fix it as I can't >>>> reproduce >>>> the issue, but I think it might help. Specifically, when the boot >>>> code makes >>>> a v86 call, the loader/boot2/whatever swaps in/out a new set of >>>> registers via >>>> the v86 structure including the eflags register. However, none of >>>> the boot >>>> programs actually initialized the v86 structure. Thus, the BIOS >>>> routines >>>> would start off running with whatever garbage was in v86.efl when >>>> each boot >>>> program started. This meant that we could end up invoking BIOS >>>> routines with >>>> interrupts disabled, and I think this might explain a hard hang (if a >>>> BIOS >>>> routine was waiting for an interrupt the interrupt would never >>>> fire). The >>>> patch fixes all the boot programs to initialize v86 to a better known >>>> state. At the least it sets v86.efl to a sane value (0x202) rather >>>> than random. (The >>>> random might have always been 0x0 BTW, not sure on that one.) >>>> >>>> >>>> >>> Thanks John, >>> >>> Unfortunately this patch does *not* cure the issue for my old >>> Supermicro P3TDDE, it still hangs just before presenting the menu. I >>> had to boot off the livefs and copy /boot/loader.old -> /boot/loader >>> to get back to being bootable again - but at least the old fella is on >>> a more up-to-date 7-STABLE now :-) >>> >> Given that the patch *did* cure Peters Tyan S2720, I'll double check I >> didn't fat finger applying the patch (mind you the Tyan has AMI BOIS - >> same as my Supermicro P3TDERs that *do* work ok with current 7-STABLE, >> whereas the P3TDDE has Award BIOS). >> >> Anyway, I'll double check and report back... >> >> Cheers >> >> Mark >> > > I did 18 boots with and with out John's patch. With the patch I got 6 > actual boots and 12 hangs in the loaders progress bar. > > Without the patch I got 10 boots and 8 hangs. > > But, my Tyan M/B is old and with known ACPI issues so I'm not sure if > this is of much value. > > Mark, it would be nice if you also observe if a sequence of reboots > eventually boots your system. My longest bad streek was 8 reboots. > > Yeah, I see the same thing - with John's patch applied, out of 9 reboots I got 7 hangs and 2 actual boots. (didn't try without the patch). Mark