From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org,
dwalker@mvista.com
Subject: Re: [PATCH] 2.6.18-rt7: PowerPC: fix breakage in threaded fasteoi type IRQ handlers
Date: Tue, 21 Nov 2006 07:09:45 +1100 [thread overview]
Message-ID: <1164053385.8073.24.camel@localhost.localdomain> (raw)
In-Reply-To: <20061120165621.GA1504@elte.hu>
On Mon, 2006-11-20 at 17:56 +0100, Ingo Molnar wrote:
> * Sergei Shtylyov <sshtylyov@ru.mvista.com> wrote:
>
> > >on PPC64, 'get the vector' initiates an ACK as well - is that done
> > >before handle_irq() is done?
> >
> > Exactly. How else do_IRQ() would know the vector?
>
> the reason i'm asking is that in this case masking is a bit late at this
> point and there's a chance for a repeat interrupt.
What do you mean by a bit late ?
You can't mask before you know what interrupt occured so you don't
really have a choice there :-) I'm pretty sure that mask + eoi is what
Apple does on Darwin too though.
Cheers,
Ben.
WARNING: multiple messages have this Message-ID (diff)
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>,
linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org,
dwalker@mvista.com
Subject: Re: [PATCH] 2.6.18-rt7: PowerPC: fix breakage in threaded fasteoi type IRQ handlers
Date: Tue, 21 Nov 2006 07:09:45 +1100 [thread overview]
Message-ID: <1164053385.8073.24.camel@localhost.localdomain> (raw)
In-Reply-To: <20061120165621.GA1504@elte.hu>
On Mon, 2006-11-20 at 17:56 +0100, Ingo Molnar wrote:
> * Sergei Shtylyov <sshtylyov@ru.mvista.com> wrote:
>
> > >on PPC64, 'get the vector' initiates an ACK as well - is that done
> > >before handle_irq() is done?
> >
> > Exactly. How else do_IRQ() would know the vector?
>
> the reason i'm asking is that in this case masking is a bit late at this
> point and there's a chance for a repeat interrupt.
What do you mean by a bit late ?
You can't mask before you know what interrupt occured so you don't
really have a choice there :-) I'm pretty sure that mask + eoi is what
Apple does on Darwin too though.
Cheers,
Ben.
next prev parent reply other threads:[~2006-11-20 20:09 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-19 19:43 [PATCH] 2.6.18-rt7: PowerPC: fix breakage in threaded fasteoi type IRQ handlers Sergei Shtylyov
2006-11-19 19:43 ` Sergei Shtylyov
2006-11-19 20:00 ` Benjamin Herrenschmidt
2006-11-19 20:00 ` Benjamin Herrenschmidt
2006-11-19 20:04 ` Benjamin Herrenschmidt
2006-11-19 20:04 ` Benjamin Herrenschmidt
2006-11-19 20:11 ` Sergei Shtylyov
2006-11-19 20:11 ` Sergei Shtylyov
2006-11-19 20:06 ` Ingo Molnar
2006-11-19 20:06 ` Ingo Molnar
2006-11-19 20:19 ` Benjamin Herrenschmidt
2006-11-19 20:19 ` Benjamin Herrenschmidt
2006-11-19 20:23 ` Ingo Molnar
2006-11-19 20:23 ` Ingo Molnar
