From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [SMP BUG?] the return value of is_smp() is bug?
Date: Mon, 01 Sep 2014 10:49:09 +0200 [thread overview]
Message-ID: <2846720.hM0WuNVsDY@wuerfel> (raw)
In-Reply-To: <1409571334-2814-1-git-send-email-long.wanglong@huawei.com>
On Monday 01 September 2014 19:35:34 Wang Long wrote:
> In kernel 3.17-rc2, when i set CONFIG_HAVE_SMP = y and CONFIG_SMP_ON_UP = y
> in .config file. the secondary core can not boot.
>
> when i set CONFIG_HAVE_SMP = y and CONFIG_SMP_ON_UP = n in .config file,
> the secondary core can boot.
>
> But this does not happen in kernel 3.10 lts kernel, Whether the
> CONFIG_SMP_ON_UP is set yes or no ,the secondary core can boot.
>
> Does the meaning of CONFIG_SMP_ON_UP changed or this is a bug in kernel 3.17-rc2 ?
>
>
> I write the following patch to test the return value of is_smp().
>
Can you check the value of CONFIG_SMP?
CONFIG_HAVE_SMP is set by platforms that allow enabling SMP, but you
still have the choice to set CONFIG_SMP on or off.
Arnd
next prev parent reply other threads:[~2014-09-01 8:49 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-01 11:35 [SMP BUG?] the return value of is_smp() is bug? Wang Long
2014-09-01 8:49 ` Arnd Bergmann [this message]
2014-09-01 10:19 ` Russell King - ARM Linux
2014-09-04 1:01 ` long.wanglong
-- strict thread matches above, loose matches on Subject: below --
2014-09-01 11:15 Wang Long
2014-09-01 5:49 Wang Long
2014-09-01 10:00 ` long.wanglong
2014-09-01 10:26 ` Arnd Bergmann
2014-09-04 1:13 ` long.wanglong
2014-09-04 8:33 ` Peter Maydell
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