From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Dave Liu <r63238@freescale.com>
Cc: ppc-dev <linuxppc-dev@ozlabs.org>,
Paul Mackerras <paulus@samba.org>,
Kumar Gala <galak@gate.crashing.org>
Subject: Re: fsl booke MM vs. SMP questions
Date: Wed, 23 May 2007 13:08:56 +1000 [thread overview]
Message-ID: <1179889736.32247.893.camel@localhost.localdomain> (raw)
In-Reply-To: <1179887929.3656.2.camel@localhost.localdomain>
On Wed, 2007-05-23 at 10:38 +0800, Dave Liu wrote:
> On Wed, 2007-05-23 at 08:42 +1000, Benjamin Herrenschmidt wrote:
>
> > The IPIs should be buffered by the PIC ... delivered only once but
>
> but what is the buffer depth for IPIs in the PIC?
One :-)
You never "loose" IPIs in the sense that you always get at least 1
interrupt for N IPIs and it's up to software to make sure not to lose
any event. The linux kernel arch code usually handles that with a
synchronous IPI mecanism.
Ben.
next prev parent reply other threads:[~2007-05-23 3:09 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-21 7:06 fsl booke MM vs. SMP questions Benjamin Herrenschmidt
[not found] ` <1179741447.3660.7.camel@localhost.localdomain>
[not found] ` <1179742083.32247.689.camel@localhost.localdomain>
2007-05-21 11:37 ` Dave Liu
2007-05-21 22:07 ` Benjamin Herrenschmidt
2007-05-22 3:09 ` Benjamin Herrenschmidt
2007-05-22 10:56 ` Dave Liu
2007-05-22 22:42 ` Benjamin Herrenschmidt
2007-05-23 2:38 ` Dave Liu
2007-05-23 3:08 ` Benjamin Herrenschmidt [this message]
2007-05-28 9:05 ` Liu Dave-r63238
2007-05-28 9:24 ` Benjamin Herrenschmidt
2007-05-28 9:37 ` Liu Dave-r63238
2007-05-28 10:00 ` Benjamin Herrenschmidt
2007-05-28 10:23 ` Gabriel Paubert
2007-05-28 10:28 ` Benjamin Herrenschmidt
2007-05-22 8:46 ` Gabriel Paubert
2007-05-22 9:14 ` Benjamin Herrenschmidt
2007-05-22 10:02 ` Gabriel Paubert
2007-05-22 10:05 ` Benjamin Herrenschmidt
2007-05-23 9:12 ` Gabriel Paubert
2007-05-22 3:03 ` Kumar Gala
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