Re: [PATCH v9] x86, apic, kexec, Documentation: Add disable_cpu_apickernel parameter

[HATAYAMA Daisuke]

(2013/12/04 12:08), HATAYAMA Daisuke wrote:
> (2013/12/04 0:25), Vivek Goyal wrote:
> > On Tue, Dec 03, 2013 at 10:32:26AM +0900, HATAYAMA Daisuke wrote:
> >
> > [..]
> > > diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
> > > index 50680a5..dd77bec 100644
> > > --- a/Documentation/kernel-parameters.txt
> > > +++ b/Documentation/kernel-parameters.txt
> > > @@ -774,6 +774,15 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
> > >       disable=    [IPV6]
> > >               See Documentation/networking/ipv6.txt.
> > >
> > > +    disable_cpu_apicid= [X86,APIC,KEXEC,SMP]
> >
> > Hi Hatayama,
> >
> > We are almost there. A minor nit. Why have we specified KEXEC here. This
> > parameter disabled_cpu_apicid does not seem to dependon CONFIG_KEXEC?
> >
> > Jerry, this patch looks good to me. Does it work on your system?
>
> Because primary user for the option is currently kexec/kdump only.
>
> I referred to acpi_rsdp description:
>
>          acpi_rsdp=      [ACPI,EFI,KEXEC]
>                          Pass the RSDP address to the kernel, mostly used
>                          on machines running EFI runtime service to boot the
>                          second kernel for kdump.

Indo-san, who introduced acpi_rsdp and KEXEC tag, told me that historical reason
why KEXEC tag was introduced. disable_cpu_apicid is generic at least in the
current version, so the tag doesn't need to be specified here.

I'll post a new version soon.

--
Thanks.
HATAYAMA, Daisuke

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/