linux-kernel - [PATCH v2 0/3] Binder: Enable App Freezing Capability

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Message-Id: <20210311184629.589725-1-dualli@chromium.org>
Date:   Thu, 11 Mar 2021 10:46:26 -0800
From:   Li Li <dualli@...omium.org>
To:     dualli@...gle.com, tkjos@...gle.com, gregkh@...uxfoundation.org,
        christian@...uner.io, arve@...roid.com, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org, maco@...gle.com, hridya@...gle.com,
        surenb@...gle.com
Cc:     joel@...lfernandes.org, kernel-team@...roid.com
Subject: [PATCH v2 0/3] Binder: Enable App Freezing Capability

From: Li Li <dualli@...gle.com>

To improve the user experience when switching between recently used
applications, the background applications which are not currently needed
are cached in the memory. Normally, a well designed application will not
consume valuable CPU resources in the background. However, it's possible
some applications are not able or willing to behave as expected, wasting
energy even after being cached.

It is a good idea to freeze those applications when they're only being
kept alive for the sake of faster startup and energy saving. These kernel
patches will provide the necessary infrastructure for user space framework
to freeze and thaw a cached process, check the current freezing status and
correctly deal with outstanding binder transactions to frozen processes.

Changes in v2: avoid panic by using pr_warn for unexpected cases.

Marco Ballesio (3):
  binder: BINDER_FREEZE ioctl
  binder: use EINTR for interrupted wait for work
  binder: BINDER_GET_FROZEN_INFO ioctl

 drivers/android/binder.c            | 200 ++++++++++++++++++++++++++--
 drivers/android/binder_internal.h   |  18 +++
 include/uapi/linux/android/binder.h |  20 +++
 3 files changed, 226 insertions(+), 12 deletions(-)

-- 
2.31.0.rc2.261.g7f71774620-goog