From: "Alexey Shinkin" <alexshinkin@hotmail.com>
To: linux-kernel@vger.kernel.org
Subject: questions on wait_event ...
Date: Fri, 23 Dec 2005 06:04:33 +0600 [thread overview]
Message-ID: <BAY16-F62AE23D265EDA3F940115AF330@phx.gbl> (raw)
Hi , all !
Could anyone please clarify one thing in that old well known
wait_event_... code (taken from 2.6.5 wait.h ):
#define __wait_event_interruptible(wq, condition, ret) \
do { \
wait_queue_t __wait; \
init_waitqueue_entry(&__wait, current); \
\
add_wait_queue(&wq, &__wait); \
for (;;) { \
set_current_state(TASK_INTERRUPTIBLE); \
if (condition) \
break;
........................................
Is it possible that scheduling happen after set_current_state() but before
checking the condition ?
If yes - even if we will have condition==TRUE by this moment - the scheduler
will make the process to sleep anyway , right ?
Regards
Alex Shinkin
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next reply other threads:[~2005-12-23 0:04 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-23 0:04 Alexey Shinkin [this message]
[not found] <5mIFB-6PS-33@gated-at.bofh.it>
2005-12-23 0:16 ` Robert Hancock
2005-12-23 0:51 ` Alexey Shinkin
2005-12-23 1:10 ` Steven Rostedt
2005-12-23 1:46 ` Alexey Shinkin
2005-12-23 20:48 ` Steven Rostedt
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