On Sat, Aug 14, 2010 at 08:57:09PM +0800, Parmenides wrote:
> Hi,
>
> To acitvate a softirq, the raise_softirq() will be invorked. In this
> function, in_interruput() function is called, and if we get value 1,
> raise_softirq() will return simply. According to ULK3, this situation
> indicates eith
On Fri, Jun 18, 2010 at 10:11:13AM +0530, Prasad Joshi wrote:
> Hi All,
>
> I am trying to understand a a kernel oops report. Here are some of the
> fields from the report
>
> BUG: unable to handle kernel NULL pointer dereference at 0034
> Oops: [#1] SMP
> Pid: 6478, comm: cp Tai
On Thu, Jun 17, 2010 at 07:30:53PM +0300, Sudipta GHOSH wrote:
> Hi,
>
> Memory management , scheduling is part of core kernel.
>
> Is it a process or special code resides in RAM?
>
> As I see init process has PID 0, so the kernel code is a process or
> special code.
>
> when there is an interr
On Sat, May 08, 2010 at 09:43:23PM +0530, Onkar Mahajan wrote:
> What is trace_block_remap , I searched the entire kernel src code but
> I was not able to find the definition for this function / macro , how can
> anything not defined in the kernel source be called from blk-core.c ?
>
> Regards,
>
On Tue, Mar 30, 2010 at 01:05:28PM +0530, Onkar Mahajan wrote:
> Hi Kernelnewbies,
> Please suggest me a good tutorial for learning basic kernel
> programming stuff. Basics such as :
> (1) Sending data from kernel => user land
> (2) How to trace function calls in kernel ?
What do you mea
On Tue, Mar 02, 2010 at 09:32:16AM +0530, Manish Katiyar wrote:
> Hello all,
>
> Is the following code valid ???
>
> foo() {
> ...
> spin_lock(lock);
> ptr = kzalloc(size, GFP_KERNEL);
> spin_unlock(lock);
> .
> }
You can't because GFP_KERNEL involves the fact
kzalloc might sleep w
On Tue, Dec 29, 2009 at 09:15:32AM -0500, Robert P. J. Day wrote:
>
> from kernel/timer.c:
>
> /*
> * The 64-bit jiffies value is not atomic - you MUST NOT read it
> * without sampling the sequence number in xtime_lock.
> * jiffies is defined in the linker script...
> */
>
> void do_timer(
On Thu, Sep 03, 2009 at 09:25:40AM +0200, luca ellero wrote:
> Bernd Petrovitsch ha scritto:
>> On Wed, 2009-09-02 at 15:17 +0530, Anuz Pratap Singh Tomar wrote:
>>
>>> On Wed, Sep 2, 2009 at 2:30 PM, Bernd Petrovitsch
>>> wrote:
>>> On Wed, 2009-09-02 at 13:31 +0530, Anuz Pratap Singh Tom
Hi Paolo,
On Thu, Mar 19, 2009 at 02:35:13PM +0100, Paolo wrote:
> Hi!
> I'm using ftrace in order to trace any task or process running. I'm
> interesting to the context switch tracing. Ok, I've enabled sched_switch and
> the results are in the trace file.
> How can I interpretate correctly the re
On Fri, Mar 06, 2009 at 12:58:35AM +0530, Mohit Varma wrote:
> Hi,
>
> I am a Java application programmer trying to get a foothold in the world of
> linux programming.My areas of of interest are Device Drivers & network
> programming - to play around with protocols to be precise.
>
> I am facing
On Wed, Feb 18, 2009 at 11:00:30AM +0530, nidhi mittal wrote:
> hi
> a very small doubt may be to ask on forum ...
>
> i wanted to user strlen in kernel module
> for that i will have to include string.h
> but as we know
> that is a user space library
> so what shd i include to use strlen
On Sat, Feb 14, 2009 at 05:22:06PM +0530, Sukanto Ghosh wrote:
> Hi,
>
> I have made some changes to the memory management part of the kernel
> as an experiment. Now when I boot into that kernel and start some
> heavy processes (which cause paging), the kernel hangs. I can't even
> type anything.
On Mon, Dec 29, 2008 at 01:49:18AM +0530, Shyam Burkule wrote:
> Hello,
> I am sorry for asking silly question.
>
>In windows basic execution unit is thread, and Linux does not
> differentiate between thread and process( I mean Linux doesn't give special
> treatment for thread essentially
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