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From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
	Frederic Weisbecker <frederic@kernel.org>,
	Yunfeng Ye <yeyunfeng@huawei.com>
Subject: [patch 0/7] tick: Cleanups and reduce jiffies_seq held times
Date: Tue, 17 Nov 2020 14:19:42 +0100	[thread overview]
Message-ID: <20201117131942.515430545@linutronix.de> (raw)

Yunfeng proposed a change to tick_do_update_jiffies64() to reduce the
contention on jiffies_seq sequence counter:

  https://lore.kernel.org/r/ac822c72-673e-73e1-9622-c5f12591b373@huawei.com

This made me look deeper and there are lots of other things to optimize,
but also things to document which are completely undocumented today.

The lot is based on 

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git timers/core

and also available via git from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git tick

Thanks,

	tglx


             reply	other threads:[~2020-11-17 14:24 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-17 13:19 Thomas Gleixner [this message]
2020-11-17 13:19 ` [patch 1/7] tick/broadcast: Serialize access to tick_next_period Thomas Gleixner
2020-11-19  9:55   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2020-11-17 13:19 ` [patch 2/7] tick: Document protections for tick related data Thomas Gleixner
2020-11-19  9:55   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2020-11-17 13:19 ` [patch 3/7] tick/sched: Use tick_next_period for lockless quick check Thomas Gleixner
2020-11-19  9:55   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2020-11-17 13:19 ` [patch 4/7] tick/sched: Reduce seqcount held scope in tick_do_update_jiffies64() Thomas Gleixner
2020-11-19  9:55   ` [tip: timers/core] " tip-bot2 for Yunfeng Ye
2020-11-17 13:19 ` [patch 5/7] tick/sched: Optimize tick_do_update_jiffies64() further Thomas Gleixner
2020-11-19  9:55   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2020-11-17 13:19 ` [patch 6/7] tick/sched: Release seqcount before invoking calc_load_global() Thomas Gleixner
2020-11-19  9:55   ` [tip: timers/core] " tip-bot2 for Yunfeng Ye
2020-11-17 13:19 ` [patch 7/7] tick: Get rid of tick_period Thomas Gleixner
2020-11-19  9:55   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner

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