linux-kernel - Re: [PATCH v1 0/3] introduce priority-based shutdown support

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Message-ID: <ZWDGGqsCq9iSnHtO@finisterre.sirena.org.uk>
Date:   Fri, 24 Nov 2023 15:49:46 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Oleksij Rempel <o.rempel@...gutronix.de>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>, kernel@...gutronix.de,
        linux-kernel@...r.kernel.org, linux-mmc@...r.kernel.org,
        linux-pm@...r.kernel.org,
        Søren Andersen <san@...v.dk>
Subject: Re: [PATCH v1 0/3] introduce priority-based shutdown support

On Fri, Nov 24, 2023 at 03:27:48PM +0000, Greg Kroah-Hartman wrote:
> On Fri, Nov 24, 2023 at 03:21:40PM +0000, Mark Brown wrote:

> > This came out of some discussions about trying to handle emergency power
> > failure notifications.

> I'm sorry, but I don't know what that means.  Are you saying that the
> kernel is now going to try to provide a hard guarantee that some devices
> are going to be shut down in X number of seconds when asked?  If so, why
> not do this in userspace?

No, it was initially (or when I initially saw it anyway) handling of
notifications from regulators that they're in trouble and we have some
small amount of time to do anything we might want to do about it before
we expire.

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