From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: gshan <Gavin.Shan@alcatel-lucent.com>
Cc: linuxppc-dev@lists.ozlabs.org
Subject: Re: spin_lock_irqsave and multi-core
Date: Thu, 01 Apr 2010 13:39:05 +1100 [thread overview]
Message-ID: <1270089545.7101.84.camel@pasglop> (raw)
In-Reply-To: <4BB3FE05.6040800@alcatel-lucent.com>
On Thu, 2010-04-01 at 09:59 +0800, gshan wrote:
> On multi-core system, spin_lock_irqsave() can stop all CPU cores
> receiving interrupts?
No.
> If the answer is no, what we can do to disable external interrupt for
> all CPU cores?
You don't :-)
Really, you generally don't. Why would you want to do that ?
Cheers,
Ben.
next prev parent reply other threads:[~2010-04-01 2:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-01 1:59 spin_lock_irqsave and multi-core gshan
2010-04-01 2:39 ` Benjamin Herrenschmidt [this message]
2010-04-01 2:41 ` gshan
2010-04-01 2:56 ` Benjamin Herrenschmidt
2010-04-01 3:18 ` gshan
2010-04-01 4:45 ` Benjamin Herrenschmidt
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