From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Li Zhong <zhong@linux.vnet.ibm.com>
Cc: Paul Mackerras <paulus@samba.org>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
PowerPC email list <linuxppc-dev@lists.ozlabs.org>
Subject: Re: [PATCH powerpc ] Avoid debug_smp_processor_id() check in arch_spin_unlock_wait()
Date: Fri, 25 Jan 2013 08:44:49 +1100 [thread overview]
Message-ID: <1359063889.29726.36.camel@pasglop> (raw)
In-Reply-To: <1359022384.2666.46.camel@ThinkPad-T5421.cn.ibm.com>
On Thu, 2013-01-24 at 18:13 +0800, Li Zhong wrote:
> I'm not very clear about the "risk" you mentioned above. It seems to me
> that the freeing of lppaca only appeared in free_unused_pacas(), called
> by early setup code, at which time hotplug seems impossible.
>
> I must missed something ...
No you are right, we don't free them at the moment.
> I'll update the SHARED_PROCESSOR directly, it seems better to me now.
> (wonder why I gave it up immediately when it first came into my mind
> while I was doing the last update...)
Cheers,
Ben.
next prev parent reply other threads:[~2013-01-24 21:45 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-19 6:16 [RFC PATCH powerpc ] Protect smp_processor_id() in arch_spin_unlock_wait() Li Zhong
2013-01-10 6:02 ` Benjamin Herrenschmidt
2013-01-10 7:50 ` Li Zhong
2013-01-10 9:00 ` [PATCH powerpc ] Avoid debug_smp_processor_id() check " Li Zhong
2013-01-24 3:47 ` Benjamin Herrenschmidt
2013-01-24 10:13 ` Li Zhong
2013-01-24 21:44 ` Benjamin Herrenschmidt [this message]
2013-01-25 7:51 ` [PATCH v2 powerpc ] Avoid debug_smp_processor_id() check in SHARED_PROCESSOR Li Zhong
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