linux-kernel - Re: [PATCH v6] power: suspend: Move dpm_watchdog to suspend.c and enhance it

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Date:   Tue, 23 Mar 2021 15:08:59 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Joseph Jang <josephjang@...gle.com>
Cc:     "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Pavel Machek <pavel@....cz>, Len Brown <len.brown@...el.com>,
        Petr Mladek <pmladek@...e.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Kees Cook <keescook@...omium.org>,
        Anton Vorontsov <anton@...msg.org>,
        Colin Cross <ccross@...roid.com>,
        Tony Luck <tony.luck@...el.com>,
        "David S . Miller " <davem@...emloft.net>,
        Rob Herring <robh@...nel.org>,
        Lukas Bulwahn <lukas.bulwahn@...il.com>,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        jonglin@...gle.com, woodylin@...gle.com, markcheng@...gle.com
Subject: Re: [PATCH v6] power: suspend: Move dpm_watchdog to suspend.c and
 enhance it

On Thu, Jan 28, 2021 at 05:39:27PM +0800, Joseph Jang wrote:
> Since dpm_watchdog just cover two functions __device_suspend() and
> device_resume(), we proposed to move it to core power suspend.c to extend
> its coverage and monitor more devices suspend hand issues.
> 
> We propose to use new name suspend watchdog and new timeout handler to
> cover more sleep hang issues. The new timeout handler will dump disk
> sleep task call trace at first round timeout and trigger kernel panic
> at second round timeout.
> The default timer for each round is defined in
> CONFIG_PM_SUSPEND_WATCHDOG_TIMEOUT.
> 
> Signed-off-by: Joseph Jang <josephjang@...gle.com>

Seems sane, but I'm not the maintainer of this stuff:

Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>