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> Does it compile as is with CONFIG_HOTPLUG_CPU=n ?
Not exactly. To set CONFIG_HOTPLUG_CPU=n I had to do ( not sure steps are really required ) :-
1) kernel/power/Kconfig. Step 1 config PM_SLEEP_SMP bool depends on SMP depends on ARCH_SUSPEND_POSSIBLE || ARCH_HIBERNATION_POSSIBLE depends on PM_SLEEP # select HOTPLUG_CPU default y
2) arch/x86/Kconfig Step 2 config HOTPLUG_CPU # bool "Support for hot-pluggable CPUs" def_bool
n # depends on SMP && HOTPLUG ---help--- Say Y here to allow turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu. ( Note: power management support will enable this option automatically on SMP systems. ) Say N if you want to disable CPU hotplug.
But , the result should be the same. HOTPLUG_CPU feature should be broken. It's second kernel been built. I have not tested it yet. First one with HOTPLUG_CPU=y and ARCH_CPU_PROBE_RELEASE=n seems to work OK.
--- On Sun,
10/10/10, listmail <listmail@xxxxxxxxxxxx> wrote:
From: listmail <listmail@xxxxxxxxxxxx> Subject: Re: [Xen-users] Attempt to apply xen-patches-2.6.34-4.tar.bz2 to 22.214.171.124 vanilla To: "Boris Derzhavets" <bderzhavets@xxxxxxxxx> Cc: xen-users@xxxxxxxxxxxxxxxxxxx Date: Sunday, October 10, 2010, 11:44 AM
On 10/10/2010 10:51 AM, Mike Viau wrote: >> On Sun, 10 Oct 2010 07:35:55 -0700<bderzhavets@xxxxxxxxx> wrote: >> >> Another way to disable this calls via include/linux/cpu.h , having >> CONFIG_HOTPLUG_CPU=y is to change arch/x86/Kconfig :- >> >> --- arch/x86/Kconfig.orig 2010-10-10 18:29:24.490068330 +0400 >> +++
arch/x86/Kconfig 2010-10-10 17:50:22.383715068 +0400 >> @@ -254,8 +254,8 @@ >> def_bool X86_32 >> >> config ARCH_CPU_PROBE_RELEASE >> - def_bool y >> - depends on HOTPLUG_CPU >> + def_bool n >> +# depends on HOTPLUG_CPU >> >> Boris > What are the reciprocation of turning off the ability to HOTPLUG_CPU? Is this feature ever used by XEN? > > Thanks. > > -M > > _______________________________________________ > Xen-users mailing list > Xen-users@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-users