From: marc.zyngier@arm•com (Marc Zyngier)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v2 00/15] Make SMP timers standalone
Date: Thu, 05 Jan 2012 11:35:56 +0000 [thread overview]
Message-ID: <4F058B1C.2070109@arm.com> (raw)
In-Reply-To: <20120105112602.GQ11810@n2100.arm.linux.org.uk>
On 05/01/12 11:26, Russell King - ARM Linux wrote:
> On Thu, Jan 05, 2012 at 11:19:32AM +0000, Marc Zyngier wrote:
>> Global timer is still present, configured and enabled. The kernel just
>> happens to select TWD as a better timer. Should TWD be turned off,
>> gp_timer will be selected again.
>
> And at that point, the core time keeping code will find a local timer
> clock event structure and expect it's broadcast method to be implemented
> and working, as I described in my initial reply.
>
>> This is also what happens with the current implementation, and my
>> patches don't change that.
>
> Yes they do, because they omit the broadcast method.
I forgot to mention I restored this functionality after you pointed that
out (I made smp_timer_broadcast a global symbol).
> Look, local timers *are* special. They're not the same as global timers.
> They're treated differently. Ripping out the local timer setup stuff
> from the SMP code is not the right solution, especially when we've
> already got a separation of the local timer core from the hardware
> implementation.
OK. I'll try to work out something different.
M.
--
Jazz is not dead. It just smells funny...
next prev parent reply other threads:[~2012-01-05 11:35 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-22 17:27 [PATCH v2 00/15] Make SMP timers standalone Marc Zyngier
2011-12-22 17:27 ` [PATCH v2 01/15] ARM: local timers: allow smp_twd to be used standalone Marc Zyngier
2011-12-22 20:38 ` Russell King - ARM Linux
2011-12-22 17:27 ` [PATCH v2 02/15] ARM: smp_twd: add device tree support Marc Zyngier
2011-12-22 17:27 ` [PATCH v2 03/15] ARM: local timers: switch realview to standalone smp_twd Marc Zyngier
2011-12-22 17:27 ` [PATCH v2 04/15] ARM: local timers: switch vexpress " Marc Zyngier
2011-12-22 17:27 ` [PATCH v2 05/15] ARM: local timers: remove localtimer.c from plat-versatile Marc Zyngier
2011-12-22 17:27 ` [PATCH v2 06/15] ARM: local timers: switch tegra to standalone smp_twd Marc Zyngier
2011-12-22 19:22 ` Colin Cross
2011-12-22 17:27 ` [PATCH v2 07/15] ARM: local timers: switch omap4 " Marc Zyngier
2011-12-23 6:37 ` Shilimkar, Santosh
2011-12-22 17:27 ` [PATCH v2 08/15] ARM: local timers: switch shmobile " Marc Zyngier
2011-12-22 17:27 ` [PATCH v2 09/15] ARM: local timers: switch ux500 " Marc Zyngier
2011-12-22 17:27 ` [PATCH v2 10/15] ARM: local timers: switch highbank " Marc Zyngier
2011-12-22 17:27 ` [PATCH v2 11/15] ARM: local timers: switch imx6q " Marc Zyngier
2011-12-25 13:40 ` Shawn Guo
2011-12-22 17:27 ` [PATCH v2 12/15] ARM: smp_twd: remove support for non-standalone version Marc Zyngier
2011-12-22 17:27 ` [PATCH v2 13/15] ARM: local timers: make MCT timer standalone Marc Zyngier
2011-12-22 17:27 ` [PATCH v2 14/15] ARM: local timers: make MSM timers standalone Marc Zyngier
2011-12-22 17:27 ` [PATCH v2 15/15] ARM: local timers: Remove CONFIG_LOCAL_TIMERS support Marc Zyngier
2011-12-22 19:32 ` [PATCH v2 00/15] Make SMP timers standalone Russell King - ARM Linux
2012-01-04 17:39 ` Marc Zyngier
2012-01-04 21:47 ` Russell King - ARM Linux
2012-01-05 0:00 ` Linus Walleij
2012-01-05 11:08 ` Marc Zyngier
2012-01-05 11:13 ` Shilimkar, Santosh
2012-01-05 11:19 ` Marc Zyngier
2012-01-05 11:26 ` Russell King - ARM Linux
2012-01-05 11:35 ` Marc Zyngier [this message]
2012-01-05 12:10 ` Russell King - ARM Linux
2012-01-05 16:13 ` Marc Zyngier
2012-01-05 16:26 ` Russell King - ARM Linux
2012-01-05 16:55 ` Russell King - ARM Linux
2012-01-05 11:31 ` Shilimkar, Santosh
2012-01-05 10:33 ` Marc Zyngier
2012-01-05 10:45 ` Shilimkar, Santosh
2012-01-05 1:17 ` David Brown
2012-01-05 10:26 ` Linus Walleij
2012-01-05 11:01 ` Russell King - ARM Linux
2012-01-05 19:34 ` johlstei
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