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

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Date: Sat, 11 May 2024 23:26:49 +0300
From: Kalle Valo <kvalo@...nel.org>
To: Borislav Petkov <bp@...en8.de>
Cc: 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

Borislav Petkov <bp@...en8.de> writes:

> On Sat, May 11, 2024 at 08:48:47PM +0200, Borislav Petkov wrote:
>> On Sat, May 11, 2024 at 09:22:43PM +0300, Kalle Valo wrote:
>> > Here's the diff between broken and working .config:
>> > 
>> > $ diffconfig broken.config works.config 
>> > -CALL_PADDING y
>> > -CALL_THUNKS y
>> > -CALL_THUNKS_DEBUG n
>> > -HAVE_CALL_THUNKS y
>> > -MITIGATION_CALL_DEPTH_TRACKING y
>> > -MITIGATION_GDS_FORCE y
>> > -MITIGATION_IBPB_ENTRY y
>> > -MITIGATION_IBRS_ENTRY y
>> > -MITIGATION_PAGE_TABLE_ISOLATION y
>> > -MITIGATION_RETHUNK y
>> > -MITIGATION_RETPOLINE y
>> > -MITIGATION_RFDS y
>> > -MITIGATION_SLS y
>> > -MITIGATION_SPECTRE_BHI y
>
> ... and if it started with -rc4, I'd try this one first.

I'm not sure if this bug started with -rc4, let's say somewhere between
-rc3 and -rc6. I'll start with disabling MITIGATION_SPECTRE_BHI and then
I'll disable them one by one. But that has to wait next week, tomorrow
is Mother's Day in Finland.

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