linux-kernel - Re: [regression] suspend stress test stalls within 30 minutes

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Date: Fri, 17 May 2024 10:22:32 -0700
From: Dave Hansen <dave.hansen@...el.com>
To: Kalle Valo <kvalo@...nel.org>, Borislav Petkov <bp@...en8.de>
Cc: Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>,
 Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
 Dave Hansen <dave.hansen@...ux.intel.com>,
 "Rafael J. Wysocki" <rafael@...nel.org>, x86@...nel.org,
 linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
 regressions@...ts.linux.dev, Jeff Johnson <quic_jjohnson@...cinc.com>
Subject: Re: [regression] suspend stress test stalls within 30 minutes

On 5/17/24 10:15, Kalle Valo wrote:
> Borislav Petkov <bp@...en8.de> writes:
>> There might be some #GP or so in the logs in case we've managed to f*ck
>> up microcode application which emulates that IBRS MSR bit and the
>> actual toggling or so when suspending...
> So the weird part is that when the bug happens (ie. suspend stalls) I
> can access the box normally using ssh and I don't see anything special
> in dmesg. Below is a full copy of dmesg output after the suspend
> stalled. Do note that I copied this dmesg before I updated microcode so
> it will still show the old microcode version.
> 
> Let me know if you need more info.

Kalle, could you remind us what we're seeing here?  Does this show 30
working rtcwake tests followed by a failure at "rtcwake test 31" where
the system failed to suspend?