cluster/group/gfs_controld cpg.c lock_dlm.h ma ...

[teigland@sourceware.org]

CVSROOT:	/cvs/cluster
Module name:	cluster
Branch: 	RHEL5
Changes by:	teigland@sourceware.org	2007-12-05 22:11:32

Modified files:
	group/gfs_controld: cpg.c lock_dlm.h main.c plock.c recover.c 

Log message:
	bz 359271
	
	A performance optimization for plocks.  This speeds up locks that are
	repeatedly accessed by processes on a single node.  Plocks used by
	processes on multiple nodes work the same way as before.  The
	optimization is disabled by default, and can be enabled by setting
	
	<gfs_controld plock_ownership="1"/>
	
	in cluster.conf, or by starting gfs_controld with "-o1".  It is disabled
	by default because enabling it breaks compatibility with previous
	versions of gfs_controld.  If all nodes in the cluster are running this
	version, then plock_ownership can be enabled.
	
	The plock_ownership mode needs extensive testing.  This also introduces
	some minor changes when plock_ownership is disabled, so new testing is
	also required in that mode.  Abhi and I worked on this together.

Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/group/gfs_controld/cpg.c.diff?cvsroot=cluster&only_with_tag=RHEL5&r1=1.9.2.3&r2=1.9.2.4
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/group/gfs_controld/lock_dlm.h.diff?cvsroot=cluster&only_with_tag=RHEL5&r1=1.21.2.9&r2=1.21.2.10
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/group/gfs_controld/main.c.diff?cvsroot=cluster&only_with_tag=RHEL5&r1=1.18.2.13&r2=1.18.2.14
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/group/gfs_controld/plock.c.diff?cvsroot=cluster&only_with_tag=RHEL5&r1=1.25.2.7&r2=1.25.2.8
http://sourceware.org/cgi-bin/cvsweb.cgi/cluster/group/gfs_controld/recover.c.diff?cvsroot=cluster&only_with_tag=RHEL5&r1=1.23.2.10&r2=1.23.2.11