Hi,
Thanks for your reply.
I can't use Tasklet or workqueues because I called this function from
Netfilter hook function. Is there any way to solve this problem?
With Thanks & Regards,
K. Lekshmanan
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Martin Candurra
Sent: Saturday, January 19, 2008 8:01 PM
To: Matthias Kaehlcke
Cc: [email protected]
Subject: Re: working files from Interupt routine
On Jan 19, 2008 4:48 AM, Matthias Kaehlcke <[EMAIL PROTECTED]>
wrote:
> El Thu, Jan 17, 2008 at 03:04:08PM -0200 Martin Candurra ha dit:
>
> > Writing to a file probably puts the process to sleep. That is not
possible
> > if you are in an interrupt context,
> > even if you could, the idea of an interrupt handler is to be as
quick as
> > possible.
> >
> > You have to use Tasklets for what you want to do. You can check
how to use
> > it from Linux Device Drivers book.
>
> tasklets also run in interrupt context (on top of
> softirqs). workqueues are the only bottom halve mechanism that allowes
> sleeping.
Yes, indeed. You are right about it.
Kathiresan, why don't you give us a big picture of your situation ? As
Matthias said, workqueues is the only bottom halve that allow your
code to sleep because they use their own threads.
If what you need is to write some kernel data to a file, the best
approach is using the /proc filesystem from your module. After doing
it, you can write the data to a file reading that proc file from user
mode. If you don't know how to do this, take a look at Linux Device
Drivers, chapter 4. It is really easy.
Best Regards.
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