kernel thread priority

kernel thread priority

[Subbu]

Hi,

     I have to run some part of my network driver code in a thread which 
should have highest priority.

     I am working on 2.4.20-8 redhat 9 kernel version.

     i am using kernel_thread function to run the current process in a
thread.

     How can i set the priority level of the same to the highest .

     please help me in this regard. what are the functions i should use
for this


   Thanx in advance
   subbu



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Re: kernel thread priority

[linux-os (Dick Johnson)]

On Fri, 7 Jul 2006, Subbu wrote:

>
> Hi,
>
>     I have to run some part of my network driver code in a thread which
> should have highest priority.
>
>     I am working on 2.4.20-8 redhat 9 kernel version.
>
>     i am using kernel_thread function to run the current process in a
> thread.
>
>     How can i set the priority level of the same to the highest .
>
>     please help me in this regard. what are the functions i should use
> for this
>
>
>   Thanx in advance
>   subbu
>

Older kernels required something like:
 	task_lock(current);
 	current->nice = PRIORITY;
 	task_unlock(current);

Newer kernels use:

 	set_user_nice(current, PRIORITY);

>
>
> "SASKEN RATED Among THE Top 3 BEST COMPANIES TO WORK FOR IN INDIA - SURVEY 2005 conducted by the BUSINESS TODAY - Mercer - TNS India"
>
>                           SASKEN BUSINESS DISCLAIMER
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Cheers,
Dick Johnson
Penguin : Linux version 2.6.16.4 on an i686 machine (5592.89 BogoMips).
New book: http://www.AbominableFirebug.com/
_
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Thank you.

Compiling Driver code for 2.6 kernel

[Subbu]

Hi,

   Please Help me as i am newbie to 2.6 kernel.

   I have My driver code for 2.4.20 kernel(Here i generate .o with 100's 
of .objs linked together).

   I have a main GNUMakefile linked with 10's of individual make files 
w.r.t different directories

   i am able to compile my source code and able to link all individual 
modules and generate final module.o (2.6). but i am not sure how to 
genrate .ko from the module.o i have.

   I understand the compilation for 2.6 is different.

   How i can generate .ko which is required for 2.6.

  1) Is a simple Makefile changes for 2.4 to 2.6 enough..?? then what needs 
to done in my GNUmakefile(not the kernel source)
  2) Is it required to use kernel source  GNUMakefile as given in examples 
***
  3) Is it o.k to compile individual 'c' files with .obj and linked to 
module.o

  Please help me in this regards

THanx in advance
Subbu


"SASKEN RATED Among THE Top 3 BEST COMPANIES TO WORK FOR IN INDIA - SURVEY 2005 conducted by the BUSINESS TODAY - Mercer - TNS India"

                           SASKEN BUSINESS DISCLAIMER
This message may contain confidential, proprietary or legally Privileged information. In case you are not the original intended Recipient of the message, you must not, directly or indirectly, use, Disclose, distribute, print, or copy any part of this message and you are requested to delete it and inform the sender. Any views expressed in this message are those of the individual sender unless otherwise stated. Nothing contained in this message shall be construed as an offer or acceptance of any offer by Sasken Communication Technologies Limited ("Sasken") unless sent with that express intent and with due authority of Sasken. Sasken has taken enough precautions to prevent the spread of viruses. However the company accepts no liability for any damage caused by any virus transmitted by this email

Re: Compiling Driver code for 2.6 kernel

[Arjan van de Ven]

On Mon, 2006-07-17 at 16:10 +0530, Subbu wrote:
> 
> Hi,
> 
>    Please Help me as i am newbie to 2.6 kernel.
> 
>    I have My driver code for 2.4.20 kernel(Here i generate .o with 100's 
> of .objs linked together).

wow that's a lot; I suspect you're going to want to consolidate that
somewhat when you send your driver for inclusion into the kernel.org
kernel


>    I have a main GNUMakefile linked with 10's of individual make files 
> w.r.t different directories
> 
>    i am able to compile my source code and able to link all individual 
> modules and generate final module.o (2.6). but i am not sure how to 
> genrate .ko from the module.o i have.

see Documentation/kbuild directory, it has many examples on this

but... it sounds like you oversplit your module... do you have a pointer
to the source of it? Maybe I can give some useful suggestions on how to
organize it...

