Messages in this thread | | | Date | Thu, 28 Jan 2016 20:56:52 +0100 (CET) | From | Thomas Gleixner <> | Subject | Re: [PATCH 01/31] Add hard/soft lockup debugger entry points |
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On Thu, 28 Jan 2016, Jeffrey Merkey wrote:
> This patch series adds an export which can be set by system debuggers to > direct the hard lockup and soft lockup detector to trigger a breakpoint > exception and enter a debugger if one is active. It is assumed that if > someone sets this variable, then an breakpoint handler of some sort will > be actively loaded or registered via the notify die handler chain. > > This addition is extremely useful for debugging hard and soft lockups > real time and quickly from a console debugger.
Why do we need an extra breakpoint instruction in the code to enter a debugger? Don't have debuggers mechanisms to install breakpoints?
I'm probably missing something obvious here.
Thanks,
tglx
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