<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML ><HEAD ><TITLE >Cluster Mask</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="The openMosix HOWTO" HREF="index.html"><LINK REL="UP" TITLE="Administrating openMosix" HREF="admin.html"><LINK REL="PREVIOUS" TITLE="the userspace-tools" HREF="x739.html"><LINK REL="NEXT" TITLE="Tuning Mosix" HREF="tuning.html"></HEAD ><BODY CLASS="SECT1" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >The openMosix HOWTO: </TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="x739.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Chapter 8. Administrating openMosix</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="tuning.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="AEN861" ></A >8.4. Cluster Mask</H1 ><P >(by Moshe Bar)</P ><P >Several people have asked for a feature in openMosix which allows to specifiy to which nodes a given process and it's children can migrate and to which nodes it cannot.</P ><P >Simone Ettore has just committed a new patch to the CVS which allows you to do just that.</P ><P >Here is how it works: <P ></P ><UL ><LI ><P >/proc/[pid]/migfilter enable/disable the capability of filter migration.</P ></LI ><LI ><P >/proc/[pid]/mignodes is a bit-list of nodes. The bit position of a node is calculated as 2^(PE-1). PE is node number.</P ></LI ><LI ><P >/proc/[pid]/migpolicy is the policy of the filtering: 0=DENY: the process can migrate in all nodes except when the relative bit on mignodes is 1 1=ALLOW: the process can migrate in all nodes where the relative bit on mignodes is 1</P ></LI ></UL ></P ><P > We are shortly going to release also a simple user-land tool to set the node mask, but I would like you guys to give it a try asap before we release it as openMosix 2.4.20-3.</P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="x739.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="tuning.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >the userspace-tools</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="admin.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Tuning Mosix</TD ></TR ></TABLE ></DIV ></BODY ></HTML >