F00F-bug workaround working?

F00F-bug workaround working?

[Tony Glader]

I have had problems with 2.4.17 running in a Classic Pentium (lot of 
oopses). I'm sure that there's no problem with hardware. Is F00F'bug 
workaround work still?

Re: F00F-bug workaround working?

[Joseph Pingenot]

>From Tony Glader on Saturday, 12 January, 2002:
>I have had problems with 2.4.17 running in a Classic Pentium (lot of 
>oopses). I'm sure that there's no problem with hardware. Is F00F'bug 
>workaround work still?

I'm running a P100 on 2.4.17 without any errors.  I see
"Intel Pentium with F0 0F bug - workaround enabled."
in the dmesg logs.

How about posting your oopses (after running them through ksymoops)

-- 
Joseph======================================================jap3003@ksu.edu
"If you really want to toggle [Internet Explorer] into secure mode, you
  just need to click the little 'X" in the top right corner of the window."
     --User dsb3 on www.slashdot.org.       [Use Mozilla! www.mozilla.org.]

Re: F00F-bug workaround working?

[H. Peter Anvin]

Followup to:  <20020112160308.B4926@ksu.edu>
By author:    Joseph Pingenot <jap3003@ksu.edu>
In newsgroup: linux.dev.kernel
>
> From Tony Glader on Saturday, 12 January, 2002:
> >I have had problems with 2.4.17 running in a Classic Pentium (lot of 
> >oopses). I'm sure that there's no problem with hardware. Is F00F'bug 
> >workaround work still?
> 
> I'm running a P100 on 2.4.17 without any errors.  I see
> "Intel Pentium with F0 0F bug - workaround enabled."
> in the dmesg logs.
> 
> How about posting your oopses (after running them through ksymoops)
> 

F00F wouldn't oops the machine anyway, it would lock it up solid.

	-hpa
-- 
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt	<amsp@zytor.com>

Re: F00F-bug workaround working?

[Jose Luis Domingo Lopez]

On Saturday, 12 January 2002, at 23:49:06 +0200,
Tony Glader wrote:

> I have had problems with 2.4.17 running in a Classic Pentium (lot of 
> oopses). I'm sure that there's no problem with hardware. Is F00F'bug 
> workaround work still?
> 
No problems here with any 2.4.x kernel, both with old and new
workarounds for the mentioned bug.

processor	: 0
vendor_id	: GenuineIntel
cpu family	: 5
model		: 2
model name	: Pentium 75 - 200
stepping	: 12
cpu MHz		: 165.792
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: yes
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 1
wp		: yes
flags		: fpu vme de pse tsc msr mce cx8
bogomips	: 330.95

Jan 12 12:30:21 dardhal kernel: Intel Pentium with F0 0F bug -
workaround enabled

-- 
José Luis Domingo López
Linux Registered User #189436     Debian Linux Woody (P166 64 MB RAM)
 
jdomingo AT internautas DOT   org  => Spam at your own risk

Re: F00F-bug workaround working?

[James Stevenson]

----- Original Message -----
From: "Tony Glader" <Tony.Glader@blueberrysolutions.com>
To: <linux-kernel@vger.kernel.org>
Sent: Saturday, January 12, 2002 9:49 PM
Subject: F00F-bug workaround working?


>
> I have had problems with 2.4.17 running in a Classic Pentium (lot of
> oopses). I'm sure that there's no problem with hardware. Is F00F'bug
> workaround work still?

Hi

it seems to work fine here 2.4.14-2.4.17 anyway.

Dmesg:

Intel Pentium with F0 0F bug - workaround enabled.

/proc/cpuinfo:

f00f_bug : yes

the foof bug would cause the system to hang. not to panic.

out of intrest does anyone know what the hlt bug on the cyrix does ?

thanks
    James

Re: F00F-bug workaround working?

[Stevie O]

At 11:11 PM 1/13/2002 +0000, James Stevenson wrote:


>the foof bug would cause the system to hang. not to panic.
>

If I'm not mistaken (and I probably am), the F00F bug causes the proc to 
screw  up the handling of an invalid instruction.  I.E. no legitimate 
program would possibly cause this, only hand-written bytecode (or, 
theoretically, a stack overflow overwriting a return address to point to 
data) can cause this.

So unless someone's trying to mess with you, I doubt F00F is affecting you.

http://x86.ddj.com/errata/dec97/f00fbug.htm




--
Stevie-O

Real programmers use COPY CON PROGRAM.EXE

Re: F00F-bug workaround working?

[Zwane Mwaikambo]

The F00F bug locks up your box, the oopses have nothing to do with it. If
the box is still alive after the oops try running ksymoops on them. If you
notice that its a different oops each time, its probably your hardware
going round the bend.

Cheers,
	Zwane Mwaikambo