Messages in this thread | | | Subject | Re: [PATCH] powerpc/powernv: Add kernel cmdline parameter to disable imc | From | Madhavan Srinivasan <> | Date | Thu, 12 Oct 2017 13:35:05 +0530 |
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On Thursday 12 October 2017 01:21 PM, Stewart Smith wrote: > Anju T Sudhakar <anju@linux.vnet.ibm.com> writes: >> On Wednesday 11 October 2017 01:55 AM, Stewart Smith wrote: >>> Michael Ellerman <mpe@ellerman.id.au> writes: >>>> Anju T Sudhakar <anju@linux.vnet.ibm.com> writes: >>>> >>>>> Add a kernel command line parameter option to disable In-Memory Collection >>>>> (IMC) counters and add documentation. This helps in debug. >>>> I'd really rather we didn't. Do we *really* need this? >>>> >>>> We don't have command line parameters to disable any of the other ~20 >>>> PMUs, why is this one special? >> This one is really helpful in debugging, incase if we want to proceed >> without nest counters OR >> core counters . But if we have the facility to do the same from >> petitboot, its fine. > https://patchwork.ozlabs.org/patch/824497/ (skiboot patch) should do the > same thing, right? That means we come up with them off (as we should > have from the start) and if you don't use the PMUs then the ucode won't > be started. Stewart,
Thats right. With that skiboot patch, IMC will be paused at start.
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