Hi,
On Tuesday, 6 March 2007 11:32, Vivek Goyal wrote:
> Hi,
>
> I see following BUG() on serial console while hibernating on a x86_64
> machine. I am using 2.6.21-rc2 kernel.
I see it too.
> BUG: at arch/x86_64/kernel/acpi/sleep.c:70 init_low_mapping()
>
> Call Trace:
> [<ffffffff80214b9a>] acpi_save_state_mem+0x70/0xd6
> [<ffffffff8036e90e>] acpi_pm_enter+0x23/0xc1
> [<ffffffff8024eec4>] pm_suspend_disk+0x1ac/0x228
> [<ffffffff8024dc9b>] enter_state+0x50/0x1e6
> [<ffffffff8036ecce>] acpi_system_write_sleep+0x5c/0x79
> [<ffffffff8027b767>] vfs_write+0xad/0x136
> [<ffffffff8027bca4>] sys_write+0x45/0x6e
> [<ffffffff80209bbe>] system_call+0x7e/0x83
Hm, it doesn't like the fact that nonboot CPUs are online at that point, but
we don't do anything to disable them. Should we?
I think the appended patch might work.
Rafael
---
kernel/power/disk.c | 1 +
kernel/power/user.c | 1 +
2 files changed, 2 insertions(+)
Index: linux-2.6.21-rc2/kernel/power/disk.c
===================================================================
--- linux-2.6.21-rc2.orig/kernel/power/disk.c
+++ linux-2.6.21-rc2/kernel/power/disk.c
@@ -61,6 +61,7 @@ static void power_down(suspend_disk_meth
switch(mode) {
case PM_DISK_PLATFORM:
if (pm_ops && pm_ops->enter) {
+ disable_nonboot_cpus();
kernel_shutdown_prepare(SYSTEM_SUSPEND_DISK);
pm_ops->enter(PM_SUSPEND_DISK);
break;
Index: linux-2.6.21-rc2/kernel/power/user.c
===================================================================
--- linux-2.6.21-rc2.orig/kernel/power/user.c
+++ linux-2.6.21-rc2/kernel/power/user.c
@@ -398,6 +398,7 @@ static int snapshot_ioctl(struct inode *
case PMOPS_ENTER:
if (data->platform_suspend) {
+ disable_nonboot_cpus();
kernel_shutdown_prepare(SYSTEM_SUSPEND_DISK);
error = pm_ops->enter(PM_SUSPEND_DISK);
error = 0;
-
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