[Cbe-oss-dev] [PATCH 2/2] ps3fb: fix deadlock on kexec()

[Geert Uytterhoeven]

On Thu, 10 Jan 2008, Geert Uytterhoeven wrote:
> On Thu, 10 Jan 2008, Jeremy Kerr wrote:
>   - If you have only one active frame buffer device, fbcon_fb_unbind() won't
>     call set_con2fb_map(), as there's no other frame buffer device to switch
>     to.
>   - ps3fb_release() calls ps3fb_sync() only when /dev/fb0 is open.
> 
> On normal shutdown, it doesn't happen because all applications are killed
> first.

Which brings us to another question: shouldn't all processes be killed for
doing a safe kexec, just like is done for shutdown/halt/poweroff (unless you
use `-f')? Of course this makes things more complicated, as the actual kexec
can no longer be done by the application, but must be handled by init instead.

(also cfr. the thread `Re: [PATCH 1/8] pseries: phyp dump: Docmentation' on
 linuxppc-dev, where Linas mentioned problems with shutting down PCI on kexec)

Of course this is irrespective of this bug (which must be fixed).

With kind regards,

Geert Uytterhoeven
Software Architect

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