RE: task_struct and it's fields

["Narayana, Venkat A." <NarayVA@nsc-msg01.network.com>]

I tried that one too,but to no avail.I think the problem is not
that, for some reason, if i am trying to access these file_struct or
struct file pointers in task_struct, i get bombed.I put all the checks
needed, like testing for NULL or going over array boundry etc, but
of no use.
Who populates these task_struct members?When a task is not executing
what will happen to these members and their members?When a task finds
out that it need to get pages from VM space of process, where does it
go and get them, from disk?

Questions leads to more questions;-)

Thanks for your patience.
every bit of help makes me move forward.
Thanks and Regards
Venkat


-----Original Message-----
From: Greg KH [mailto:greg@wirex.com]
Sent: Friday, March 09, 2001 5:23 PM
To: Narayana, Venkat A.
Cc: 'kernelnewbies@nl.linux.org'
Subject: Re: task_struct and it's fields


Try changing:

>                if ( fileP++ )
>                {
> 			printk("owner =  [%d]\n",fileP->f_uid);
> 							^^^^^^^^^^^ 
> 						<offending variable.>
>                 }

To
	if (fileP) {
		printk("owner =  [%d]\n",fileP->f_uid);
	}
	++fileP;

Problem is that you are testing fileP, then incrementing it, and then
using the incremented version for the printk, boom, not good :)

greg k-h

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