Fix cpu offline bug
At current xen, when cpu offline, cpu0 will wait the 1st cpu offline;
However, if offline 2nd, 3rd, ... cpu, cpu0 will not wait it.
This patch is used to fix the bug.
Signed-off-by: Liu, Jinsong <jinsong.liu@xxxxxxxxx>
diff -r d1631540bcc4 xen/arch/x86/smpboot.c
--- a/xen/arch/x86/smpboot.c Tue Jan 18 17:23:24 2011 +0000
+++ b/xen/arch/x86/smpboot.c Sat Feb 12 03:48:09 2011 +0800
@@ -78,7 +78,8 @@ static enum cpu_state {
CPU_STATE_INIT, /* master -> slave: Early bringup phase 1 */
CPU_STATE_CALLOUT, /* master -> slave: Early bringup phase 2 */
CPU_STATE_CALLIN, /* slave -> master: Completed phase 2 */
- CPU_STATE_ONLINE /* master -> slave: Go fully online now. */
+ CPU_STATE_ONLINE, /* master -> slave: Go fully online now. */
+ CPU_STATE_STAY /* after slave dead, global cpu_state stay here */
} cpu_state;
#define set_cpu_state(state) do { mb(); cpu_state = (state); } while (0)
@@ -867,6 +868,8 @@ void __cpu_die(unsigned int cpu)
if ( (++i % 10) == 0 )
printk(KERN_ERR "CPU %u still not dead...\n", cpu);
}
+
+ set_cpu_state(CPU_STATE_STAY);
}
int cpu_add(uint32_t apic_id, uint32_t acpi_id, uint32_t pxm)
cpuoffline_fix_1.bug
Description: cpuoffline_fix_1.bug
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