linux-kernel - [PATCH RT] Don't allow non-threaded softirqs and threaded hardirqs

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Message-ID: <Pine.LNX.4.58.0706281844120.28911@gandalf.stny.rr.com>
Date:	Thu, 28 Jun 2007 18:46:52 -0400 (EDT)
From:	Steven Rostedt <rostedt@...dmis.org>
To:	LKML <linux-kernel@...r.kernel.org>
cc:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH RT] Don't allow non-threaded softirqs and threaded hardirqs


Ingo,

I think this was sent before, and it did cause problems before. Would
there be *any* reason to have non-threaded softirqs but threaded hardirqs.
I can see lots of issues with that.

This patch has selecting hardirqs also select softirqs as threads.

Signed-off-by: Steven Rostedt <rostedt@...dmis.org>

Index: linux-2.6.21.5-rt18/kernel/Kconfig.preempt
===================================================================
--- linux-2.6.21.5-rt18.orig/kernel/Kconfig.preempt	2007-06-28 16:58:49.000000000 -0400
+++ linux-2.6.21.5-rt18/kernel/Kconfig.preempt	2007-06-28 17:00:07.000000000 -0400
@@ -106,6 +106,7 @@ config PREEMPT_HARDIRQS
 	bool "Thread Hardirqs"
 	default n
 	depends on !GENERIC_HARDIRQS_NO__DO_IRQ
+	select PREEMPT_SOFTIRQS
 	help
 	  This option reduces the latency of the kernel by 'threading'
           hardirqs. This means that all (or selected) hardirqs will run
-
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