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flush[_delayed]_work_sync() were deprecated by 4382973 ("workqueue:
deprecate flush[_delayed]_work_sync()") and have been deprecated
for a long time. In addition, these are not used anymore. So,
let's remove these functions.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Tejun Heo <tj@kernel.org>
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__cancel_delayed_work() was deprecated by 136b5721d75a ("workqueue:
deprecate __cancel_delayed_work()") as cancel_delayed_work() was
updated so that it could be used from all contexts. Enough time has
passed since the deprecation. Let's remove it.
tj: description update
Signed-off-by: Tan Xiaojun <tanxiaojun@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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checkpatch.pl complained about two single statement macros in
do while (0) loops. The loops and the trailing semicolons are
now removed, which makes checkpatch happy and the two macros
consistent with the rest of the file.
Signed-off-by: Valentin Rothberg <valentinrothberg@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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WORK_CPU_END is totally unused since 4e8b22bd1a37 ("workqueue: fix
pool ID allocation leakage and remove BUILD_BUG_ON() in
init_workqueues"). It should be removed.
After it is removed, the comment "special cpu IDs" is not precise due to
there is only one special CPU ID (WORK_CPU_UNBOUND) left, so we also
change this comment to the description for WORK_CPU_UNBOUND.
tj: Minor description and comment tweaks.
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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flush_scheduled_work() is just a simple call to flush_work().
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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In 8930caba3dbd ("workqueue: disable irq while manipulating PENDING"),
setting last CPU and clearing PENDING got merged into a single
operation (set_work_cpu_and_clear_pending()), which resulted that the
internal routine work_clear_pending() is not used any more.
tj: Minor description tweak.
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
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If a delayed or deferrable work is on stack we need to tell debug
objects that we are destroying the timer and the work. Otherwise we
leak the tracking object.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Acked-by: Tejun Heo <tj@kernel.org>
Link: http://lkml.kernel.org/r/20140323141939.911487677@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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commit 0a94efb5acbb6980d7c9ab604372d93cd507e4d8 upstream.
5c0338c68706 ("workqueue: restore WQ_UNBOUND/max_active==1 to be
ordered") automatically enabled ordered attribute for unbound
workqueues w/ max_active == 1. Because ordered workqueues reject
max_active and some attribute changes, this implicit ordered mode
broke cases where the user creates an unbound workqueue w/ max_active
== 1 and later explicitly changes the related attributes.
This patch distinguishes explicit and implicit ordered setting and
overrides from attribute changes if implict.
Signed-off-by: Tejun Heo <tj@kernel.org>
Fixes: 5c0338c68706 ("workqueue: restore WQ_UNBOUND/max_active==1 to be ordered")
Cc: Holger Hoffstätte <holger@applied-asynchrony.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Willy Tarreau <w@1wt.eu>
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This patch adds system wide workqueues aligned towards power saving. This is
done by allocating them with WQ_UNBOUND flag if 'wq_power_efficient' is set to
'true'.
tj: updated comments a bit.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
(cherry picked from commit 0668106ca3865ba945e155097fb042bf66d364d3)
Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Stefan Guendhoer <stefan@guendhoer.com>
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Workqueues can be performance or power-oriented. Currently, most workqueues are
bound to the CPU they were created on. This gives good performance (due to cache
effects) at the cost of potentially waking up otherwise idle cores (Idle from
scheduler's perspective. Which may or may not be physically idle) just to
process some work. To save power, we can allow the work to be rescheduled on a
core that is already awake.
Workqueues created with the WQ_UNBOUND flag will allow some power savings.
However, we don't change the default behaviour of the system. To enable
power-saving behaviour, a new config option CONFIG_WQ_POWER_EFFICIENT needs to
be turned on. This option can also be overridden by the
workqueue.power_efficient boot parameter.
tj: Updated config description and comments. Renamed
CONFIG_WQ_POWER_EFFICIENT to CONFIG_WQ_POWER_EFFICIENT_DEFAULT.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
(cherry picked from commit cee22a15052faa817e3ec8985a28154d3fabc7aa)
Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Stefan Guendhoer <stefan@guendhoer.com>
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