linux-kernel - Re: [PATCH 1/2] kernel: set taint flag 'L' at any kind of lockup

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Message-ID: <87eevzwsv9.fsf@nanos.tec.linutronix.de>
Date:   Thu, 16 Jan 2020 12:19:54 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Konstantin Khlebnikov <khlebnikov@...dex-team.ru>,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org
Cc:     Sasha Levin <sashal@...nel.org>, Kees Cook <keescook@...omium.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        rcu@...r.kernel.org, Tejun Heo <tj@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 1/2] kernel: set taint flag 'L' at any kind of lockup

Konstantin Khlebnikov <khlebnikov@...dex-team.ru> writes:
> Any lockup or stall notifies about unexpected lack of progress.
> It's better to know about them for further problem investigations.
>
> Right now only softlockup has own taint flag. Let's generalize it.
>
> This patch renames TAINT_SOFTLOCKUP into TAINT_LOCKUP at sets it for:

Please search 'This patch' in Documentation/process/submitting-patches.rst

> - softlockup
> - hardlockup
> - RCU stalls
> - stuck in workqueues
> - detected task hung

This does too many things at once and wants to be split in pieces:

  1) Change the TAINT flag and update documentation

  2) Add the tainting to the places which are not yet covered

Thanks,

        tglx