interruptible sleep tasks

Hi All, During kernel drivers testing I see lot of user mode applications blocks forever in interruptible sleep mode. Is there any way to get the corresponding kernel functions stack trace ? I see kernel has “hung_task_timeout_secs” parameter and when a task in D state did not get scheduled for more than this value report a warning. Similarly is it possible to get a warning or kernel functions stack trace when a task in “S - interruptible sleep mode” and did not get scheduled for certain duration? -- Thanks, Sekhar