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authorLiu Hua <sdu.liu@huawei.com>2014-04-07 15:38:57 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-05-06 07:51:45 -0700
commit96f6aea2715b25edfc9b982f9e372bd87db6c04e (patch)
tree36c4f98e3e0c9e2a8ac02ccfbdd320577478abc5 /fs
parentaf4acfaf3ca2f1da6e48d67e50f27f5e22fa3308 (diff)
hung_task: check the value of "sysctl_hung_task_timeout_sec"
commit 80df28476505ed4e6701c3448c63c9229a50c655 upstream. As sysctl_hung_task_timeout_sec is unsigned long, when this value is larger then LONG_MAX/HZ, the function schedule_timeout_interruptible in watchdog will return immediately without sleep and with print : schedule_timeout: wrong timeout value ffffffffffffff83 and then the funtion watchdog will call schedule_timeout_interruptible again and again. The screen will be filled with "schedule_timeout: wrong timeout value ffffffffffffff83" This patch does some check and correction in sysctl, to let the function schedule_timeout_interruptible allways get the valid parameter. Signed-off-by: Liu Hua <sdu.liu@huawei.com> Tested-by: Satoru Takeuchi <satoru.takeuchi@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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