Hi Vipul,
I have seen this in a number of commercial software running on RHEL, and on
other realtime OS as well. The watchdog mechanism is always working in
pair: userspace "feeding" the dog (in the kernel). (btw, feed the dog
is a more usually used term than "pet" the dog. sorry for that.
On Tue, Dec 3, 2013 at 2:31 PM, wrote:
> On Tue, 03 Dec 2013 13:15:32 -0800, Vipul Jain said:
>
> > currently we configure/pet the watchdog from user space via /dev/ipmi0
> > device interface and I would like to do the pet part from kernel module.
>
> That's actually defeating the purpose. If yo
On Tue, 03 Dec 2013 13:15:32 -0800, Vipul Jain said:
> currently we configure/pet the watchdog from user space via /dev/ipmi0
> device interface and I would like to do the pet part from kernel module.
That's actually defeating the purpose. If you do it from the kernel,
you keep the watchdog from
On Mon, Dec 2, 2013 at 11:32 PM, anish singh wrote:
> On Mon, Dec 2, 2013 at 10:34 PM, Vipul Jain wrote:
> > Hi,
> >
> > I would like to move the hardware watchdog pet code from user space to
> > kernel space inside the ipmi module and would like to know how to go
> about
> > pet the hardware wat
On Die, 2013-12-03 at 08:38 -0500, valdis.kletni...@vt.edu wrote:
> On Tue, 03 Dec 2013 20:35:41 +0800, said:
> > For debugging purpose, I want something like 'getchar()' that can pause
> > execution in the module code. Do any candidates I can choose?
You do not want that - there is way too much
On Tue, 03 Dec 2013 20:35:41 +0800, ä¹å®å¨ said:
> For debugging purpose, I want something like 'getchar()' that can pause
> execution in the module code. Do any candidates I can choose?
The problem is that pausing execution in module code is dangerous, as if
you hold any locks or anything lik
On Tue, Dec 3, 2013 at 2:35 PM, 乃宏周 wrote:
> For debugging purpose, I want something like 'getchar()' that can pause
> execution in the module code. Do any candidates I can choose?
No.
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For debugging purpose, I want something like 'getchar()' that can pause
execution in the module code. Do any candidates I can choose?
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> echo $? show 1 (EPERM? most probably, operation not permitted for common
> module).
>
Hmmm...strange. What does 'dmesg' show when this happens? Is anything
related to an error printed there?
-mandeep
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On Tue, Dec 3, 2013 at 2:17 PM, Mandeep Sandhu
wrote:
> >
> > error = system("modprobe -rv A");
> >
> > This returns an error = 256.
>
> Hi Mandeep,
thanks for your mail
What does 'perror' show (if anything) ?
>
> Also, if you try the same via a shel, whats the return value ('echo
> $?') printe
>
> error = system("modprobe -rv A");
>
> This returns an error = 256.
What does 'perror' show (if anything) ?
Also, if you try the same via a shel, whats the return value ('echo
$?') printed?
BTW, why are you using the '-v' option when invoking modprobe programatically?
-mandeep
Hi,
I am getting an error while unloading modules via modprobe. Here is the
description of issue.
I have a module 'A' that depends on Module 'C' and 'D'.
And another module 'B' that depends on Module 'C' and 'E'
I loaded these modules from code via 'system' function as
error = system("modprobe
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