cvs commit: src/sys/i386/i386 machdep.c
jhb at FreeBSD.org
Mon Nov 3 08:28:55 PST 2003
On 01-Nov-2003 Andy Farkas wrote:
> John Baldwin wrote:
>> On 31-Oct-2003 Bruce Evans wrote:
>> > On Fri, 31 Oct 2003, John Baldwin wrote:
>> >> On 31-Oct-2003 John Baldwin wrote:
>> >> > jhb 2003/10/31 06:24:29 PST
>> >> >
>> >> > FreeBSD src repository
>> >> >
>> >> > Modified files:
>> >> > sys/i386/i386 machdep.c
>> >> > Log:
>> >> > - Finish externing of r_idt in the f00f hack code.
>> >> > - Miscellaneous style fixes in the f00f hack code and some nearby code.
>> >> >
>> >> > Submitted by: bde
>> > Thanks.
>> >> This might actually fix SMP on Pentium's since the AP's will not
>> >> point to the correct IDT without this fix.
>> > Have the been any reports of it being broken? We configure the f00f hack
>> > code on all PentiumIs (aka P5s) including ones without the f00f bug, so
>> > the r_idt bug probably breaks all SMP systems with such CPUs.
>> Actually, since this still used the global r_idt in the SMP case, I'm
>> not sure it was really broken. However, to the best of my knowledge,
>> SMP currently doesn't owrk on PentiumI systems right now at least in
>> current and possibly in stable as well.
> SMP on Pentium Broken? My current dmesg.boot says:
> FreeBSD 5.1-CURRENT #1: Wed Oct 22 10:44:15 EST 2003
> root at team2.af.speednet.com.au:/usr/obj/usr/src/sys/TEAM2
> Preloaded elf kernel "/boot/kernel/kernel" at 0xc0712000.
> Timecounter "i8254" frequency 1193182 Hz quality 0
> CPU: Pentium/P54C (132.00-MHz 586-class CPU)
> Origin = "GenuineIntel" Id = 0x52c Stepping = 12
> real memory = 100663296 (96 MB)
> avail memory = 92332032 (88 MB)
> APIC_IO: MP table broken: 8259->APIC entry missing!
> Programming 16 pins in IOAPIC #0
> EISA INTCONTROL = 00004400
> IOAPIC #0 intpin 2 -> irq 0
> FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
> cpu0 (BSP): apic id: 0, version: 0x00030010, at 0xfee00000
> cpu1 (AP): apic id: 1, version: 0x00030010, at 0xfee00000
> io0 (APIC): apic id: 2, version: 0x000f0011, at 0xfec00000
> Intel Pentium detected, installing workaround for F00F bug
> team2# uptime
> 12:54PM up 1 day, 3:21, 3 users, load averages: 2.58, 3.22, 4.22
> I am building world right now to see if latest ULE still locks up..
Hah. Terry has long complained that SMP has worked on PentiumI's for
John Baldwin <jhb at FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve!" - http://www.FreeBSD.org/
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