fork

Linux kernel development by Robert Love describes the fork process as fork() -> clone() -> do_fork() -> copy_process() I am unable to find the clone() system call in linux 3.13. Can someone explain the proper flow of fork() system call initiated by the user? Where can I find the libc

Re: system call

I am using Ubuntu On Sat, Apr 9, 2016 at 8:04 PM, Pranay Srivastava <pran...@gmail.com> wrote: > On Sat, Apr 9, 2016 at 7:51 PM, Nitin Varyani <varyani.nit...@gmail.com> > wrote: > > I have a 64 bit machine > > > > Before changing the source try to build, inst

Re: system call

gt; > On Thu, Apr 7, 2016 at 11:53 AM, Nitin Varyani <varyani.nit...@gmail.com> > wrote: > > > > Hi, > > I want to implement a system call as explained in Linux kernel > development by Robert Love. > > > > He does three things > > adding entr

system call

Hi, I want to implement a system call as explained in Linux kernel development by Robert Love. He does three things adding entry to entry.S adding entry to asm/unistd.h and adding the system call code to sched.c and then make + make install I do not want to implement for all

Re: Attach my own pid

t 4:57 PM, Nitin Varyani <varyani.nit...@gmail.com> wrote: > If I do the following thing: > > struct pid remote_struct_pid; > remote_struct_pid.numbers[0].nr=*my_pid*; > p = copy_process(clone_flags, stack_start, stack_size, child_tidptr, > *remote_struct_pid*, trace, tls)

Re: Attach my own pid

01:26 -0400, valdis.kletni...@vt.edu wrote: > > On Mon, 21 Mar 2016 16:01:41 +0530, Nitin Varyani said: > > > > > I am running a master user-level process at Computer 1 which sends a > > > process context like code, data, registers, PC, etc as well as *"pid"* > to

Re: Attach my own pid

wrote: > Nitin, > > > On Mon, Mar 21, 2016 at 4:03 PM, Nitin Varyani <varyani.nit...@gmail.com> > wrote: > > .Continued That is, if kernel at Computer 2 finds that pid of a > > process requesting a system call is 1500, the request is forwarded to &g

Re: Attach my own pid

tion to corresponding representative process which requests the kernel for the system call and sends the result back to slave daemon. On Mon, Mar 21, 2016 at 4:03 PM, Nitin Varyani <varyani.nit...@gmail.com> wrote: > .Continued That is, if kernel at Computer 2 finds that pid of a &

Re: Attach my own pid

. On Mon, Mar 21, 2016 at 4:01 PM, Nitin Varyani <varyani.nit...@gmail.com> wrote: > I am trying to create a distributed pid space. > > 0 to 2000 Computer 1 > 2001 to 4000 Computer 2 > 4001 to 6000 Computer 3 > > and so on... > > I am running a master user-level

Re: Attach my own pid

ess belongs to local node or to the master node?". That is, if kernel at Computer 2 pid of the process is 1500 On Mon, Mar 21, 2016 at 12:23 PM, <valdis.kletni...@vt.edu> wrote: > On Mon, 21 Mar 2016 10:33:44 +0530, Nitin Varyani said: > > > Sub-task 1: Until now, parent process

Re: Attach my own pid

, 2016 at 12:03 AM, <valdis.kletni...@vt.edu> wrote: > On Sun, 20 Mar 2016 02:07:29 -0700, Nitin Varyani said: > > > The linux kernel attaches a pid to newly forked process. I want to > > create a facility by which a process has the option of attaching a new >

Attach my own pid

Hi, The linux kernel attaches a pid to newly forked process. I want to create a facility by which a process has the option of attaching a new pid to its child which is not in the pid space. Any suggestions of how this can be achieved? Nitin

stack pointer

struct task_struct { volatile long state; /* -1 unrunnable, 0 runnable, >0 stopped */* void *stack;* atomic_t usage; unsigned int flags; /* per process flags, defined below */ unsigned int ptrace; What does the field void *stack indicate here? Is it the pointer to kernel stack of the process?

