From: 杨波 <struggle@mail.nankai.edu.cn>
To: linux-kernel@vger.kernel.org
Subject: sleep for ever ?
Date: Wed, 06 Sep 2006 22:07:59 +0800 [thread overview]
Message-ID: <357551904.04167@mail.nankai.edu.cn> (raw)
Message-ID: <44FED63F.2090204@mail.nankai.edu.cn> (raw)
Hi ,
Take a look at following code :
DECLARE_WAITQUEUE(wait, current);
add_wait_queue(q, &wait);
while (!condition) {
/* if there is an interrupt here , and the interrupt
is just the one the sleeping process wait
for , is this process sleep for the interrupt
for ever ?*/
set_current_state(TASK_INTERRUPTIBLE);
if (signal_pending(current))
/* handle signal */
schedule();
}
set_current_state(TASK_RUNNING);
remove_wait_queue(q, &wait);
Suppose the process just want to sleep for an hardware
event , but before the set_current_state() call , the event
come , is the process sleep for ever ?
next reply other threads:[~2006-09-06 15:34 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <44FED63F.2090204@mail.nankai.edu.cn>
2006-09-06 14:07 ` 杨波 [this message]
[not found] <44FED695.9030501@mail.nankai.edu.cn>
2006-09-06 14:09 ` 杨波
[not found] <44FED70F.6080208@mail.nankai.edu.cn>
2006-09-06 14:11 ` Bo Yang
2006-09-07 10:01 ` Tejun Heo
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