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Filename Latest commit message Latest commit date
Thomas Gleixner 60bda037f1 posix-cpu-timers: Utilize timerqueue for storage
Using a linear O(N) search for timer insertion affects execution time and
D-cache footprint badly with a larger number of timers.

Switch the storage to a timerqueue which is already used for hrtimers and
alarmtimers. It does not affect the size of struct k_itimer as it.alarm is
still larger.

The extra list head for the expiry list will go away later once the expiry
is moved into task work context.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Link: https://lkml.kernel.org/r/alpine.DEB.2.21.1908272129220.1939@nanos.tec.linutronix.de
2019-08-28 11:50:43 +02:00
arch arm64: dts: imx8mq: Add system counter node 2019-08-27 00:31:39 +02:00
block hrtimer/treewide: Use hrtimer_sleeper_start_expires() 2019-08-01 17:43:16 +02:00
certs
crypto
Documentation dt-bindings: timer: renesas, cmt: Update R-Car Gen3 CMT1 usage 2019-08-27 00:31:39 +02:00
drivers clocksource/drivers/sh_cmt: Document "cmt-48" as deprecated 2019-08-27 00:31:39 +02:00
fs timerfd: Prepare for PREEMPT_RT 2019-08-01 20:51:23 +02:00
include posix-cpu-timers: Utilize timerqueue for storage 2019-08-28 11:50:43 +02:00
init posix-cpu-timers: Move state tracking to struct posix_cputimers 2019-08-28 11:50:42 +02:00
ipc
kernel posix-cpu-timers: Utilize timerqueue for storage 2019-08-28 11:50:43 +02:00
lib
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net hrtimer/treewide: Use hrtimer_sleeper_start_expires() 2019-08-01 17:43:16 +02:00
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README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.