Re: Dealing with the NMI mess

[Steven Rostedt]

On Fri, 24 Jul 2015 22:51:19 +0200
Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:

 
> > Do we really take locks in the #DB handler?
> 
> do_debug()
>   send_sigtrap()
>     force_sig_info()
>       spin_lock_irqsave()
> 
> Now, I don't pretend to understand the condition before send_sigtrap(),
> so it _might_ be ok, but it sure as heck could do with a comment.

Or that force_sig_info() in send_sigtrap() looks like it can easily be
change to use an irq work queue.

-- Steve
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