linux-kernel - Re: [PATCH] lib/spinlock_debug: avoid one thread can not obtain the spinlock for a long time.

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Date:	Wed, 30 Apr 2014 08:06:25 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	"Wang, Xiaoming" <xiaoming.wang@...el.com>
Cc:	mingo@...hat.com, linux-kernel@...r.kernel.org,
	chuansheng.liu@...el.com
Subject: Re: [PATCH] lib/spinlock_debug: avoid one thread can not obtain the
 spinlock for a long time.

On Wed, Apr 30, 2014 at 01:04:31PM -0400, Wang, Xiaoming wrote:
> loops_per_jiffy is larger than expectation that possible
> causes one thread can not obtain the spin lock for a long time.
> So use cpu_clock() to reach timeout in one second which can
> avoid HARD LOCKUP.

This is just not making sense.. one thing is broken so then you tape on
another? Fix the first already.

Also, why do you care?
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