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softlockup: remove timestamp checking from hung_task

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Impact: saves sizeof(long) bytes per task_struct

By guaranteeing that sysctl_hung_task_timeout_secs have elapsed between
tasklist scans we can avoid using timestamps.

Signed-off-by: Mandeep Singh Baines <msb@google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Mandeep Singh Baines
2009-02-06 15:37:47 -08:00
committed by Ingo Molnar
parent 94be52dc07
commit 17406b82d6
3 changed files with 12 additions and 45 deletions
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include/linux/sched.h
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@@ -1241,7 +1241,6 @@ struct task_struct {
#endif
#ifdef CONFIG_DETECT_HUNG_TASK
/* hung task detection */
unsigned long last_switch_timestamp;
unsigned long last_switch_count;
#endif
/* CPU-specific state of this task */