linux-kernel - Re: rasdaemon broke between v6.0 and v6.3?

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Message-ID: <20230720030317.GC94963@cathedrallabs.org>
Date:   Wed, 19 Jul 2023 23:03:17 -0400
From:   Aristeu Rozanski <aris@...vo.org>
To:     Tony Luck <tony.luck@...el.com>
Cc:     rostedt@...dmis.org, linux-kernel@...r.kernel.org
Subject: Re: rasdaemon broke between v6.0 and v6.3?

On Wed, Jul 19, 2023 at 04:35:54PM -0700, Tony Luck wrote:
> [resend as plain text - sorry for the earlier HTML]
> 
> An internal team is seeing tests that worked on v6.0 fail on v6.3. The problem is that
> rasdaemon isn’t waking up to process the “mce_record” trace events.
> 
> Manually checking for them works:
> 
> root@...251:/sys/kernel/debug/tracing>systemctl stop rasdaemon
> root@...251:/sys/kernel/debug/tracing>
> root@...251:/sys/kernel/debug/tracing>
> root@...251:/sys/kernel/debug/tracing>echo 1 > events/mce/mce_record/enable
> root@...251:/sys/kernel/debug/tracing>
> root@...251:/sys/kernel/debug/tracing>cat trace_pipe
>            <...>-235     [000] .....   596.892583: mce_record: CPU: 0, MCGc/s: f000c15/0, MC13: 8c00004200800090, IPID: 0000000000000000, ADDR/MISC/SYND: 0000000123450000/08000a80c2982086/0000000000000000, RIP: 00:<0000000000000000>, TSC: 14120b051a1, PROCESSOR: 0:c06f1, TIME: 1689802780, SOCKET: 0, APIC: 0
>      kworker/0:2-235     [000] .....   597.204343: mce_record: CPU: 0, MCGc/s: f000c15/0, MC255: 9c0000000000009f, IPID: 0000000000000000, ADDR/MISC/SYND: 0000000123450000/000000000000008c/0000000000000000, RIP: 00:<0000000000000000>, TSC: 0, PROCESSOR: 0:c06f1, TIME: 1689802781, SOCKET: 0, APIC: 0
> 
> So their tests are injecting errors, and the trace event is firing.
> 
> Is there some updated version of rasdaemon needed?
> 
> Some kernel CONFIG option problem?

Looks like you're hitting the issue this commit is supposed to fix:
http://git.infradead.org/users/mchehab/rasdaemon.git/commit/6986d818e6d2c846c001fc7211b5a4153e5ecd11

-- 
Aristeu