From: Scott Wood <scottwood@freescale.com>
To: Segher Boessenkool <segher@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>, linuxppc-dev@ozlabs.org
Subject: Re: [PATCH] qe_ic: Do a sync when masking interrupts.
Date: Mon, 23 Oct 2006 13:27:09 -0500 [thread overview]
Message-ID: <453D097D.6090603@freescale.com> (raw)
In-Reply-To: <F886CBFA-4710-4185-AA99-92EDEE3F2FE8@kernel.crashing.org>
Segher Boessenkool wrote:
> If a sync after an MMIO write is enough, then (in almost all
> cases) so is an eieio.
In this case, the spurious interrupts still happen with eieio, but not
with sync. It's probably synchronizing the MMIO write with some
unrelated load from memory (such as reading the stack frame to return
from the mask function, or reading action->flags to determine whether to
check for IRQ_DISABLED).
-Scott
next prev parent reply other threads:[~2006-10-23 18:27 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-23 15:30 RE: [PATCH] qe_ic: Do a sync when masking interrupts Michael R. Zucca
2006-10-23 16:49 ` Segher Boessenkool
2006-10-23 18:27 ` Scott Wood [this message]
2006-10-23 18:46 ` Segher Boessenkool
2006-10-24 7:17 ` Li Yang-r58472
2006-10-25 3:51 ` Benjamin Herrenschmidt
2006-10-25 4:47 ` Liu Dave-r63238
-- strict thread matches above, loose matches on Subject: below --
2006-10-23 18:53 Scott Wood
2006-10-19 18:03 Scott Wood
2006-10-20 3:03 ` Li Yang-r58472
2006-10-23 3:59 ` Paul Mackerras
2006-10-23 9:35 ` Li Yang-r58472
2006-10-23 15:19 ` Scott Wood
2006-10-23 15:29 ` Scott Wood
2006-10-23 17:52 ` Kumar Gala
2006-10-23 18:22 ` Scott Wood
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