2006-11-19 20:31 ` Sergei Shtylyov
2006-11-19 20:31 ` Sergei Shtylyov
2006-11-19 20:36 ` Benjamin Herrenschmidt
2006-11-19 20:36 ` Benjamin Herrenschmidt
2006-11-19 20:42 ` Sergei Shtylyov
2006-11-19 20:42 ` Sergei Shtylyov
2006-11-19 20:45 ` Benjamin Herrenschmidt
2006-11-19 20:45 ` Benjamin Herrenschmidt
2006-11-19 20:49 ` Benjamin Herrenschmidt
2006-11-19 20:49 ` Benjamin Herrenschmidt
2006-11-20 1:16 ` Benjamin Herrenschmidt
2006-11-20 1:16 ` Benjamin Herrenschmidt
2006-11-20 10:01 ` Ingo Molnar
2006-11-20 10:01 ` Ingo Molnar
2006-11-20 15:29 ` Sergei Shtylyov
2006-11-20 15:29 ` Sergei Shtylyov
2006-11-20 16:56 ` Ingo Molnar
2006-11-20 16:56 ` Ingo Molnar
2006-11-20 17:03 ` Sergei Shtylyov
2006-11-20 17:03 ` Sergei Shtylyov
2006-11-20 17:26 ` Ingo Molnar
2006-11-20 17:26 ` Ingo Molnar
2006-11-20 17:55 ` Ingo Molnar
2006-11-20 17:55 ` Ingo Molnar
2006-11-20 18:20 ` Daniel Walker
2006-11-20 18:20 ` Daniel Walker
2006-11-20 18:29 ` Ingo Molnar
2006-11-20 18:29 ` Ingo Molnar
2006-11-20 18:30 ` Sergei Shtylyov
2006-11-20 18:30 ` Sergei Shtylyov
2006-11-20 19:10 ` Ingo Molnar
2006-11-20 19:10 ` Ingo Molnar
2006-11-20 19:11 ` Ingo Molnar
2006-11-20 19:11 ` Ingo Molnar
2006-11-20 19:18 ` Sergei Shtylyov
2006-11-20 19:18 ` Sergei Shtylyov
2006-11-20 19:24 ` Sergei Shtylyov
2006-11-20 19:24 ` Sergei Shtylyov
2006-11-20 19:23 ` Ingo Molnar
2006-11-20 20:11 ` Benjamin Herrenschmidt
2006-11-20 20:11 ` Benjamin Herrenschmidt
2006-11-20 20:09 ` Benjamin Herrenschmidt [this message]
2006-11-20 20:09 ` Benjamin Herrenschmidt
2006-11-20 16:25 ` Daniel Walker
2006-11-20 16:25 ` Daniel Walker
2006-11-20 16:42 ` Ingo Molnar
2006-11-20 17:01 ` Daniel Walker
2006-11-20 20:07 ` Benjamin Herrenschmidt
2006-11-20 20:07 ` Benjamin Herrenschmidt
2006-11-19 20:26 ` Sergei Shtylyov
2006-11-19 20:26 ` Sergei Shtylyov
2006-11-19 20:32 ` Benjamin Herrenschmidt
2006-11-19 20:32 ` Benjamin Herrenschmidt
2006-11-19 20:40 ` Sergei Shtylyov
2006-11-19 20:40 ` Sergei Shtylyov
2006-11-19 20:41 ` Benjamin Herrenschmidt
2006-11-19 20:41 ` Benjamin Herrenschmidt
2006-11-19 20:52 ` Sergei Shtylyov
2006-11-19 20:52 ` Sergei Shtylyov
2006-11-19 21:08 ` Benjamin Herrenschmidt
2006-11-19 21:08 ` Benjamin Herrenschmidt
2006-11-20 15:46 ` Sergei Shtylyov
2006-11-20 15:46 ` Sergei Shtylyov
2006-11-19 20:44 ` Sergei Shtylyov
2006-11-19 20:48 ` Benjamin Herrenschmidt
2007-05-17 13:20 ` [PATCH 2.6.21-rt2] PowerPC: revert fix for threaded fasteoi " Sergei Shtylyov
2007-05-17 13:20 ` Sergei Shtylyov
2007-07-12 16:47 ` Sergei Shtylyov
2007-07-12 16:52 ` Thomas Gleixner
2007-07-12 16:52 ` Thomas Gleixner
2007-07-13 17:19 ` Sergei Shtylyov
2007-07-13 17:19 ` Sergei Shtylyov
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