oprofile: re-add force_arch_perfmon option

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This re-adds the force_arch_perfmon option that was in the original
arch perfmon patchkit. Originally this was rejected in favour
of a generalized perfmon=name option, but it turned out implementing
the later in a reliable way is hard (and it would have been easy
to crash the kernel if a user gets it wrong)

But now Atom and Core i7 support being readded a user would
need to update their oprofile userland to beyond 0.9.4 to use oprofile again
on Atom or Core i7.

To avoid this problem readd the force_arch_perfmon option.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Robert Richter <robert.richter@amd.com>

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Andi Kleen 2009-04-27 17:44:11 +02:00 • committed by Robert Richter

parent 54f2c841fa

commit 1dcdb5a9e7

2 changed files with 12 additions and 0 deletions

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6

Documentation/kernel-parameters.txt

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6

arch/x86/oprofile/nmi_int.c

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