ranjith kumar wrote:
Hi,
I think the program which is called by
call_usermodehelper() will not be executed at
privilege level zero on IA-32 machines.
Am I right?
Right. Only the kernel runs in privilege level (ring) 0.
How to run a program which has been compiled by a
compiler(say gcc) at privilege level zero?
You don't. Well, you could put it in the kernel...
Indeed I want to compare time taken in executing two
programs. If we run them at privilege level zero by
calling them in a kernel module, processor will not
switch to other processors.
That's a false assumption. Even kernel code is preemptible nowadays.
So that we can find out
time taken to execute a program more accurately.
If you run your program on an otherwise idle machine, the results should
be pretty accurate.
If you really think it matters, then run your program with real-time
priority.
What you say??
Thanks in advance.
Michal
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
