linux-kernel - Re: [patch V2 00/20] timer: Refactor the timer wheel

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Message-ID: <CADyApD01eTgZ7UQy+SZFHsEwdD5qu=O5Z9_mSTZmdwFeXmk=Zw@mail.gmail.com>
Date:	Mon, 20 Jun 2016 07:46:11 -0700
From:	Arjan van de Ven <arjanvandeven@...il.com>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Eric Dumazet <edumazet@...gle.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Chris Mason <clm@...com>,
	Arjan van de Ven <arjan@...radead.org>, rt@...utronix.de,
	Rik van Riel <riel@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	George Spelvin <linux@...encehorizons.net>,
	Len Brown <lenb@...nel.org>
Subject: Re: [patch V2 00/20] timer: Refactor the timer wheel

On Mon, Jun 20, 2016 at 6:56 AM, Thomas Gleixner <tglx@...utronix.de> wrote:
>
> 2) Cut off at 37hrs for HZ=1000. We could make this configurable as a 1000HZ
>    option so datacenter folks can use this and people who don't care and want
>    better batching for power can use the 4ms thingy.


if there really is one user of such long timers... could we possibly
make that one robust against early fire of the timer?

eg rule is: if you set timers > 37 hours, you need to cope with early timer fire