From: bill4carson@gmail.com (bill4carson)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] hotplug: eliminate warning "Unknown IPI message 0x1"
Date: Mon, 13 Feb 2012 09:07:56 +0800 [thread overview]
Message-ID: <4F38626C.5030607@gmail.com> (raw)
In-Reply-To: <20120210095955.GT889@n2100.arm.linux.org.uk>
On 2012?02?10? 17:59, Russell King - ARM Linux wrote:
> On Fri, Feb 10, 2012 at 05:27:53PM +0800, Bill Carson wrote:
>> When playing hotplug on vexpress board, a tiny warning pops out.
>>
>> /sys/devices/system/cpu # echo 0> cpu3/online
>> CPU3: shutdown
>> /sys/devices/system/cpu # echo 1> cpu3/online
>> CPU3: Booted secondary processor
>> Calibrating delay loop (skipped) already calibrated this CPU
>> CPU3: Unknown IPI message 0x1
>> ^^^^^^^
>> It's a phony warning caused by handle_IPI as a result of calling
>> gic_raise_softirq(cpumask_of(cpu), 1). Introducing a new ipi_msg_type
>> IPI_WAKEUP_CPU to make this warning go away.
>
> NAK. I want people to move to SGI0 for this, so that we can have SGI1-N
> as the proper IPIs. The reason _I_ haven't done this is because it's
> totally unclear whether anyone relies on the current IPI number.
>
Thanks for your explanation, now I understand what's going on here.
--
I am a slow learner
but I will keep trying to fight for my dreams!
--bill
prev parent reply other threads:[~2012-02-13 1:07 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-10 9:27 [PATCH V1] hotplug: eliminate warning Unknown IPI message 0x1 Bill Carson
2012-02-10 9:27 ` [PATCH] hotplug: eliminate warning "Unknown IPI message 0x1" Bill Carson
2012-02-10 9:59 ` Russell King - ARM Linux
2012-02-13 1:07 ` bill4carson [this message]
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