[LTP] f00f test failure

[Edjunior B. M. <ema...@li...>]

Hi,

executing f00f testcase in x86 Xeon machines, it failed returning SIGSEGV:

# ./f00f 
f00f        0  INFO  :  Testing for proper f00f instruction handling.
Segmentation fault

Searching for this issue, I found an old thread in ltp-list discussing broken test-cases (http://sourceforge.net/mailarchive/message.php?msg_id=46E5998B.9070903%40redhat.com), where Jeff Burke raise this problem with f00f failing on systems that have the NX bit.

But, according to the flags reported in /proc/cpuinfo, the machines where i'm running this testcase seems not to have this NX bit enabled:

# cat /proc/cpuinfo 
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 15
model           : 2
model name      : Intel(R) Xeon(TM) MP CPU 2.50GHz
stepping        : 5
cpu MHz         : 2495.168
cache size      : 1024 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 1
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 2
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid xtpr
bogomips        : 4995.96
(...)

On /proc/cpuinfo, we also have this line "f00f_bug: no". Would it be useful to select if this testcase should be executed or not? 

These machines are running a kernel compiled with processor family "Pentium-Pro" (CONFIG_M686=y), which, in according to the kernel config help, "disables the init-time guard against the f00f bug found in earlier Pentiums".

Is there any suggestion to solve this issue?

Thanks in advance,
-- 
Edjunior