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Hi, I
am using 2.6.27.18 kernel.My machine is powerpc architecture.I executed the
deep sleep operation by executing the following command: “echo mem > /sys/power/state” The suspend opeartion was successful.All the devices and
user level threads are suspended. But sometimes during resume my machine hangs.This is not
happening regularly.But it occurs after 60 or 70 times of deep sleep
operation.So for debugging this I have added checkpoints in the flow of deep
check.When this issue was produced the kernel hangs around “thaw_tasks”
or “schedule” function of “thaw_processes”.These
functions are defined in “kernel/power/process.c”. Note: The final printk message “Restarting
tasks.....done” was not displayed when this issue occurred.But all the
devices and drivers resumed back. I was not able to debug this as the reproduciablity rate was
too low.Kindly help me in solving the issue. Regards, Purusothaman R Please do not print this email unless it is absolutely necessary. The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com |
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