Interception for a resource based scheduler

[selvakumar nagendran]

hi,
  I am using these information for the scheduler I am
developing in Linux. The scheduler selects the next
process to run based on the resources needed so that a
high priority process will not starve for a semaphore
key, file lock etc that were acquired by a low
priority process. The user may change the file
descriptor only through syscalls. If I intercept them
and update the resource history that I am maintaining,
then will the information break?

Thanks,
selva

--- Arjan van de Ven <arjan@xxxxxxxxxxxxx> wrote:

> On Thu, 2004-12-30 at 04:13 -0800, selvakumar
> nagendran wrote:
> > 
> >      Thanks for ur help. The user will be changing
> > this using system calls like dup,dup2 etc. If I
> keep
> > track of all these modifications by intercepting
> all
> > those syscalls and use inode number for
> identifying
> > the structure uniquely, will it break?
> 
> it sure is not a reliable method. The user can
> change the fd's YOU log.
> So your logging is inaccurate. That may or may not
> be a problem, it
> depends on what the application of this is.
> 
> 
> 



		
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