What's new in openMosix today and tomorrow ?

What's in openMosix today and tomorrow ?
========================================

 * debug interface moved to debugfs
 ----------------------------------
 I rewrited the debug code, which was available through /proc/hpc/debug
 to use debugfs. so now to have access to debug files, you need to activate
 CONFIG_OPENMOSIX_DEBUG_FS and then mount debugfs somewhere:
 	
	mount -t debugfs none /debug/

 then you'll have an "om" directory there, that contains the needed file to
 have verbose (migration | syscall | copyuser | files sharing)
 
 This cleanup lead me to more cleanup in the hpc/proc.c and to the next point.
 
 * openMosix control filesystem
 ------------------------------
 Instead of hacking into an already messy directory (/proc/) for having
 an openMosix interface (/proc/hpc/ and /proc/$PID/om/), a new filesystem
 will be add to provide an efficient clean interface for all openMosix
 purpose: migration and statistics collection.

 Here the benefit:
  . remove hack into procfs, which is seriously frown upon these days.
  . provide efficient interface to the userspace tools:
     - not have to read every task /proc/$PID/om/ directory every X ms.
     - give a list of migratable tasks, blocked tasks, .. in a single read.
     - provide various statistics.
     - add scheduler helper in the kernel for userspace.

 So, here an example of what will be available there (number are tasks pids):

		(mount -t omctrlfs none /om)
 /om/

 /om/blocked/			-> list of task that are blocked 
 /om/blocked/34			   for a reason or another
 /om/blocked/574		   (user request, stay reason)

 /om/migratable/		-> list of task that are good candidate for
 /om/migratable/93		   migration, provided by some heuristic
 /om/migratable/7623		   in kernel
 
 /om/deputy/			-> list task that are sent to $ip
 /om/deputy/$ip/456
 /om/deputy/$ip2/345
 /om/deputy/$ip2/7899
 
 /om/remote/			-> list task that come from $ip
 /om/remote/$ip/56

 /om/migration			-> migration order


 This is not done, so don't try to mount any omctrlfs yet.

 * openMosix dev tree using git
 ------------------------------
 I've now setup a public git tree, instead of the svn tree.
 
 URI: git://openmosix.snarc.org/kernel/

 here the command that you are likely to use:
 clone it  ===>  git clone git://openmosix.snarc.org/kernel/ linux-2.6-om
 update it ===>  (in the directory) git pull

-- 
Vincent Hanquez


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