From: Kevin Hilman <khilman@kernel.org>
To: Joonyoung Shim <jy0922.shim@samsung.com>
Cc: "linux-samsung-soc@vger.kernel.org"
<linux-samsung-soc@vger.kernel.org>,
a.kesavan@samsung.com, k.chander@samsung.com,
mauro.ribeiro@hardkernel.com, abhijeet@abhijeet-dev.net
Subject: Re: exynos5422-odroid-xu3: MCPM: only 6 of 8 CPUs coming online
Date: Thu, 23 Oct 2014 11:01:05 -0700 [thread overview]
Message-ID: <7h8uk6acny.fsf@deeprootsystems.com> (raw)
In-Reply-To: <54485730.10803@samsung.com> (Joonyoung Shim's message of "Thu, 23 Oct 2014 10:17:36 +0900")
Joonyoung Shim <jy0922.shim@samsung.com> writes:
[...]
>> One more problem, cpu0 doesn't boot after offline and system is halted.
>>
>> # echo 0 > /sys/devices/system/cpu/cpu0/online
>> [ 28.027852] IRQ152 no longer affine to CPU0
>> [ 28.028087] IRQ256 no longer affine to CPU0
>> [ 28.028344] CPU0: shutdown
>> #
>> # echo 1 > /sys/devices/system/cpu/cpu0/online
>>
>> So, it's failed script[1] to test MCPM functionalities
>>
>> Thanks.
>>
>> [1]: http://www.spinics.net/lists/arm-kernel/msg330946.html
FYI... this hotplug problem happens with or without the patch to bring
all 8 CPUs online, so it's not related to that fix.
Also, it only happens with the bL switcher enabled, and not with the
switcher disabled. Since the bL switcher is built on top of hotplug,
I'm not sure if the switcher deals well with CPUs being hotplugged
without it knowing.
Kevin
next prev parent reply other threads:[~2014-10-23 18:01 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-09 3:06 exynos5422-odroid-xu3: MCPM: only 6 of 8 CPUs coming online Abhilash Kesavan
2014-10-09 21:58 ` Kevin Hilman
2014-10-15 11:35 ` Joonyoung Shim
2014-10-17 12:06 ` Kevin Hilman
2014-10-23 1:04 ` Joonyoung Shim
2014-10-23 1:17 ` Joonyoung Shim
2014-10-23 1:25 ` Mauro Ribeiro
2014-10-23 1:36 ` Joonyoung Shim
2014-10-23 1:42 ` Mauro Ribeiro
2014-10-23 1:49 ` Joonyoung Shim
2014-10-23 1:54 ` Joonyoung Shim
2014-10-23 8:36 ` Abhijeet Dev
[not found] ` <CAG30XQJ29cM6=OFh=TTbR2rfWGt3AK1o2=PMqdoq6ejUJtUwGA@mail.gmail.com>
[not found] ` <A804D1798D614199AFA7AEDC00248EA9@sisodomain.com>
2014-10-23 15:56 ` Kevin Hilman
2014-10-24 14:33 ` Abhilash Kesavan
2014-10-24 16:00 ` Kevin Hilman
2014-10-25 12:47 ` Mauro Ribeiro
2014-10-27 19:00 ` Kevin Hilman
2014-10-23 18:01 ` Kevin Hilman [this message]
-- strict thread matches above, loose matches on Subject: below --
2014-10-08 18:58 Kevin Hilman
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