linux-kernel - Re: [PATCH] pm/sleep: Add PM_USERSPACE

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Message-ID: <Yr6yhnZNkCDgde9z@kroah.com>
Date:   Fri, 1 Jul 2022 10:38:30 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     "Jason A. Donenfeld" <Jason@...c4.com>
Cc:     Kalesh Singh <kaleshsingh@...gle.com>, jstultz@...gle.com,
        paulmck@...nel.org, rostedt@...dmis.org, rafael@...nel.org,
        hch@...radead.org, saravanak@...gle.com, tjmercier@...gle.com,
        surenb@...gle.com, kernel-team@...roid.com,
        Theodore Ts'o <tytso@....edu>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
        linux-kernel@...r.kernel.org, wireguard@...ts.zx2c4.com,
        netdev@...r.kernel.org, linux-pm@...r.kernel.org
Subject: Re: [PATCH] pm/sleep: Add PM_USERSPACE_AUTOSLEEP Kconfig

On Thu, Jun 30, 2022 at 09:49:24PM +0200, Jason A. Donenfeld wrote:
> Hi Kalesh,
> 
> On Thu, Jun 30, 2022 at 07:12:29PM +0000, Kalesh Singh wrote:
> > Systems that initiate frequent suspend/resume from userspace
> > can make the kernel aware by enabling PM_USERSPACE_AUTOSLEEP
> > config.
> > 
> > This allows for certain sleep-sensitive code (wireguard/rng) to
> > decide on what preparatory work should be performed (or not) in
> > their pm_notification callbacks.
> > 
> > This patch was prompted by the discussion at [1] which attempts
> > to remove CONFIG_ANDROID that currently guards these code paths.
> > 
> > [1] https://lore.kernel.org/r/20220629150102.1582425-1-hch@lst.de/
> > 
> > Suggested-by: Jason A. Donenfeld <Jason@...c4.com>
> > Signed-off-by: Kalesh Singh <kaleshsingh@...gle.com>
> 
> Thanks, looks good to me. Do you have a corresponding Gerrit link to the
> change adding this to the base Android kernel config? If so, have my
> Ack:
> 
>     Acked-by: Jason A. Donenfeld <Jason@...c4.com>

Cool, I'll queue this up and also the CONFIG_ANDROID removal into my
tree now, thanks all for working it out!

greg k-h