diff options
| author | Mark Lord <lkml@rtr.ca> | 2007-10-01 01:20:10 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-01 07:52:23 -0700 |
| commit | 4047727e5ae33f9b8d2b7766d1994ea6e5ec2991 (patch) | |
| tree | 70486b4524e672d800c2fbf36d06c73306efacf6 /kernel/sys.c | |
| parent | 281e0e3b34acb76a157576d27abc85c09fcf78e3 (diff) | |
| download | lwn-4047727e5ae33f9b8d2b7766d1994ea6e5ec2991.tar.gz lwn-4047727e5ae33f9b8d2b7766d1994ea6e5ec2991.zip | |
Fix SMP poweroff hangs
We need to disable all CPUs other than the boot CPU (usually 0) before
attempting to power-off modern SMP machines. This fixes the
hang-on-poweroff issue on my MythTV SMP box, and also on Thomas Gleixner's
new toybox.
Signed-off-by: Mark Lord <mlord@pobox.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/sys.c')
| -rw-r--r-- | kernel/sys.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/sys.c b/kernel/sys.c index 1b33b05d346b..8ae2e636eb1b 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -32,6 +32,7 @@ #include <linux/getcpu.h> #include <linux/task_io_accounting_ops.h> #include <linux/seccomp.h> +#include <linux/cpu.h> #include <linux/compat.h> #include <linux/syscalls.h> @@ -878,6 +879,7 @@ void kernel_power_off(void) kernel_shutdown_prepare(SYSTEM_POWER_OFF); if (pm_power_off_prepare) pm_power_off_prepare(); + disable_nonboot_cpus(); sysdev_shutdown(); printk(KERN_EMERG "Power down.\n"); machine_power_off(); |