Date: Fri, 5 Nov 2010 08:53:49 -0600 From: Dan Allen <danallen46@airwired.net> To: Andriy Gapon <avg@freebsd.org> Cc: Sergey Kandaurov <pluknet@gmail.com>, FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org> Subject: Re: Fatal trap 18 Message-ID: <5224E1F5-4567-45A8-A12C-868F7B45BC21@airwired.net> In-Reply-To: <4CD11FE9.8050105@freebsd.org> References: <68E248E0-8619-4859-BFFE-1B5F5ABBC51F@airwired.net> <AANLkTik0=x6h3YK0F_yrRJ_MGHp9pf8dVubbEwpmAa1y@mail.gmail.com> <4CD11FE9.8050105@freebsd.org>
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On 3 Nov 2010, at 2:40 AM, Andriy Gapon wrote: > This problem seems to happen only on SMP systems that for some reason run as UP. > E.g. because ACPI and/or APIC are disabled. > Or some other BIOS configuration. > But I am not sure what exactly is the case here. Okay, I have been researching my UP/SMP problem. In the past, before recent "Intel topology" changes, on my Toshiba Satellite U205 machine if I used a kernel with ACPI support, only 1 logical CPU showed up in FreeBSD 8.1-STABLE. When I booted into Windows XP on the same machine, with the same BIOS settings, I would see 2 logical CPUs. If I built a FreeBSD kernel WITHOUT ACPI support and left the BIOS settings as they were above, I then would see 2 logical CPUs. Now with these recent FreeBSD changes I cannot get the machine to EVER recognize a 2nd logical processor, but if I boot into Windows XP I still see two CPUs, so we still have a bug in this new Intel topology code. This laptop has an Intel Core Duo T2400 @ 1.83 GHz chip. (The BIOS is set to provide multiple logical CPUs in all cases and Andriy, I am using your patched kernel.) Is there anything else I can do to help you understand this system config? What next? Dan
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