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From: <cl@rock-chips.com>
To: heiko@sntech.de
Cc: mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com,
	vincent.guittot@linaro.org, dietmar.eggemann@arm.com,
	rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de,
	akpm@linux-foundation.org, tglx@linutronix.de,
	mpe@ellerman.id.au, surenb@google.com, ben.dooks@codethink.co.uk,
	anshuman.khandual@arm.com, catalin.marinas@arm.com,
	will@kernel.org, keescook@chromium.org, luto@amacapital.net,
	wad@chromium.org, mark.rutland@arm.com, geert+renesas@glider.be,
	george_davis@mentor.com, sudeep.holla@arm.com,
	linux@armlinux.org.uk, gregkh@linuxfoundation.org,
	info@metux.net, kstewart@linuxfoundation.org,
	allison@lohutok.net, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, huangtao@rock-chips.com,
	Liang Chen <cl@rock-chips.com>
Subject: [PATCH v3 0/1] wait_task_inactive() spend too much time on system startup
Date: Fri,  6 Mar 2020 15:01:32 +0800	[thread overview]
Message-ID: <20200306070133.18335-1-cl@rock-chips.com> (raw)

From: Liang Chen <cl@rock-chips.com>

Changelog:
v1: wait_task_inactive() frequently call schedule_hrtimeout() and spend a lot of time,
i am trying to optimize it on rockchip platform.
v2: Use atomic_flags(PFA) instead of TIF flag, and add some comments.
v3: Use a new method fix this issue to make the code simple.

Liang Chen (1):
  kthread: do not preempt current task if it is going to call schedule()

 kernel/kthread.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

-- 
2.17.1




             reply	other threads:[~2020-03-06  7:01 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-06  7:01 cl [this message]
2020-03-06  7:01 ` [PATCH v3 1/1] kthread: do not preempt current task if it is going to call schedule() cl
2020-03-06 17:09   ` Steven Rostedt
2020-03-11 15:39   ` Peter Zijlstra
2020-03-20 12:58   ` [tip: sched/core] kthread: Do " tip-bot2 for Liang Chen

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