On Thu, 8 Jun 2017, Zhenzhong Duan wrote:
> unsynchronized_tsc() checks value of tsc_clocksource_reliable which is set by
> check_system_tsc_reliable(). It's better to move check_system_tsc_reliable()
> at
> front, or else this check makes no sense.
>
> Though X86_FEATURE_CONSTANT_TSC is usually set for TSC reliable system, just
> in
> case.
>
> Signed-off-by: Zhenzhong Duan <[email protected]>
> ---
> arch/x86/kernel/tsc.c | 4 ++--
> 1 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
> index 714dfba..a316bdd 100644
> --- a/arch/x86/kernel/tsc.c
> +++ b/arch/x86/kernel/tsc.c
> @@ -1412,11 +1412,11 @@ void __init tsc_init(void)
> use_tsc_delay();
> + check_system_tsc_reliable();
> +
> if (unsynchronized_tsc())
> mark_tsc_unstable("TSCs unsynchronized");
> - check_system_tsc_reliable();
> -
What kind of patch is that? Definitely nothing which can be applied.
Thanks,
tglx
