Re: console_cpu_notify can cause scheduling BUG during CPU hotplug

[Santosh Shilimkar]

On 4/26/2011 5:48 AM, Kevin Cernekee wrote:
> On Mon, Apr 25, 2011 at 4:33 PM, Michael Bohan<mbohan@xxxxxxxxxxxxxx>  wrote:
> > I was curious if this scenario was accounted for in the design of the
> > console CPU notifier. One workaround for this problem is to remove CPU_DEAD
> > from the possible actions in console_cpu_notify(). In fact, v1-v4 of the
> > patch above did not have CPU_DEAD, CPU_DYING or CPU_DOWN_FAILED in the list
> > of actions. I wasn't able to track down why the other cases were added in
> > the final patch.
>
> Here is the background information on the CPU_{DEAD,DYING,DOWN_FAILED} cases:
>
> http://lkml.org/lkml/2010/6/29/65
That's right.
May be the change log for commit '034260d67' would have been
bit more descriptive about the CPU hot-plug events.

Regards
Santosh


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