diff options
| author | Andi Kleen <andi@firstfloor.org> | 2009-04-27 17:44:11 +0200 |
|---|---|---|
| committer | Robert Richter <robert.richter@amd.com> | 2009-05-08 11:06:33 +0200 |
| commit | 1dcdb5a9e7c235e6e80f1f4d5b8247b3e5347e48 (patch) | |
| tree | 197b80f4941f535fd3b251755b74b557cb8d9ca8 /arch/x86/oprofile | |
| parent | oprofile: fix cpu buffer size (diff) | |
| download | linux-1dcdb5a9e7c235e6e80f1f4d5b8247b3e5347e48.tar.xz linux-1dcdb5a9e7c235e6e80f1f4d5b8247b3e5347e48.zip | |
oprofile: re-add force_arch_perfmon option
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>
Diffstat (limited to 'arch/x86/oprofile')
| -rw-r--r-- | arch/x86/oprofile/nmi_int.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c index 202864ad49a7..e5171c99e157 100644 --- a/arch/x86/oprofile/nmi_int.c +++ b/arch/x86/oprofile/nmi_int.c @@ -389,10 +389,16 @@ static int __init p4_init(char **cpu_type) return 0; } +int force_arch_perfmon; +module_param(force_arch_perfmon, int, 0); + static int __init ppro_init(char **cpu_type) { __u8 cpu_model = boot_cpu_data.x86_model; + if (force_arch_perfmon && cpu_has_arch_perfmon) + return 0; + switch (cpu_model) { case 0 ... 2: *cpu_type = "i386/ppro"; |