Messages in this thread | | | From | Stefan Schaeckeler <> | Subject | Re: [PATCH 0/1] i2c: imc: Add support for Intel iMC SMBus host controller. | Date | Sun, 5 Apr 2020 14:40:59 -0700 (PDT) |
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Hello Wolfram,
> > > This patch is based on Andy Lutomirski's iMC SMBus driver patch-set > > > https://lkml.org/lkml/2016/4/28/926. It never made it into the kernel. I hope > > > this rewrite will: > > > > > > > > > Overview > > > > > > Modern Intel memory controllers host an SMBus controller and connection to > > > DIMMs and their thermal sensors. The memory controller firmware has three modes > > > of operation: Closed Loop Thermal Throttling (CLTT), Open Loop Thermal > > > Throttling (OLTT) and none. > > > > > > - CLTT: The memory controller firmware is periodically accessing the DIMM > > > temperature sensor over the SMBus. > > > > > > > > > I think this is great! One question, though: what happens if the > > system is in CLTT mode but you disable CLTT and claim the bus for too > > long? For example, if there's an infinite loop or other lockup which > > you have the tsod polling interval set to 0? Does the system catch > > fire or does the system do something intelligent like temporarily > > switching to open loop? > > Any news on this question?
Thank you for your interest in this patch. You can read my reply here https://lkml.org/lkml/2020/3/1/216
Stefan
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