Re: [patch] i386: halt the CPU on serious errors

[Dave Jones]

On Tue, Jun 20, 2006 at 12:55:25AM -0400, Chuck Ebbert wrote:
 
 > --- 2.6.17-32.orig/arch/i386/kernel/crash.c
 > +++ 2.6.17-32/arch/i386/kernel/crash.c
 > @@ -113,8 +113,8 @@ static int crash_nmi_callback(struct pt_
 >  	disable_local_APIC();
 >  	atomic_dec(&waiting_for_crash_ipi);
 >  	/* Assume hlt works */
 > -	halt();
 > -	for(;;);
 > +	for (;;)
 > +		halt();
 >  
 >  	return 1;

But we should never get past that first halt(), as interrupts are disabled.

 > --- 2.6.17-32.orig/arch/i386/kernel/doublefault.c
 > +++ 2.6.17-32/arch/i386/kernel/doublefault.c
 > @@ -44,7 +44,8 @@ static void doublefault_fn(void)
 >  		}
 >  	}
 >  
 > -	for (;;) /* nothing */;
 > +	for (;;)
 > +		halt();
 >  }

This one would probably be better off as a cpu_relax()

		Dave

-- 
http://www.codemonkey.org.uk
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