On Tue, 15 May 2018, Kirill A. Shutemov wrote:
> On Sun, May 13, 2018 at 09:55:00PM +, Thomas Gleixner wrote:
> > On Fri, 11 May 2018, Kirill A. Shutemov wrote:
> > > --- a/arch/x86/kernel/cpu/common.c
> > > +++ b/arch/x86/kernel/cpu/common.c
> > > @@ -1008,6 +1008,12 @@ static void __init ear
On Sun, May 13, 2018 at 09:55:00PM +, Thomas Gleixner wrote:
> On Fri, 11 May 2018, Kirill A. Shutemov wrote:
> > --- a/arch/x86/kernel/cpu/common.c
> > +++ b/arch/x86/kernel/cpu/common.c
> > @@ -1008,6 +1008,12 @@ static void __init early_identify_cpu(struct
> > cpuinfo_x86 *c)
> > */
>
On Fri, 11 May 2018, Kirill A. Shutemov wrote:
> --- a/arch/x86/kernel/cpu/common.c
> +++ b/arch/x86/kernel/cpu/common.c
> @@ -1008,6 +1008,12 @@ static void __init early_identify_cpu(struct
> cpuinfo_x86 *c)
>*/
> setup_clear_cpu_cap(X86_FEATURE_PCID);
> #endif
> +
> +#ifdef CONFIG
The kernel parameter allows to force kernel to use 4-level paging even
if hardware and kernel support 5-level paging.
The option may be useful to workaround regressions related to 5-level
paging.
Signed-off-by: Kirill A. Shutemov
---
Documentation/admin-guide/kernel-parameters.txt | 3 +++
arc
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