Messages in this thread |  | | Subject | Re: thermal throttling on xps13: unchecked MSR access error | From | srinivas pandruvada <> | Date | Tue, 13 Dec 2022 18:12:51 -0800 |
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Hi Linus,
Sorry about the issue.
On Tue, 2022-12-13 at 16:35 -0800, Linus Torvalds wrote: > Hmm. > > I don't think I've seen this before on my trusty old x86 laptop (XPS > 13 9380 - it's a few years old) > > unchecked MSR access error: WRMSR to 0x1b1 > (tried to write 0x0000000004000aa8) > at rIP: 0xffffffff8b8559fe (throttle_active_work+0xbe/0x1b0) > You got a (PROCHOT#) throttling event.
> I'm blaming one of > > 930d06bf071a ("thermal: intel: Protect clearing of thermal status > bits") > 6fe1e64b6026 ("thermal: intel: Prevent accidental clearing of HFI > status") > This is to blame. I am able to reproduce on an old system.
I sent a patch " thermal: intel: Don't set HFI status bit to 1"
Please check.
Thanks, Srinivas
> with no real reason apart from being the last commit to touch that > function, but also when it started happening. > > The first kernel I see this for is 6.1.0-03225-g764822972d64, but > honestly, it's possible that it has happened before too, and the real > issue is that the machine just happened to be hot and throttling at > bootup and/or I just didn't notice. > > The CPU in this thing is a > > Intel(R) Core(TM) i7-8565U CPU @ 1.80GHz > > which hopefully makes somebody go "Ahh, yes, I missed that case". > > I don't *think* the MSR access checking has changed, but maybe it > did, > and I'm barking up the wrong tree. > > Anybody? > > Linus
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