linux-kernel - Re: CONFIG_ANDROID (was: rcu_sched detected expedited stalls in amdgpu after suspend)

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Date:   Tue, 28 Jun 2022 17:13:24 +0200
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     "Alex Xu (Hello71)" <alex_y_xu@...oo.ca>
Cc:     paulmck@...nel.org, rcu@...r.kernel.org, urezki@...il.com,
        uladzislau.rezki@...y.com,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arve Hjønnevåg <arve@...roid.com>,
        Todd Kjos <tkjos@...roid.com>,
        Martijn Coenen <maco@...roid.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        Christian Brauner <christian@...uner.io>,
        Hridya Valsaraju <hridya@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        linux-kernel@...r.kernel.org, wireguard@...ts.zx2c4.com,
        Theodore Ts'o <tytso@....edu>, alexander.deucher@....com,
        christian.koenig@....com, Xinhui.Pan@....com,
        amd-gfx@...ts.freedesktop.org
Subject: Re: CONFIG_ANDROID (was: rcu_sched detected expedited stalls in
 amdgpu after suspend)

Hi Alex,

On Tue, Jun 28, 2022 at 11:02:40AM -0400, Alex Xu (Hello71) wrote:
> WireGuard and random also use CONFIG_ANDROID in a similar "proxy" way as 
> rcu, there to see if suspends are "frequent". This seems dubious for the 
> same reasons.

I'd be happy to take a patch in WireGuard and random.c to get rid of the
CONFIG_ANDROID usage, if you can conduct an analysis and conclude this
won't break anything inadvertently.

Jason