Re: BUG: sleeping function called from invalid context at arch/powerpc/kernel/rtas.c:463

[Yao Fei Zhu <walkinair@cn.ibm.com>]

Nathan Lynch wrote:

> Hi,
>
> Yao Fei Zhu wrote:
>  
>
> > Hi, all
> >
> > Online and offline cpus in 2.6.18-rc4/PPC64 will trigger Call Trace
> > like this,
> >
> > [root@blade11 ~]# echo 0 > /sys/devices/system/cpu/cpu0/online
> > [root@blade11 ~]# dmesg -c
> > BUG: sleeping function called from invalid context at 
> > arch/powerpc/kernel/rtas.c:463
> > in_atomic():0, irqs_disabled():1
> > Call Trace:
> > [C0000000725EB9C0] [C00000000000FB70] .show_stack+0x68/0x1b0 (unreliable)
> > [C0000000725EBA60] [C000000000053EB4] .__might_sleep+0xd8/0xf4
> > [C0000000725EBAE0] [C00000000001D5D8] .rtas_busy_delay+0x20/0x5c
> > [C0000000725EBB70] [C00000000001DC00] .rtas_set_indicator+0x6c/0xcc
> > [C0000000725EBC10] [C000000000049130] .xics_migrate_irqs_away+0x6c/0x20c
> > [C0000000725EBCD0] [C000000000048EEC] .pSeries_cpu_disable+0x98/0xb4
> > [C0000000725EBD50] [C000000000029A24] .__cpu_disable+0x44/0x58
> > [C0000000725EBDC0] [C000000000082030] .take_cpu_down+0x10/0x38
> > [C0000000725EBE40] [C000000000090000] .do_stop+0x16c/0x20c
> > [C0000000725EBEE0] [C000000000078EBC] .kthread+0x128/0x178
> > [C0000000725EBF90] [C0000000000271DC] .kernel_thread+0x4c/0x68
> >    
>
>
> The fix for this was committed to Linus's tree after 2.6.18-rc4; look for
>
> [POWERPC] Fix might-sleep warning on removing cpus
>
> in the change history.
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>  
Yes, tested the fix, thanks.

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