Re: Pentium bug and path in 2.1.63

Robert Bihlmeyer (robbe@orcus.priv.at)
13 Nov 1997 23:12:41 +0100


Hi,

>>>>> On Thu, 13 Nov 1997 08:08:53 -0600
>>>>> Trever Adams <arabian@onramp.net> said:

Trever> Given that before 2.2.x comes out the patch works perfectly,
Trever> on machines that are not affected (read PPro, PII, AXP etc)
Trever> is the work around always active or is it a compile time
Trever> option? I ask because though people have said it is a small
Trever> performance hit I would prefer to not have any at all on my
Trever> PPro or what not if possible.

Looking at include/asm-i386/bugs.h I conclude, that if the CPU is
not a GenuineIntel Pentium (sans Pro, II, ...) the workaround will
not be enabled. Your IDT will stay as advertised -> no performance hit.

Robbe

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