From: "Jason A. Donenfeld" <Jason@zx2c4.com>
To: Christoph Hellwig <hch@lst.de>
Cc: "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Arve Hjønnevåg" <arve@android.com>,
"Todd Kjos" <tkjos@android.com>,
"Martijn Coenen" <maco@android.com>,
"Joel Fernandes" <joel@joelfernandes.org>,
"Christian Brauner" <brauner@kernel.org>,
"Hridya Valsaraju" <hridya@google.com>,
"Suren Baghdasaryan" <surenb@google.com>,
"Theodore Ts'o" <tytso@mit.edu>,
"David S. Miller" <davem@davemloft.net>,
"Eric Dumazet" <edumazet@google.com>,
"Jakub Kicinski" <kuba@kernel.org>,
"Alex Xu (Hello71)" <alex_y_xu@yahoo.ca>,
"Paolo Abeni" <pabeni@redhat.com>,
"Rob Herring" <robh@kernel.org>,
"Paul E. McKenney" <paulmck@kernel.org>,
"Frederic Weisbecker" <frederic@kernel.org>,
"Neeraj Upadhyay" <quic_neeraju@quicinc.com>,
"Josh Triplett" <josh@joshtriplett.org>,
"Steven Rostedt" <rostedt@goodmis.org>,
"Mathieu Desnoyers" <mathieu.desnoyers@efficios.com>,
"Lai Jiangshan" <jiangshanlai@gmail.com>,
"Shuah Khan" <shuah@kernel.org>,
linux-kernel@vger.kernel.org, wireguard@lists.zx2c4.com,
netdev@vger.kernel.org, rcu@vger.kernel.org,
linux-kselftest@vger.kernel.org, sultan@kerneltoast.com
Subject: Re: [PATCH] remove CONFIG_ANDROID
Date: Wed, 29 Jun 2022 19:34:58 +0200 [thread overview]
Message-ID: <YryNQvWGVwCjJYmB@zx2c4.com> (raw)
In-Reply-To: <Yrx/8UOY+J8Ao3Bd@zx2c4.com>
On Wed, Jun 29, 2022 at 06:38:09PM +0200, Jason A. Donenfeld wrote:
> On the technical topic, an Android developer friend following this
> thread just pointed out to me that Android doesn't use PM_AUTOSLEEP and
> just has userspace causing suspend frequently. So by his rough
> estimation your patch actually *will* break Android devices. Zoinks.
> Maybe he's right, maybe he's not -- I don't know -- but you should
> probably look into this if you want this patch to land without breakage.
More details: https://cs.android.com/android/platform/superproject/+/master:system/core/libsuspend/autosuspend_wakeup_count.cpp;bpv=1;bpt=1;l=52?q=%22%2Fsys%2Fpower%2Fstate%22&start=51&gsn=sys_power_state&gs=kythe%3A%2F%2Fandroid.googlesource.com%2Fplatform%2Fsuperproject%3Flang%3Dc%252B%252B%3Fpath%3Dsystem%2Fcore%2Flibsuspend%2Fautosuspend_wakeup_count.cpp%23ftWlDJuOhS_2fn3Ri7rClxA30blj_idGgT12aoUHd1o
So indeed it looks like it's userspace controlled. If you want this to
be a runtime, rather than a compiletime, switch, maybe
autosuspend_init() of that file could write to a sysctl.
Who at Google "owns" that code? Can somebody CC them in?
Jason
next prev parent reply other threads:[~2022-06-29 17:37 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-29 15:01 Christoph Hellwig
2022-06-29 15:01 ` [PATCH] " Christoph Hellwig
2022-06-29 15:27 ` Greg Kroah-Hartman
2022-06-29 16:07 ` Paul E. McKenney
2022-06-29 16:09 ` Jason A. Donenfeld
2022-06-29 16:10 ` Christoph Hellwig
2022-06-29 16:13 ` Jason A. Donenfeld
2022-06-29 16:15 ` Christoph Hellwig
2022-06-29 16:25 ` Jason A. Donenfeld
2022-06-29 16:30 ` Christoph Hellwig
2022-06-29 16:38 ` Jason A. Donenfeld
2022-06-29 16:45 ` Christoph Hellwig
2022-06-29 16:52 ` Jason A. Donenfeld
2022-06-29 17:00 ` Greg Kroah-Hartman
2022-06-29 17:10 ` Jason A. Donenfeld
2022-06-29 17:19 ` Greg Kroah-Hartman
2022-06-29 17:30 ` Jason A. Donenfeld
2022-06-29 17:35 ` Christoph Hellwig
2022-06-29 17:42 ` Jason A. Donenfeld
2022-06-29 18:59 ` Paul E. McKenney
2022-06-29 16:56 ` Steven Rostedt
2022-06-29 17:19 ` Jason A. Donenfeld
2022-06-29 17:34 ` Jason A. Donenfeld [this message]
2022-06-29 19:05 ` Kalesh Singh
2022-06-29 19:41 ` Theodore Ts'o
2022-06-29 20:47 ` Jason A. Donenfeld
2022-06-29 22:26 ` Kalesh Singh
2022-06-29 23:02 ` Jason A. Donenfeld
2022-06-29 23:19 ` Kalesh Singh
2022-06-30 0:36 ` Joe Perches
2022-06-30 0:50 ` Jason A. Donenfeld
2022-06-30 1:44 ` Joe Perches
2022-06-30 3:02 ` Jason A. Donenfeld
2022-06-29 23:52 ` John Stultz
2022-06-30 0:24 ` Jason A. Donenfeld
2022-06-30 0:30 ` Jason A. Donenfeld
2022-06-30 4:25 ` Kalesh Singh
2022-06-30 10:05 ` Jason A. Donenfeld
2022-06-30 17:12 ` John Stultz
2022-06-30 17:24 ` Jason A. Donenfeld
2022-07-01 20:22 ` Jonathan Corbet
2022-07-01 20:53 ` Jason A. Donenfeld
2022-06-29 16:34 ` Paul E. McKenney
2022-06-29 16:37 ` Christoph Hellwig
2022-06-29 16:45 ` Jason A. Donenfeld
2022-06-29 17:04 ` Paul E. McKenney
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=YryNQvWGVwCjJYmB@zx2c4.com \
--to=jason@zx2c4.com \
--cc=alex_y_xu@yahoo.ca \
--cc=arve@android.com \
--cc=brauner@kernel.org \
--cc=davem@davemloft.net \
--cc=edumazet@google.com \
--cc=frederic@kernel.org \
--cc=gregkh@linuxfoundation.org \
--cc=hch@lst.de \
--cc=hridya@google.com \
--cc=jiangshanlai@gmail.com \
--cc=joel@joelfernandes.org \
--cc=josh@joshtriplett.org \
--cc=kuba@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=maco@android.com \
--cc=mathieu.desnoyers@efficios.com \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
--cc=paulmck@kernel.org \
--cc=quic_neeraju@quicinc.com \
--cc=rcu@vger.kernel.org \
--cc=robh@kernel.org \
--cc=rostedt@goodmis.org \
--cc=shuah@kernel.org \
--cc=sultan@kerneltoast.com \
--cc=surenb@google.com \
--cc=tkjos@android.com \
--cc=tytso@mit.edu \
--cc=wireguard@lists.zx2c4.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).