From: Ingo Molnar <mingo@kernel.org>
To: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
Steven Rostedt <rostedt@goodmis.org>,
Dave Sullivan <dsulliva@redhat.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/1] hung_task debugging: Add tracepoint to report the hang
Date: Sun, 20 Oct 2013 10:48:37 +0200 [thread overview]
Message-ID: <20131020084837.GB16236@gmail.com> (raw)
In-Reply-To: <20131019161828.GA7439@redhat.com>
* Oleg Nesterov <oleg@redhat.com> wrote:
> Currently check_hung_task() prints a warning if it detects the problem,
> but it is not convenient to watch the system logs if user-space wants to
> be notified about the hang.
>
> Add the new trace_sched_process_hang() into check_hung_task(), this way
> a user-space monitor can easily wait for the hang and potentially
> resolve a problem.
I'm wondering, is the data of trace_console() in kernel/printk/printk.c
not sufficient?
If it's not enough then it might be better to add a higher level printk
tracepoint instead - that can catch hung_task messages and (much) more.
Thanks,
Ingo
next prev parent reply other threads:[~2013-10-20 8:48 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-19 16:18 [PATCH 0/1] hung_task debugging: Add tracepoint to report the hang Oleg Nesterov
2013-10-19 16:18 ` [PATCH 1/1] " Oleg Nesterov
2013-10-20 8:48 ` Ingo Molnar [this message]
2013-10-29 19:10 ` Oleg Nesterov
2013-10-31 10:53 ` [tip:core/locking] " tip-bot for Oleg Nesterov
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