Re: [PATCH] adjust root-domain->online span in response to hotplugevent | KernelTrap

Re: [PATCH] adjust root-domain->online span in response to hotplugevent

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From: Gregory Haskins <gregory.haskins.ml@...>

To: Dmitry Adamushko <dmitry.adamushko@...>

Cc: Gregory Haskins <ghaskins@...>, Ingo Molnar <mingo@...>, <ego@...>, <suresh.b.siddha@...>, <yi.y.yang@...>, <tglx@...>, <akpm@...>, <rjw@...>, <oleg@...>, <linux-kernel@...>

Subject: Re: [PATCH] adjust root-domain->online span in response to hotplugevent

Date: Monday, March 10, 2008 - 10:12 am

Dmitry Adamushko wrote:
quoted text> On 08/03/2008, Gregory Haskins <ghaskins@novell.com> wrote:
> 
> I guess, it's in arch-specific code. e.g. for x86-64,
> 
> down:
> 
> kernel/cpu.c :: _cpu_down -> take_cpu_down() -> __cpu_disable() [
> arch/x86/kernel/smpboot_64.c ] -> cpu_clear(cpu, cpu_online_map)
> 
> up:
> 
> kernel/cpu.c :: _cpu_up() -> __cpu_up [ arch/x86/kernel/smpboot_64.c ]
> -> do_boot_cpu() -> start_secondary() [ runs on a to-be-online cpu ]
> -> cpu_set(smp_processor_id(), cpu_online_map)

Thanks Dmitry!  Your tip helped me to figure out what the real solution 
should be.

Regards,
-Greg
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Messages in current thread:

[BUG 2.6.25-rc3] scheduler/hotplug: some processes are dealo..., Yi Yang, (Sun Mar 2, 2:42 pm)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Gautham R Shenoy, (Mon Mar 3, 11:31 am)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Yi Yang, (Mon Mar 3, 10:45 am)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Gautham R Shenoy, (Tue Mar 4, 1:26 am)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Oleg Nesterov, (Tue Mar 4, 11:01 am)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Gautham R Shenoy, (Thu Mar 6, 9:44 am)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Oleg Nesterov, (Thu Mar 6, 10:54 pm)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Gautham R Shenoy, (Fri Mar 7, 5:10 am)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Gautham R Shenoy, (Fri Mar 7, 6:51 am)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Dmitry Adamushko, (Fri Mar 7, 9:02 am)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Andrew Morton, (Fri Mar 7, 4:18 pm)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Rafael J. Wysocki, (Fri Mar 7, 5:36 pm)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Suresh Siddha, (Fri Mar 7, 7:01 pm)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Andrew Morton, (Fri Mar 7, 7:29 pm)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Rafael J. Wysocki, (Fri Mar 7, 7:43 pm)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Suresh Siddha, (Fri Mar 7, 9:50 pm)

[PATCH] adjust root-domain->online span in response to ho..., Gregory Haskins, (Sat Mar 8, 1:10 am)

Re: [PATCH] adjust root-domain->online span in response t..., Gautham R Shenoy, (Mon Mar 10, 4:14 am)

[PATCH] keep rd->online and cpu_online_map in sync, Gregory Haskins, (Mon Mar 10, 9:39 am)

Re: [PATCH] keep rd->online and cpu_online_map in sync, Suresh Siddha, (Mon Mar 10, 2:12 pm)

Re: [PATCH] keep rd->online and cpu_online_map in sync, Rafael J. Wysocki, (Mon Mar 10, 6:03 pm)

Re: [PATCH] keep rd->online and cpu_online_map in sync, Gregory Haskins, (Mon Mar 10, 6:00 pm)

Re: [PATCH] keep rd->online and cpu_online_map in sync, Suresh Siddha, (Mon Mar 10, 6:10 pm)

[PATCH v2] keep rd->online and cpu_online_map in sync, Gregory Haskins, (Mon Mar 10, 5:59 pm)

Re: [PATCH v2] keep rd->online and cpu_online_map in sync, Andrew Morton, (Mon Mar 10, 7:36 pm)

Re: [PATCH v2] keep rd->online and cpu_online_map in sync, Suresh Siddha, (Mon Mar 10, 9:34 pm)

Re: [PATCH v2] keep rd->online and cpu_online_map in sync, Gautham R Shenoy, (Tue Mar 11, 12:39 am)

Re: [PATCH] keep rd->online and cpu_online_map in sync, Gautham R Shenoy, (Mon Mar 10, 10:21 am)

[PATCH] cpu-hotplug: Register update_sched_domains() notifie..., Gautham R Shenoy, (Mon Mar 10, 9:13 am)

Re: [PATCH] cpu-hotplug: Register update_sched_domains() not..., Andrew Morton, (Mon Mar 10, 6:25 pm)

Re: [PATCH] adjust root-domain->online span in response t..., Suresh Siddha, (Sat Mar 8, 10:35 pm)

Re: [PATCH] adjust root-domain->online span in response t..., Gregory Haskins, (Mon Mar 10, 8:41 am)

Re: [PATCH] adjust root-domain->online span in response t..., Ingo Molnar, (Sat Mar 8, 4:41 am)

Re: [PATCH] adjust root-domain->online span in response t..., Gregory Haskins, (Sat Mar 8, 1:50 pm)

Re: [PATCH] adjust root-domain->online span in response t..., Dmitry Adamushko, (Sat Mar 8, 8:31 pm)

Re: [PATCH] adjust root-domain->online span in response t..., Gregory Haskins, (Mon Mar 10, 10:12 am)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Andrew Morton, (Fri Mar 7, 10:09 pm)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Gautham R Shenoy, (Fri Mar 7, 9:55 am)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Gautham R Shenoy, (Fri Mar 7, 11:50 am)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes arede..., Suresh Siddha, (Fri Mar 7, 3:14 pm)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Yi Yang, (Thu Mar 6, 7:20 pm)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Gautham R Shenoy, (Wed Mar 5, 6:05 am)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Oleg Nesterov, (Wed Mar 5, 9:53 am)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Gautham R Shenoy, (Thu Mar 6, 7:15 am)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Gautham R Shenoy, (Thu Mar 6, 8:22 am)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Yi Yang, (Tue Mar 4, 10:37 am)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Yi Yang, (Thu Mar 6, 4:05 pm)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Gautham R Shenoy, (Tue Mar 4, 5:09 am)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Yi Yang, (Mon Mar 3, 5:56 pm)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Dmitry Adamushko, (Mon Mar 3, 7:54 am)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Ingo Molnar, (Mon Mar 3, 7:56 am)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Dmitry Adamushko, (Mon Mar 3, 8:02 am)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Yi Yang, (Mon Mar 3, 10:53 am)

Re: [BUG 2.6.25-rc3] scheduler/hotplug: some processes are d..., Yi Yang, (Mon Mar 3, 1:37 pm)

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