From: Borislav Petkov <bp@alien8.de>
To: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: Borislav Petkov <bp@suse.de>, James Feeney <james@nurealm.net>,
linux-smp@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
lkml <linux-kernel@vger.kernel.org>,
Zhang Rui <rui.zhang@intel.com>, x86-ml <x86@kernel.org>
Subject: Re: [PATCH] x86/thermal: Fix LVT thermal setup for SMI delivery mode
Date: Thu, 27 May 2021 21:01:35 +0200 [thread overview]
Message-ID: <YK/sjypdlYbk/NHC@zn.tnic> (raw)
In-Reply-To: <d2d7d50f274d5143305282c99491ebe590f33ccd.camel@linux.intel.com>
On Thu, May 27, 2021 at 11:09:59AM -0700, Srinivas Pandruvada wrote:
> My guess is that system is booting hot sometimes. SMM started fan or
> some cooling and set a temperature threshold. It is waiting for thermal
> interrupt for temperature threshold, which it never got.
Are you saying that that replication of lvtthmr_init to the APs in
intel_init_thermal() is absolutely needed on those SMI machines running
hot?
That thing:
* If BIOS takes over the thermal interrupt and sets its interrupt
* delivery mode to SMI (not fixed), it restores the value that the
* BIOS has programmed on AP based on BSP's info we saved since BIOS
* is always setting the same value for all threads/cores.
?
Me moving that lvtthmr_init read later would replicate the wrong value
because we'd soft-disable the APIC and thus the core would lockup
waiting...
The other interesting thing is that the core would always lockup when
trying to IPI another core to remote-flush the TLBs.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2021-05-27 19:02 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <8a9599b2-f4fe-af9b-90f5-af39c315ec2f@nurealm.net>
2021-05-17 8:32 ` linux 5.12 - fails to boot - soft lockup - CPU#0 stuck for 23s! - RIP smp_call_function_single Borislav Petkov
2021-05-19 3:58 ` James Feeney
2021-05-19 11:12 ` Borislav Petkov
2021-05-19 20:03 ` James Feeney
2021-05-19 21:18 ` Borislav Petkov
2021-05-20 3:12 ` James Feeney
2021-05-20 9:21 ` Borislav Petkov
2021-05-21 22:11 ` James Feeney
2021-05-22 9:06 ` Borislav Petkov
2021-05-22 23:28 ` James Feeney
2021-05-23 17:05 ` Borislav Petkov
2021-05-23 23:02 ` James Feeney
2021-05-24 7:51 ` Borislav Petkov
2021-05-25 4:02 ` James Feeney
2021-05-27 10:31 ` [PATCH] x86/thermal: Fix LVT thermal setup for SMI delivery mode Borislav Petkov
2021-05-27 11:49 ` Thomas Gleixner
2021-05-27 11:56 ` Borislav Petkov
2021-05-27 18:54 ` Borislav Petkov
2021-05-28 8:23 ` Thomas Gleixner
2021-05-28 11:19 ` Borislav Petkov
2021-05-31 18:26 ` James Feeney
2021-05-27 18:09 ` Srinivas Pandruvada
2021-05-27 19:01 ` Borislav Petkov [this message]
2021-05-27 20:28 ` Srinivas Pandruvada
2021-05-28 7:05 ` James Feeney
2021-05-31 21:46 ` [tip: x86/urgent] " tip-bot2 for Borislav Petkov
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