On Sun, Feb 26, 2017 at 12:55:01PM +0100, Daniel Vidal wrote:
> Hi
>
> The radeon driver hangs from 3.16 kernel.
>
> RT patch for radeon driver only disable ( preempt_disable_rt() ) and
> reenable ( preempt_enable_rt() ) the whole RT in file radeon_display.c
>
> Obviously this is not enough.
>
> I think the radeon developers should make some modification in the
> driver but I do not know which is the right place to indicate it
>
> Here my backtrace.
Two more debugging ideas:
1. Boot with lockdep enabled, see if that gives you a meaningful
splat.
2. Use sysrq-trigger 'd' to dump held locks to console when stuck in
this state, in order to track down the codepath causing problems.
Julia
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