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Age	Commit message (Collapse)	Author
2009-01-18	softlockup: fix potential race in hung_task when resetting timeout	Mandeep Singh Baines
	Impact: fix potential false panic A potential race exists if sysctl_hung_task_timeout_secs is reset to 0 while inside check_hung_uniterruptible_tasks(). If check_task() is entered, a comparison with 0 will result in a false hung_task being detected. If sysctl_hung_task_panic is set, the system will panic. Signed-off-by: Mandeep Singh Baines <msb@google.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-16	softlockup: decouple hung tasks check from softlockup detection	Mandeep Singh Baines
	Decoupling allows: * hung tasks check to happen at very low priority * hung tasks check and softlockup to be enabled/disabled independently at compile and/or run-time * individual panic settings to be enabled disabled independently at compile and/or run-time * softlockup threshold to be reduced without increasing hung tasks poll frequency (hung task check is expensive relative to softlock watchdog) * hung task check to be zero over-head when disabled at run-time Signed-off-by: Mandeep Singh Baines <msb@google.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>