Greetings,
    Arjan van de Ven

Memory allocation Failure problem with kmalloc.

[Subbu]

Hi,

   I am working on 2.4.20 kernel.

   I need to allocate memory with kmalloc.

   kmalloc fails because i want to allocate more than 128kb. How to handle 
this issue.

   Please help me in this regard.

   How i can allocate memory of size equal to 1Mb with kmalloc or any other 
function (2.4 kernel)

THanx in advance.
Subbu


"SASKEN RATED Among THE Top 3 BEST COMPANIES TO WORK FOR IN INDIA - SURVEY 2005 conducted by the BUSINESS TODAY - Mercer - TNS India"

                           SASKEN BUSINESS DISCLAIMER
This message may contain confidential, proprietary or legally Privileged information. In case you are not the original intended Recipient of the message, you must not, directly or indirectly, use, Disclose, distribute, print, or copy any part of this message and you are requested to delete it and inform the sender. Any views expressed in this message are those of the individual sender unless otherwise stated. Nothing contained in this message shall be construed as an offer or acceptance of any offer by Sasken Communication Technologies Limited ("Sasken") unless sent with that express intent and with due authority of Sasken. Sasken has taken enough precautions to prevent the spread of viruses. However the company accepts no liability for any damage caused by any virus transmitted by this email

Re: Memory allocation Failure problem with kmalloc.

[Jesper Juhl]

On 20/07/06, Subbu <subbu@sasken.com> wrote:
>
>
> Hi,
>
>    I am working on 2.4.20 kernel.
>
>    I need to allocate memory with kmalloc.
>
>    kmalloc fails because i want to allocate more than 128kb. How to handle
> this issue.
>
>    Please help me in this regard.
>
>    How i can allocate memory of size equal to 1Mb with kmalloc or any other
> function (2.4 kernel)
>
kmalloc() allocates physically contiguous pages. 1M is a hell of a lot
of contig pages to ask for. I doubt you can get that much except at
early boot. But, if the pages don't actually need to be physically
contiguous, then you can use vmalloc() - it'll give you a virtually
contiguous range but the pages are not nessesarily physically
contiguous.

Why do you need this much btw?

-- 
Jesper Juhl <jesper.juhl@gmail.com>
Don't top-post  http://www.catb.org/~esr/jargon/html/T/top-post.html
Plain text mails only, please      http://www.expita.com/nomime.html

Re: Memory allocation Failure problem with kmalloc.

[Jan Engelhardt]

> Hi,
>
>  I am working on 2.4.20 kernel.

Old.

>  I need to allocate memory with kmalloc.
>
>  kmalloc fails because i want to allocate more than 128kb.

http://lwn.net/Kernel/LDD3/
vmalloc, get_free_pages, ...

> How to handle this issue.

Error: Missing '?'

> "SASKEN RATED Among THE Top 3 BEST COMPANIES TO WORK FOR IN INDIA - SURVEY 2005
> conducted by the BUSINESS TODAY - Mercer - TNS India"

Self overrating.

>                          SASKEN BUSINESS DISCLAIMER

See another thread ;)


Jan Engelhardt
-- 

Kernel Thread priority

[Prabhu Chawandi]

Hi All.

  How can get to know the Kthread Priority,

in top commnad, it is showing RT, what does it mean ?

How to reset the kernel thread priorities ?


Thanks
Prabhu

Re: Kernel Thread priority

[Adayadil Thomas]

RT - Real Time ? (Just a guess)

On Thu, Sep 3, 2009 at 7:36 AM, Prabhu
Chawandi<prabhu.chavandi@gmail.com> wrote:
> Hi All.
>
>  How can get to know the Kthread Priority,
>
> in top commnad, it is showing RT, what does it mean ?
>
> How to reset the kernel thread priorities ?
>
>
> Thanks
> Prabhu
> --
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