Hi Vipul,
On Fri, Nov 29, 2013 at 5:58 AM, Vipul Jain wrote:
> Hi Kernel alias,
>
> I am a newbie and I am trying to figure out ways where in I can recover the
> Linux in below two scenarios:
> 1. my specific process hangs.
> 2. kernel gets hung partially or completely.
>
> I have done some readi
Thanks your replies! I found the target.
2013/12/5 上午9:34 於 "Peter Teoh" 寫道：
> yes, exactly - what u are describing is called "kdb". don't mixed up
> with "kgdb".
>
>
> kdb: this is debugging on the same computer - so no serial ports
> connection are needed. once exception occurred, you wi
On Thu, Dec 5, 2013 at 10:19 AM, Rajat Sharma wrote:
> Although /dev/watchdog is available in usermode, but nothing should stop
> you to write to it from a kernel thread.
>
> Rajat
>
I don't think /dev/watchdog (literally, I meant) is available in the
kernel. It is accessible in userspace, but
Although /dev/watchdog is available in usermode, but nothing should stop
you to write to it from a kernel thread.
Rajat
On Wed, Dec 4, 2013 at 5:50 PM, Peter Teoh wrote:
>
>
>
> On Thu, Dec 5, 2013 at 9:06 AM, Vipul Jain wrote:
>
>>
>>
>>
>> On Wed, Dec 4, 2013 at 4:57 PM, wrote:
>>
>>> On W
On Thu, Dec 5, 2013 at 9:06 AM, Vipul Jain wrote:
>
>
>
> On Wed, Dec 4, 2013 at 4:57 PM, wrote:
>
>> On Wed, 04 Dec 2013 16:45:44 -0800, Vipul Jain said:
>>
>> > If you don't mind can you please provide me more insight as what can be
>> > false alarm I can encounter to move pet inside kernel mo
On Thu, Dec 5, 2013 at 8:45 AM, Vipul Jain wrote:
>
>
>
> On Tue, Dec 3, 2013 at 10:28 PM, Peter Teoh wrote:
>
>> 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: user
yes, exactly - what u are describing is called "kdb". don't mixed up with
"kgdb".
kdb: this is debugging on the same computer - so no serial ports
connection are needed. once exception occurred, you will be popped into a
special debugger screen. problem is that now this debugger is runnin
On Wed, Dec 4, 2013 at 4:57 PM, wrote:
> On Wed, 04 Dec 2013 16:45:44 -0800, Vipul Jain said:
>
> > If you don't mind can you please provide me more insight as what can be
> > false alarm I can encounter to move pet inside kernel module?
>
> The issue isn't false alarms - it's failure to alarm wh
On Wed, 04 Dec 2013 16:45:44 -0800, Vipul Jain said:
> If you don't mind can you please provide me more insight as what can be
> false alarm I can encounter to move pet inside kernel module?
The issue isn't false alarms - it's failure to alarm when it should.
The problem is that it's possible fo
On Tue, Dec 3, 2013 at 10:28 PM, Peter Teoh wrote:
> 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
> i
On Tue, Dec 3, 2013 at 4:20 PM, Bernd Petrovitsch
wrote:
> 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 candidat
On 04-12-2013 10:17:23, valdis.kletni...@vt.edu wrote:
> On Wed, 04 Dec 2013 16:08:52 +0100, Matthias Beyer said:
>
> > > > How to test my code beside compiling it? Do I even have a possibility
> > > > to test it or should I just send it to you?
>
> If at all possible, you should cross-compile fo
wrote:
I have my implementation of socket APIs,
I sock_unregister(AF_INET); & sock_register(&inet_family_ops), this
replaces
kernel resident socket related calls with my socket related calls. My code
is loaded as kernel module.
My question, is Linux kernel
Thanks Peter for your explanation. But in fact, I am not going to touch
transport layer. The work shall be done inside the call stack of ip_rcv().
In ip layer, there is no specific process information, so the process
assignment shouldn't be a problem.
At the application layer, each application ma
On Wed, Dec 4, 2013 at 7:49 PM, Peter Teoh wrote:
>
>
>
> On Mon, Dec 2, 2013 at 1:48 PM, Guibin(Bill) Tian wrote:
>
>> Hi there,
>> Right now, I am trying to do such a thing.
>>
>> If a computer has multiple interface A and B, assume the packet is from
>> device A.
