From: Steven Rostedt <rostedt@goodmis.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>,
LKML <linux-kernel@vger.kernel.org>,
RT <linux-rt-users@vger.kernel.org>
Subject: [PATCH RT] Use raw spinlocks in NMI print sequencing.
Date: Tue, 19 Jun 2007 16:11:34 -0400 [thread overview]
Message-ID: <1182283894.15228.23.camel@localhost.localdomain> (raw)
Currently NMI uses spinlocks to serialize the prints. We need these to
be raw spinlocks for PREEMPT_RT
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Index: linux-2.6.21-rt9/arch/x86_64/kernel/nmi.c
===================================================================
--- linux-2.6.21-rt9.orig/arch/x86_64/kernel/nmi.c
+++ linux-2.6.21-rt9/arch/x86_64/kernel/nmi.c
@@ -949,7 +949,7 @@ int __kprobes nmi_watchdog_tick(struct p
}
if (cpu_isset(cpu, backtrace_mask)) {
- static DEFINE_SPINLOCK(lock); /* Serialise the printks */
+ static DEFINE_RAW_SPINLOCK(lock); /* Serialise the printks */
spin_lock(&lock);
printk("NMI backtrace for cpu %d\n", cpu);
reply other threads:[~2007-06-19 20:12 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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