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From: Peter Zijlstra <peterz@infradead.org>
To: Tejun Heo <tj@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>,
	linux-kernel@vger.kernel.org,
	Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [PATCH] scheduler: convert BUG_ON()s in try_to_wake_up_local() to WARN_ON_ONCE()s
Date: Tue, 19 Mar 2013 11:14:34 +0100	[thread overview]
Message-ID: <1363688074.22553.14.camel@laptop> (raw)
In-Reply-To: <20130318192234.GD3042@htj.dyndns.org>

On Mon, 2013-03-18 at 12:22 -0700, Tejun Heo wrote:
> try_to_wake_up_local() should only be invoked to wake up another task
> in the same runqueue and BUG_ON()s are used to enforce the rule.
> Missing try_to_wake_up_local() can stall workqueue execution but such
> stalls are likely to be finite either by another work item being
> queued or the one blocked getting unblocked.  There's no reason to
> trigger BUG while holding rq lock crashing the whole system.
> 
> Convert BUG_ON()s in try_to_wake_up_local() to WARN_ON_ONCE()s.

Doesn't really matter either way, the printk()s triggered by either
will very likely kill the system anyhow ;-)


  parent reply	other threads:[~2013-03-19 10:14 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-03-18 19:22 Tejun Heo
2013-03-18 19:32 ` Steven Rostedt
2013-03-19 10:14 ` Peter Zijlstra [this message]
2013-03-19 11:29   ` Steven Rostedt
2013-03-21 18:14 ` [tip:sched/urgent] sched: Convert BUG_ON() s " tip-bot for Tejun Heo

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