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authorKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>2013-05-26 17:35:41 -0400
committerFrederic Weisbecker <fweisbec@gmail.com>2013-07-04 18:02:30 +0200
commitfa18f7bde3ad4568d1d343b60d963bfbd8dc3991 (patch)
treeaa51270ce1fcc53f2547571b615a53e4e1bce464 /init
parenta0b2062b0904ef07944c4a6e4d0f88ee44f1e9f2 (diff)
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posix-cpu-timers: don't account cpu timer after stopped thread runtime accounting
When tsk->signal->cputimer->running is 1, signal->cputimer (i.e. per process timer account) and tsk->sum_sched_runtime (i.e. per thread timer account) increase at the same pace because update_curr() increases both accounting. However, there is one exception. When thread exiting, __exit_signal() turns over task's sum_shced_runtime to sig->sum_sched_runtime, but it doesn't stop signal->cputimer accounting. This inconsistency makes POSIX timer wake up too early. This patch fixes it. Original-patch-by: Olivier Langlois <olivier@trillion01.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Acked-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Olivier Langlois <olivier@trillion01.com> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
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