From: Grygorii Strashko <grygorii.strashko@ti.com>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Steven Rostedt <rostedt@goodmis.org>
Cc: <linux-kernel@vger.kernel.org>,
linux-rt-users <linux-rt-users@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Carsten Emde <C.Emde@osadl.org>, John Kacur <jkacur@redhat.com>,
Paul Gortmaker <paul.gortmaker@windriver.com>
Subject: Re: [PATCH RT 11/20] ARM: imx: always use TWD on IMX6Q
Date: Mon, 18 Jul 2016 20:18:59 +0300 [thread overview]
Message-ID: <578D0F83.2010403@ti.com> (raw)
In-Reply-To: <20160712200429.GA4302@linutronix.de>
On 07/12/2016 11:04 PM, Sebastian Andrzej Siewior wrote:
> * Steven Rostedt | 2016-07-12 10:24:16 [-0400]:
>
>> 4.1.27-rt31-rc1 stable review patch.
>> If anyone has any objections, please let me know.
>
> I don't recommend to cherry-pick this. The symbol it selects
> (HAVE_ARM_TWD) has "depends on SMP" in v4.1. In v4.4 there should be
> AM43xx which is UP and also uses the TWD so the change is simple here.
>
yes. AM43xx is UP and supports ARM TWD, but there could be some 'issues' in !RT case :(
ARM TWD might be powered off in deep CPU Idle states and lose its context if !RT & CPUIDLE,
so there are should be backup broadcast timer configured. And that can cause build issues
related to tick_broadcast()->smp_cross_call().
I've solved it locally for OMAP2 only: commit 0b3e6fca4d1af4aa150d32506220f4241323a00c
^Just FYI. But may be it can be done in more generic way.
regards,
-grygorii
next prev parent reply other threads:[~2016-07-18 18:19 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-12 14:24 [PATCH RT 00/20] Linux 4.1.27-rt31-rc1 Steven Rostedt
2016-07-12 14:24 ` [PATCH RT 01/20] ARM: at91: pm: simply call at91_pm_init Steven Rostedt
2016-07-12 14:24 ` [PATCH RT 02/20] ARM: at91: pm: find and remap the pmc Steven Rostedt
2016-07-12 14:24 ` [PATCH RT 03/20] ARM: at91: pm: move idle functions to pm.c Steven Rostedt
2016-07-12 14:24 ` [PATCH RT 04/20] ARM: at91: remove useless includes and function prototypes Steven Rostedt
2016-07-12 14:24 ` [PATCH RT 05/20] usb: gadget: atmel: access the PMC using regmap Steven Rostedt
2016-07-12 14:24 ` [PATCH RT 06/20] kvm, rt: change async pagefault code locking for PREEMPT_RT Steven Rostedt
2016-07-12 14:24 ` [PATCH RT 07/20] mm/zsmalloc: Use get/put_cpu_light in zs_map_object()/zs_unmap_object() Steven Rostedt
2016-07-12 14:24 ` [PATCH RT 08/20] net: dev: always take qdiscs busylock in __dev_xmit_skb() Steven Rostedt
2016-07-12 14:24 ` [PATCH RT 09/20] drivers/block/zram: Replace bit spinlocks with rtmutex for -rt Steven Rostedt
2016-07-12 14:24 ` [PATCH RT 10/20] list_bl: fixup bogus lockdep warning Steven Rostedt
2016-07-12 14:24 ` [PATCH RT 11/20] ARM: imx: always use TWD on IMX6Q Steven Rostedt
2016-07-12 20:04 ` Sebastian Andrzej Siewior
2016-07-12 20:25 ` Steven Rostedt
2016-07-18 17:18 ` Grygorii Strashko [this message]
2016-07-12 14:24 ` [PATCH RT 12/20] drivers/block/zram: fixup compile for !RT Steven Rostedt
2016-07-12 14:24 ` [PATCH RT 13/20] perf/x86/intel/rapl: Make PMU lock raw Steven Rostedt
2016-07-12 14:24 ` [PATCH RT 14/20] sched,preempt: Fix preempt_count manipulations Steven Rostedt
2016-07-12 14:24 ` [PATCH RT 15/20] kernel/printk: Dont try to print from IRQ/NMI region Steven Rostedt
2016-07-12 14:24 ` [PATCH RT 16/20] arm: lazy preempt: correct resched condition Steven Rostedt
2016-07-12 14:24 ` [PATCH RT 17/20] locallock: add local_lock_on() Steven Rostedt
2016-07-12 14:24 ` [PATCH RT 18/20] mm: perform lru_add_drain_all() remotely Steven Rostedt
2016-07-12 14:24 ` [PATCH RT 19/20] trace: correct off by one while recording the trace-event Steven Rostedt
2016-07-12 14:24 ` [PATCH RT 20/20] Linux 4.1.27-rt31-rc1 Steven Rostedt
2016-07-12 23:18 ` Linux 4.1.27-rt31-rc2 Steven Rostedt
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