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    SubjectRe: [PATCH] sched: Provide USF for the portable equipment.
    On Thu, Jul 30, 2020 at 09:35:42PM +0800, Dongdong Yang wrote:
    > From: Dongdong Yang <yangdongdong@xiaomi.com>
    >
    > This patch provides USF(User Sensitive Feedback factor)
    > auxiliary cpufreq governor to support high level layer
    > sysfs inodes setting for utils adjustment purpose from
    > the identified scenario on portable equipment.
    > Because the power consumption and UI response are more
    > cared for by portable equipment users. And the "screen
    > off" status stands for no request from the user, however,
    > the kernel is still expected to notify the user in time
    > on modem, network or powerkey events occur. USF provides
    > "sched_usf_non_ux_r" sysfs inode to cut down the utils
    > from user space tasks according to high level scenario.
    > In addition, it usually hints more cpufreq demand that
    > the preemptive counts of the tasks on the cpu burst and
    > over the user expecting completed time such as the ratio
    > sysctl_sched_latency to sysctl_sched_min_granularity
    > on "screen on" status, which more likely with more UI.
    > The sysfs inodes "sched_usf_up_l0_r" and "sched_usf_down_r"
    > have been provided to adjust the utils according to high
    > level identified scenario to alloc the cpufreq in time.
    >
    > Dongdong Yang (1):
    > sched: Provide USF for portable equipment.
    >
    > drivers/staging/Kconfig | 2 +
    > drivers/staging/Makefile | 1 +
    > drivers/staging/fbsched/Kconfig | 10 ++
    > drivers/staging/fbsched/Makefile | 2 +
    > drivers/staging/fbsched/usf.c | 351 +++++++++++++++++++++++++++++++++++++++
    > kernel/sched/cpufreq_schedutil.c | 11 +-
    > 6 files changed, 376 insertions(+), 1 deletion(-)
    > create mode 100644 drivers/staging/fbsched/Kconfig
    > create mode 100644 drivers/staging/fbsched/Makefile
    > create mode 100644 drivers/staging/fbsched/usf.c

    For new staging drivers/code, we need a TODO file that lists what
    remains to be done on the code to get it out of staging/

    I don't see any good reason why this has to go to staging now, what
    prevents it from being merged to the "real" part of the kernel today?

    thanks,

    greg k-h

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