Re: nmi_watchdog=2 regression in 2.6.21

[Daniel Walker]

Here's a simpler patch that fixes the boot hang ..

We have to call off the IPI looping regardless of the check_nmi_watchdog
outcome..

Signed-off-by: Daniel Walker <dwalker@xxxxxxxxxx>

Index: linux-2.6.22/arch/i386/kernel/nmi.c
===================================================================
--- linux-2.6.22.orig/arch/i386/kernel/nmi.c	2007-08-15 00:51:12.000000000 +0000
+++ linux-2.6.22/arch/i386/kernel/nmi.c	2007-08-28 20:27:56.000000000 +0000
@@ -122,12 +122,12 @@ static int __init check_nmi_watchdog(voi
 			atomic_dec(&nmi_active);
 		}
 	}
+	endflag = 1;
 	if (!atomic_read(&nmi_active)) {
 		kfree(prev_nmi_count);
 		atomic_set(&nmi_active, -1);
 		return -1;
 	}
-	endflag = 1;
 	printk("OK.\n");
 
 	/* now that we know it works we can reduce NMI frequency to




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