Messages in this thread Patch in this message | | | Date | Mon, 8 Oct 2007 11:06:33 -0700 | From | Greg KH <> | Subject | [patch 09/12] Fix SMP poweroff hangs |
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From: Mark Lord <lkml@rtr.ca>
commit 4047727e5ae33f9b8d2b7766d1994ea6e5ec2991 from upstream
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> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- kernel/sys.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/kernel/sys.c +++ b/kernel/sys.c @@ -31,6 +31,7 @@ #include <linux/cn_proc.h> #include <linux/getcpu.h> #include <linux/task_io_accounting_ops.h> +#include <linux/cpu.h> #include <linux/compat.h> #include <linux/syscalls.h> @@ -865,6 +866,7 @@ EXPORT_SYMBOL_GPL(kernel_halt); void kernel_power_off(void) { kernel_shutdown_prepare(SYSTEM_POWER_OFF); + disable_nonboot_cpus(); printk(KERN_EMERG "Power down.\n"); machine_power_off(); } -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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