Currently system always reboot after below message when execute "kexec -e". [ 0.572119] smpboot: Booting Node 0, Processors # 1 OK In commit 1b3a5d02ee070c8f9943333b9b6370f486601e0f, reboot= handling was moved to kerne/reboot.c. However, the code to migrate current thread to reboot cpu was removed. That cause this incorrect kexec behavior. Now add that code block back. Reported-by: Matthew Whitehead <mwhitehe at redhat.com> Reported-by: Dave Young <dyoung at redhat.com> Tested-by: WANG Chao <chaowang at redhat.com> Signed-off-by: Baoquan He <bhe at redhat.com> --- arch/x86/kernel/reboot.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c index 7e920bf..3049de9 100644 --- a/arch/x86/kernel/reboot.c +++ b/arch/x86/kernel/reboot.c @@ -551,6 +551,21 @@ void native_machine_shutdown(void) { /* Stop the cpus and apics */ #ifdef CONFIG_SMP + /* The boot cpu is always logical cpu 0 */ + int reboot_cpu_id = 0; + + /* See if there has been given a command line override */ + if ((reboot_cpu != -1) && (reboot_cpu < nr_cpu_ids) && + cpu_online(reboot_cpu)) + reboot_cpu_id = reboot_cpu; + + /* Make certain the cpu I'm about to reboot on is online */ + if (!cpu_online(reboot_cpu_id)) + reboot_cpu_id = smp_processor_id(); + + /* Make certain I only run on the appropriate processor */ + set_cpus_allowed_ptr(current, cpumask_of(reboot_cpu_id)); + /* * Stop all of the others. Also disable the local irq to * not receive the per-cpu timer interrupt which may trigger -- 1.8.3.1