Re: remote system call

Codes are huge and documentation is negligible. How can I separate whay I want to achieve from that big code? On Thu, Mar 3, 2016 at 10:07 PM, Mulyadi Santosa <mulyadi.sant...@gmail.com> wrote: > > > On Thu, Mar 3, 2016 at 6:12 PM, Nitin Varyani <varyani.nit...@gmail.com

remote system call

Hi, I want to migrate user context of a process to a remote machine (i.e. registers, code, data, virtual memory and program counter) and when it makes a system call or file i/o, I want to send that request to its home node. That is, the user process executing at remote node will copy

Re: Distributed Process Scheduling Algorithm

7PM +0530, Nitin Varyani wrote: >> Rather than trying to go blind folded in getting practical experience >> of linux programming, I want to gain experience only in relation to my >> task of creating a distributed process scheduler. What all things >> should I try to work

Re: Distributed Process Scheduling Algorithm

wrote: > On Wed, 17 Feb 2016 10:21:35 +0530, Nitin Varyani said: > >> Actually it is a master's thesis research project as of now. I am ready to >> boil down to the most basic implementation of distributed linux kernel. >> Assume there is no network connection and no open f

Re: Process scheduling

, Mulyadi Santosa <mulyadi.sant...@gmail.com > wrote: > > > On Mon, Feb 15, 2016 at 7:37 PM, Nitin Varyani <varyani.nit...@gmail.com> > wrote: > >> >> >> On Mon, Feb 15, 2016 at 6:06 PM, Nitin Varyani <varyani.nit...@gmail.com> >> wrote: >>

Re: Distributed Process Scheduling Algorithm

if you say "no network connections" and "no open files", the problem gets a lot easier - but also quickly devolving into a master's thesis research project rather than anything useful Actually it is a master's thesis research project as of now. I am ready to boil down to the most basic

Re: Distributed Process Scheduling Algorithm

, Nitin Varyani <varyani.nit...@gmail.com> wrote: > According to my project requirement, I need a distributed algorithm so > mesos will not work. But work stealing is the best bargain. It will save > communication costs. Thankyou. Can you please elaborate on the last part of > your

Re: Distributed Process Scheduling Algorithm

din...@linux.vnet.ibm.com> wrote: > On Tue, 16 Feb 2016 00:13:34 -0500 > valdis.kletni...@vt.edu wrote: > > > On Tue, 16 Feb 2016 10:18:26 +0530, Nitin Varyani said: > > > > > 1) Sending process context via network > > > > Note that this is a non-trivial issue

Re: Distributed Process Scheduling Algorithm

. On Mon, Feb 15, 2016 at 10:22 PM, Henrik Austad <hen...@austad.us> wrote: > On Mon, Feb 15, 2016 at 09:35:28PM +0530, Nitin Varyani wrote: > > Hi, > > Hi Nitin, > > > I am given a task to design a distributed process scheduling algorithm. > > Current distribu

Distributed Process Scheduling Algorithm

Hi, I am given a task to design a distributed process scheduling algorithm. Current distributed OS are patch work over the linux kernels, that is, they are responsible for load balancing through process migration but the scheduling is taken care by the single machine linux kernels. My task is to

Re: Process scheduling

On Mon, Feb 15, 2016 at 6:06 PM, Nitin Varyani <varyani.nit...@gmail.com> wrote: > Hi > I have studied LInux kernel CFS scheduling algorithm - the > vruntime, weights, nice value, etc. I am able to understand the code. > Actually the task given to me is really ve

Re: Process scheduling

thanks On Sat, Feb 13, 2016 at 2:19 PM, Henrik Austad <hen...@austad.us> wrote: > On Sat, Feb 13, 2016 at 11:42:57AM +0530, Nitin Varyani wrote: > > Hello, > > Hi Nitin, > > > I want to understand the flow of code of process scheduler of > >

Process scheduling

Hello, I want to understand the flow of code of process scheduler of linux kernel. What I have understood is that The task marks itself as sleeping, puts itself on a wait queue, removes itself from the red-black tree of runnable, and calls schedule() to select a new process to execute.

Process Scheduling

Hi, I am new to kernel source. I want to plugin a new process scheduling algorithm. Can someone elaborate the steps to do it? Nitin ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org