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Date: Fri, 22 Jun 2007 22:45:47 +0900
From: "Akinobu Mita" <akinobu.mita@gmail.com>
To: "Steven Rostedt" <rostedt@goodmis.org>
Subject: Re: [RFC PATCH 2/6] Split out tasklets from softirq.c
Cc: LKML <linux-kernel@vger.kernel.org>,
       "Linus Torvalds" <torvalds@linux-foundation.org>,
       "Ingo Molnar" <mingo@elte.hu>,
       "Andrew Morton" <akpm@linux-foundation.org>,
       "Thomas Gleixner" <tglx@linutronix.de>,
       "Christoph Hellwig" <hch@infradead.org>,
       "john stultz" <johnstul@us.ibm.com>, "Oleg Nesterov" <oleg@tv-sign.ru>,
       "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
       "Dipankar Sarma" <dipankar@in.ibm.com>,
       "David S. Miller" <davem@davemloft.net>, matthew.wilcox@hp.com,
       kuznet@ms2.inr.ac.ru
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2007/6/22, Steven Rostedt <rostedt@goodmis.org>:

> +static inline void tasklet_unlock_wait(struct tasklet_struct *t)
> +{
> +       while (test_bit(TASKLET_STATE_RUN, &(t)->state)) { barrier(); }
> +}

BTW, can we use cpu_relax() instead of barrier() in this busy-wait loop?