Messages in this thread | | | Date | Fri, 9 Jul 2021 11:46:43 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH] kernel/sched/core: Print the time when the process entered the D state |
| |
On Thu, Jul 08, 2021 at 10:05:59PM -0700, zhouchuangao wrote: > Sometimes we need to trigger /proc/sysrq-trigger to view the information > of the D state process in the system. > e.g: > echo w > /proc/sysrq-trigger > > Here we print the scheduling time of the process, which is convenient > for us to judge the state of the system and for debugging. > > Signed-off-by: zhouchuangao <zhouchuangao@vivo.com> > --- > kernel/sched/core.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/kernel/sched/core.c b/kernel/sched/core.c > index cf16f8f..e03474d 100644 > --- a/kernel/sched/core.c > +++ b/kernel/sched/core.c > @@ -8154,9 +8154,10 @@ void sched_show_task(struct task_struct *p) > if (pid_alive(p)) > ppid = task_pid_nr(rcu_dereference(p->real_parent)); > rcu_read_unlock(); > - pr_cont(" stack:%5lu pid:%5d ppid:%6d flags:0x%08lx\n", > + pr_cont(" stack:%5lu pid:%5d ppid:%6d flags:0x%08lx sched:%llu\n", > free, task_pid_nr(p), ppid, > - (unsigned long)task_thread_info(p)->flags); > + (unsigned long)task_thread_info(p)->flags, > + p->sched_info.last_arrival);
How's that not a compile fail for SCHED_INFO=n ?
| |