>> At ip layer, before the pac
On Wed, 04 Dec 2013 16:08:52 +0100, Matthias Beyer said:
> > > How to test my code beside compiling it? Do I even have a possibility
> > > to test it or should I just send it to you?
If at all possible, you should cross-compile for an appropriate architecture
and actually boot and test the code i
Hi kernelnewbies!
As I do not get any answer from the other MLs, this goes here, too.
Maybe there is just too much noise in lkml... never mind!
On 03-12-2013 16:57:08, Matthias Beyer wrote:
> Hi,
>
> Greg-KHs email bot tells me to send this message to a ML. It suggests
> to send it to this list
On Mon, Dec 2, 2013 at 1:48 PM, Guibin(Bill) Tian wrote:
> Hi there,
> Right now, I am trying to do such a thing.
>
> If a computer has multiple interface A and B, assume the packet is from
> device A.
> At ip layer, before the packet is transmitted to transport layer, I change
> the source addre
> Whats the error?
>
Hi Anil
>> Please do not top post.
>> For your error , please verify if
>> /lib/modules/2.6.32-220.el6.x86_64/build is really linking to the folder
>> containing the kernel files.
>>
>> Regards
>> Sudip
>>
>>
> Thats the issue the link is not there how to create the li
Ker
On Dec 4, 2013 3:42 PM, "Sudip Mukherjee"
wrote:
>
> On Wed, Dec 4, 2013 at 2:14 PM, Anil Joshi wrote:
>>
>> Thanks
>> i did that now i am getting this error
>> make
>> make-C /lib/modules/2.6.32-220.el6.x86_64/build M=/root/Desktop/exp1
modules
>> make: *** /lib/modules/2.6.32-220.el6.x
On Wed, Dec 4, 2013 at 2:14 PM, Anil Joshi wrote:
> Thanks
> i did that now i am getting this error
> make
> make-C /lib/modules/2.6.32-220.el6.x86_64/build M=/root/Desktop/exp1
> modules
> make: *** /lib/modules/2.6.32-220.el6.x86_64/build: No such file or
> directory. Stop.
>
>
>
>
> On W
Thanks
i did that now i am getting this error
make
make-C /lib/modules/2.6.32-220.el6.x86_64/build M=/root/Desktop/exp1
modules
make: *** /lib/modules/2.6.32-220.el6.x86_64/build: No such file or
directory. Stop.
On Wed, Dec 4, 2013 at 2:13 PM, Robert Clove wrote:
> Add a tab after obj-
Add a tab after obj-m (tab) :=abc.o and after make too
On Wed, Dec 4, 2013 at 2:04 PM, Anil Joshi wrote:
> Hi All,
>
> I have an make file like this
>
> obj-m := abc.o
>
> all:
> make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
>
> clean:
> make -C /lib/modules/$(sh
Hi All,
I have an make file like this
obj-m := abc.o
all:
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
clean:
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
when i do the make i am getting this error
*make: Nothing to be done for `all'.*
*I
On Wed, Dec 4, 2013 at 4:13 PM, Mandeep Sandhu
wrote:
> > assuming one mother process is monitoring 10 child process, so inside
> each
> > child process, simply just setup a PERIODIC (eg, per 5 sec) mechanism to
> > toggle a binary variables through IPC means. It will be reset when the
> > mothe
You could also look at using existing s/w for monitoring processes like monit.
I don't know your exact usecase but you could make your process as a
'service' and have something like systemd or upstart monitor it. These
tools will typically 'restart' the hung process on detection.
-mandeep
On Fr
> assuming one mother process is monitoring 10 child process, so inside each
> child process, simply just setup a PERIODIC (eg, per 5 sec) mechanism to
> toggle a binary variables through IPC means. It will be reset when the
> mother process go around checking all the variable status and, if not
On Fri, Nov 29, 2013 at 8:28 AM, Vipul Jain wrote:
> Hi Kernel alias,
>
> I am a newbie and I am trying to figure out ways where in I can recover the
> Linux in below two scenarios:
> 1. my specific process hangs.
>
how to recover i cannot tell you, because it is application specific (but
best i
On Wed, Dec 4, 2013 at 3:19 AM, Abu Rasheda wrote:
> On Mon, Dec 2, 2013 at 11:31 PM, Mulyadi Santosa
> wrote:
>> On Tue, Dec 3, 2013 at 8:33 AM, Abu Rasheda wrote:
>>> I have my implementation of socket APIs,
>>>
>>> I sock_unregister(AF_INET); & sock_register(&inet_family_ops), this replaces
>
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