---

yaml --- r: 80253 b: refs/heads/master c: c2b84b3 h: refs/heads/master i: 80251: 257062b v: v3
git-mirror · Jan 30, 2008 · 29119d3 · 29119d3
1 parent ddcddce
commit 29119d3
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Showing 3 changed files with 26 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 387faedb1dee2e917811acd05902cc36142a4850
+refs/heads/master: c2b84b30b8c8bbccf4d2e32f8a3a70ad09ba9ab8
diff --git a/trunk/arch/x86/kernel/apic_32.c b/trunk/arch/x86/kernel/apic_32.c
@@ -470,6 +470,19 @@ void __init setup_boot_APIC_clock(void)
 
 	local_apic_timer_verify_ok = 1;
 
+	/*
+	 * Do a sanity check on the APIC calibration result
+	 */
+	if (calibration_result < (1000000 / HZ)) {
+		local_irq_enable();
+		printk(KERN_WARNING
+		       "APIC frequency too slow, disabling apic timer\n");
+		/* No broadcast on UP ! */
+		if (num_possible_cpus() > 1)
+			setup_APIC_timer();
+		return;
+	}
+
 	/* We trust the pm timer based calibration */
 	if (!pm_referenced) {
 		apic_printk(APIC_VERBOSE, "... verify APIC timer\n");

diff --git a/trunk/arch/x86/kernel/apic_64.c b/trunk/arch/x86/kernel/apic_64.c
@@ -383,6 +383,18 @@ void __init setup_boot_APIC_clock(void)
 	printk(KERN_INFO "Using local APIC timer interrupts.\n");
 	calibrate_APIC_clock();
 
+	/*
+	 * Do a sanity check on the APIC calibration result
+	 */
+	if (calibration_result < (1000000 / HZ)) {
+		printk(KERN_WARNING
+		       "APIC frequency too slow, disabling apic timer\n");
+		/* No broadcast on UP ! */
+		if (num_possible_cpus() > 1)
+			setup_APIC_timer();
+		return;
+	}
+
 	/*
 	 * If nmi_watchdog is set to IO_APIC, we need the
 	 * PIT/HPET going.  Otherwise register lapic as a dummy