From 5a52dd50091b6a6e710a1293db741028f8cc5aac Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Fri, 25 Jan 2008 21:08:32 +0100 Subject: [PATCH] sched: rt-watchdog: fix .rlim_max = RLIM_INFINITY Remove the curious logic to set it_sched_expires in the future. It useless because rt.timeout wouldn't be incremented anyway. Explicity check for RLIM_INFINITY as a test programm that had a 1s soft limit and a inf hard limit would SIGKILL at 1s. This is because RLIM_INFINITY+d-1 is d-2. Signed-off-by: Peter Zijlsta CC: Michal Schmidt Signed-off-by: Ingo Molnar --- kernel/posix-cpu-timers.c | 3 ++- kernel/sched_rt.c | 8 +------- 2 files changed, 3 insertions(+), 8 deletions(-) diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c index 2c076b36c4f..0b7c82ac467 100644 --- a/kernel/posix-cpu-timers.c +++ b/kernel/posix-cpu-timers.c @@ -1020,7 +1020,8 @@ static void check_thread_timers(struct task_struct *tsk, unsigned long hard = sig->rlim[RLIMIT_RTTIME].rlim_max; unsigned long *soft = &sig->rlim[RLIMIT_RTTIME].rlim_cur; - if (tsk->rt.timeout > DIV_ROUND_UP(hard, USEC_PER_SEC/HZ)) { + if (hard != RLIM_INFINITY && + tsk->rt.timeout > DIV_ROUND_UP(hard, USEC_PER_SEC/HZ)) { /* * At the hard limit, we just die. * No need to calculate anything else now. diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c index f1f215db3bd..2dac5ebb8bc 100644 --- a/kernel/sched_rt.c +++ b/kernel/sched_rt.c @@ -1125,13 +1125,7 @@ static void watchdog(struct rq *rq, struct task_struct *p) p->rt.timeout++; next = DIV_ROUND_UP(min(soft, hard), USEC_PER_SEC/HZ); - if (next > p->rt.timeout) { - u64 next_time = p->se.sum_exec_runtime; - - next_time += next * (NSEC_PER_SEC/HZ); - if (p->it_sched_expires > next_time) - p->it_sched_expires = next_time; - } else + if (p->rt.timeout > next) p->it_sched_expires = p->se.sum_exec_runtime; } }