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From: liyu <liyu@ccoss.com.cn>
To: LKML <linux-kernel@vger.kernel.org>
Subject: [Question] one question about 'current' in scheduler_tick()
Date: Mon, 17 Oct 2005 16:05:09 +0800	[thread overview]
Message-ID: <43535B35.5020603@ccoss.com.cn> (raw)

Hi, All.

    I found scheduler_tick() use current macro to get task_struct of 
current task.
   
    I seen scheduler_tick() is called every timer interrupt at most 
time. In this
case, I think scheduler_tick() is in interrupt context (enter kernel by 
interrupt),
So I have a hunch that there have not thread_info which it need in 
kernel stack. But
It seem it can work perfectly.
 
    I can not understand this. Would any expert like explain clearly for 
it ?

    Thanks in advanced.

-liyu



   

             reply	other threads:[~2005-10-17  8:04 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-10-17  8:05 liyu [this message]
2005-10-17  8:24 ` [Question] one question about 'current' in scheduler_tick() Steven Rostedt
2005-10-17  9:02   ` liyu
2005-10-17  9:32     ` Steven Rostedt
2005-10-18  1:58       ` liyu

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