Adding new syscall
Bhosle, Mayur N
mbhosle3 at gatech.edu
Sun Jul 20 18:28:46 PDT 2008
: I am trying to add new system call for proportional share scheduler. I have written
:the code for the syscall in /kern/kern_resource.c and modified /sys/sysproto.h /kern/syscall.master.
:Most of the remaining files related to syscall are auto generated.
: The kernel compiles properly but the still the auto generated files donot show the new syscall that
:i have added. Is there any other file that needs to be modified. I am trying this on VKERNEL.
: Please let me know. Thanks
In your local source tree:
<dillon at backplane.com>
I added few system calls for the scheduler and they are working fine. I had to use syscall(); function to execute the system call. I want to know how do i invoke the system call from the command line, because the when i enter the command on the prompt it says 'the command is not recognised'.
Secondly, In the scheduling algorithm there is one invariant which requires a floating point operation. Currently i have approximated it, but i want to know how do you get around such a situation in kernel. What is the best way i can approximate this floating point operation.
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