From: Kirill Tkhai <tkhai@yandex.ru>
To: Oleg Nesterov <oleg@redhat.com>
Cc: Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Mike Galbraith <umgwanakikbuti@gmail.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/3] sched: fix the task-group check in tg_has_rt_tasks()
Date: Mon, 22 Sep 2014 10:54:05 +0400 [thread overview]
Message-ID: <1411368845.4942.2.camel@localhost.localdomain> (raw)
In-Reply-To: <20140921193336.GA28618@redhat.com>
В Вс, 21/09/2014 в 21:33 +0200, Oleg Nesterov пишет:
> tg_has_rt_tasks() wants to find an RT task in this task_group, but
> task_rq(p)->rt.tg wrongly checks the root rt_rq.
>
> Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Kirill Tkhai <ktkhai@parallels.com>
> ---
> kernel/sched/core.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/kernel/sched/core.c b/kernel/sched/core.c
> index eee12b3..9023f56 100644
> --- a/kernel/sched/core.c
> +++ b/kernel/sched/core.c
> @@ -7354,7 +7354,7 @@ static inline int tg_has_rt_tasks(struct task_group *tg)
> struct task_struct *g, *p;
>
> for_each_process_thread(g, p) {
> - if (rt_task(p) && task_rq(p)->rt.tg == tg)
> + if (rt_task(p) && task_group(p) == tg)
> return 1;
> }
>
next prev parent reply other threads:[~2014-09-22 6:54 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-21 19:33 [PATCH 0/3] sched: fix tg_has_rt_tasks(), tasklist_lock cleanups Oleg Nesterov
2014-09-21 19:33 ` [PATCH 1/3] sched: fix the task-group check in tg_has_rt_tasks() Oleg Nesterov
2014-09-22 6:54 ` Kirill Tkhai [this message]
2014-09-24 14:55 ` [tip:sched/core] sched: Fix " tip-bot for Oleg Nesterov
2014-09-21 19:33 ` [PATCH 2/3] sched: normalize_rt_tasks: don't use _irqsave for tasklist_lock, use task_rq_lock() Oleg Nesterov
2014-09-24 14:56 ` [tip:sched/core] sched: normalize_rt_tasks(): Don' t " tip-bot for Oleg Nesterov
2014-09-21 19:33 ` [PATCH 3/3] sched: print_rq: don't use tasklist_lock Oleg Nesterov
2014-09-24 14:56 ` [tip:sched/core] sched: print_rq(): Don't " tip-bot for Oleg Nesterov
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