On Mon, 18 Dec 2006 20:34:43 -0600
Robert Hancock <[email protected]> wrote:
> kyle wrote:
> > Hi,
> >
> > Recently my mysql servershows something like:
> > Dec 18 18:24:05 sql kernel: schedule_timeout: wrong timeout value
> > ffffffff from c0284efd
> > Dec 18 18:24:36 sql last message repeated 19939 times
> > Dec 18 18:25:37 sql last message repeated 33392 times
> >
> > from syslog every 1 or 2 days. Whenever the messages show, mysql server
> > stop accept new connections from the same network, and I need to restart
> > the mysql service and then it will keep running well for 1-2 days until
> > the messages show up again.
> >
> > The server has been running over 1 year without any problem, the problem
> > started show up around 2 weeks ago. It's running kernel 2.6.12, and
> > mysql server, nothing else. Hardware is Pentium 4 2.8GHz with
> > hyperthreading enabled.
> >
> > What does the kernel message mean and why it make mysql stop accept new
> > connections? Is it hardware problem or try upgrade the kernel may help?
> > Please CC me if possible. Thank you
>
> The message means some code in the kernel or in some module passed a
> negative value to schedule_timeout which it shouldn't have. The c0284efd
> value is the address of the function that made the call - you may be
> able to look that up in your /proc/ksyms or the System.map file and
> figure out what function that is..
>
I queued this:
From: Andrew Morton <[email protected]>
Kyle is hitting this warning, and we don't have a clue what it's caused by.
Add the obligatory dump_stack().
Cc: kyle <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---
kernel/timer.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff -puN kernel/timer.c~schedule_timeout-improve-warning-message kernel/timer.c
--- a/kernel/timer.c~schedule_timeout-improve-warning-message
+++ a/kernel/timer.c
@@ -1344,11 +1344,10 @@ fastcall signed long __sched schedule_ti
* should never happens anyway). You just have the printk()
* that will tell you if something is gone wrong and where.
*/
- if (timeout < 0)
- {
+ if (timeout < 0) {
printk(KERN_ERR "schedule_timeout: wrong timeout "
- "value %lx from %p\n", timeout,
- __builtin_return_address(0));
+ "value %lx\n", timeout);
+ dump_stack();
current->state = TASK_RUNNING;
goto out;
}
_
-
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