Re: Status on CPU hotplug issues

[Pavel Machek <pavel@ucw.cz>]

Hi!

> 1.  Oops offlining cpu twice on AMD64 (but not on EM64t)
>     with the 2.6.18-git22 kernel
> 
>     Reported to hotplug lists 10/05:
>       http://lists.osdl.org/pipermail/hotplug_sig/2006-October/000680.html
> 
>     To recreate: offline, online, and then offline a CPU, then oopses
>       http://crucible.osdl.org/runs/2397/sysinfo/amd01.console
>       http://crucible.osdl.org/runs/2397/sysinfo/amd01.2/proc/config
> 
>     Here's a snippet of the oops:
> 
> # echo 0 > /sys/devices/system/cpu/cpu1/online
> 
>  Unable to handle kernel NULL pointer dereference at 0000000000000000 RIP:
>  [<ffffffff80255287>] __drain_pages+0x29/0x5f
> PGD 7e56d067 PUD 7ee80067 PMD 0
> Oops: 0000 [1] PREEMPT SMP
> CPU 0
> Modules linked in:
> Pid: 7203, comm: bash Tainted: G   M  2.6.18-git22 #1
                                 ~~~~~
kernel is unhappy here. Forced module unload?

-- 
Thanks for all the (sleeping) penguins.
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