linux-kernel - Re: [PATCH 0/6] A few cpuidle vs rcu fixes

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <Y9AIj1s5iPPki3dK@FVFF77S0Q05N>
Date:   Tue, 24 Jan 2023 16:34:23 +0000
From:   Mark Rutland <mark.rutland@....com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     mingo@...nel.org, will@...nel.org, boqun.feng@...il.com,
        tglx@...utronix.de, bp@...en8.de, dave.hansen@...ux.intel.com,
        x86@...nel.org, hpa@...or.com, seanjc@...gle.com,
        pbonzini@...hat.com, jgross@...e.com, srivatsa@...il.mit.edu,
        amakhalov@...are.com, pv-drivers@...are.com, rostedt@...dmis.org,
        mhiramat@...nel.org, wanpengli@...cent.com, vkuznets@...hat.com,
        boris.ostrovsky@...cle.com, rafael@...nel.org,
        daniel.lezcano@...aro.org, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        bsegall@...gle.com, mgorman@...e.de, bristot@...hat.com,
        vschneid@...hat.com, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org,
        linux-trace-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Subject: Re: [PATCH 0/6] A few cpuidle vs rcu fixes

Hi Peter,

On Mon, Jan 23, 2023 at 09:50:09PM +0100, Peter Zijlstra wrote:
> 0-day robot reported graph-tracing made the cpuidle-vs-rcu rework go splat.

Do you have a link toe the splat somewhere?

I'm assuming that this is partially generic, and I'd like to make sure I test
the right thing on arm64. I'll throw my usual lockdep options at the ftrace
selftests...

Thanks,
Mark.

> 
> These patches appear to cure this, the ftrace selftest now runs to completion
> without spamming scary messages to dmesg.
> 
> ---
>  arch/x86/include/asm/atomic64_32.h | 44 +++++++++++++++++++-------------------
>  arch/x86/include/asm/atomic64_64.h | 36 +++++++++++++++----------------
>  arch/x86/include/asm/kvmclock.h    |  2 +-
>  arch/x86/include/asm/paravirt.h    |  2 +-
>  arch/x86/include/asm/pvclock.h     |  3 ++-
>  arch/x86/kernel/cpu/vmware.c       |  2 +-
>  arch/x86/kernel/ftrace.c           |  3 +++
>  arch/x86/kernel/kvmclock.c         |  6 +++---
>  arch/x86/kernel/pvclock.c          | 22 +++++++++++++------
>  arch/x86/kernel/tsc.c              |  7 +++---
>  arch/x86/xen/time.c                | 12 +++++++++--
>  drivers/cpuidle/cpuidle.c          |  2 +-
>  drivers/cpuidle/poll_state.c       |  2 --
>  include/linux/math64.h             |  4 ++--
>  include/linux/sched/clock.h        |  8 +++----
>  kernel/sched/clock.c               | 27 +++++++++++++++++------
>  16 files changed, 107 insertions(+), 75 deletions(-)
> 
>