From: Daniel Walker <dwalker@mvista.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Russell King - ARM Linux <linux@arm.linux.org.uk>,
Remy Bohmer <linux@bohmer.net>,
RT <linux-rt-users@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
ARM Linux Mailing List <linux-arm-kernel@lists.arm.linux.org.uk>,
Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>
Subject: Re: [PATCH PREEMPT_RT]: On AT91 ARM: GPIO Interrupt handling can/will stall forever
Date: Wed, 28 Nov 2007 12:44:31 -0800 [thread overview]
Message-ID: <1196282672.27964.32.camel@imap.mvista.com> (raw)
In-Reply-To: <Pine.LNX.4.58.0711281510580.4247@gandalf.stny.rr.com>
On Wed, 2007-11-28 at 15:16 -0500, Steven Rostedt wrote:
>
> This could also simply be unique to the interrupt threads (only in RT). So
> perhaps the patch is OK.
>
> Remy, sorry about this round-a-bout. But I don't have any of the hardware
> that this affects, and I'm just being cautious.
Ignoring the ARM side of things for a sec, handle_simple_irq() will
mask() the interrupt in the special case that an interrupt is already in
the processes of being handled.. handle_simple_irq() also unmasks when
it finishes handling an interrupt (something real time adds for some
reason) ..
In terms of threading the irq everything is the same except there is no
unmask() call when the thread finishes ..
Daniel
next prev parent reply other threads:[~2007-11-28 20:53 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-26 13:31 Remy Bohmer
2007-11-26 13:45 ` Remy Bohmer
2007-11-27 15:11 ` Steven Rostedt
2007-11-27 15:25 ` Daniel Walker
2007-11-27 15:53 ` Daniel Walker
2007-11-28 14:38 ` Remy Bohmer
2007-11-28 15:36 ` Daniel Walker
2007-11-28 17:25 ` Russell King - ARM Linux
2007-11-28 19:04 ` Steven Rostedt
2007-11-28 20:05 ` Russell King - ARM Linux
2007-11-28 20:16 ` Steven Rostedt
2007-11-28 20:44 ` Daniel Walker [this message]
2007-11-28 21:13 ` Steven Rostedt
2007-11-28 23:03 ` Russell King - ARM Linux
2007-11-28 23:19 ` Daniel Walker
2007-11-29 9:04 ` Russell King - ARM Linux
2007-11-29 10:14 ` Remy Bohmer
2007-11-29 10:25 ` Russell King - ARM Linux
2007-11-29 11:27 ` Remy Bohmer
2007-11-29 13:36 ` Russell King - ARM Linux
2007-11-29 13:57 ` Steven Rostedt
2007-11-29 14:18 ` Remy Bohmer
2007-11-29 14:29 ` Russell King - ARM Linux
2007-11-29 15:33 ` Remy Bohmer
2007-11-29 16:20 ` Remy Bohmer
2007-11-29 16:30 ` Steven Rostedt
2007-11-30 21:44 ` Thomas Gleixner
2007-12-12 19:40 ` [PATCH RT] Revert Softdisable for simple irqs Steven Rostedt
2007-12-12 19:46 ` Russell King
2007-12-12 20:05 ` Remy Bohmer
2007-12-12 20:27 ` Steven Rostedt
2007-12-12 21:38 ` Remy Bohmer
[not found] ` <87bq9fqpoi.fsf@vence.hilman.org>
2007-11-28 14:43 ` [PATCH PREEMPT_RT]: On AT91 ARM: GPIO Interrupt handling can/will stall forever Remy Bohmer
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