rpms/kernel/devel xen-sched-sedf.patch, NONE, 1.1 kernel-2.6.spec, 1.2046, 1.2047

[fedora-cvs-commits at redhat.com]

Author: jmorris

Update of /cvs/dist/rpms/kernel/devel
In directory cvs.devel.redhat.com:/tmp/cvs-serv23159

Modified Files:
	kernel-2.6.spec 
Added Files:
	xen-sched-sedf.patch 
Log Message:
Modify default parameters for dom0 sched-sedf so that domX's don't
get soft cpu lockups when dom0 and they are under heavy load.
Addresses bz 181856.



xen-sched-sedf.patch:
 sched_sedf.c |    6 ++++++
 1 files changed, 6 insertions(+)

--- NEW FILE xen-sched-sedf.patch ---
Signed-off-by: James Morris <jmorris at redhat.com>

--- xen-3.0.1/xen/common/sched_sedf.c	2006-03-01 17:39:01.000000000 -0500
+++ xen-3.0.1.w/xen/common/sched_sedf.c	2006-03-13 02:29:18.000000000 -0500
@@ -374,9 +374,15 @@
     if ( d->domain->domain_id == 0 )
     {
         /*set dom0 to something useful to boot the machine*/
+        /*
+         * jmorris at redhat.com: workaround to stop soft cpu lockups
+         * in guests, per
+         * http://lists.xensource.com/archives/html/xen-devel/2006-02/msg00721.html
+         */
         inf->period    = MILLISECS(20);
         inf->slice     = MILLISECS(15);
         inf->latency   = 0;
+        inf->extraweight = 1;
         inf->deadl_abs = 0;
         inf->status     = EXTRA_AWARE | SEDF_ASLEEP;
     }


Index: kernel-2.6.spec
===================================================================
RCS file: /cvs/dist/rpms/kernel/devel/kernel-2.6.spec,v
retrieving revision 1.2046
retrieving revision 1.2047
diff -u -r1.2046 -r1.2047
--- kernel-2.6.spec	12 Mar 2006 00:53:16 -0000	1.2046
+++ kernel-2.6.spec	13 Mar 2006 17:13:58 -0000	1.2047
@@ -421,6 +421,9 @@
 # Do not add anything non-trivial here.
 Patch10001: linux-2.6-random-patches.patch
 
+# Xen hypervisor patches
+Patch20000: xen-sched-sedf.patch
+
 # END OF PATCH DEFINITIONS
 
 BuildRoot: %{_tmppath}/kernel-%{KVERREL}-root
@@ -705,6 +708,7 @@
 %if %{buildxen}
 cd xen
 # Any necessary hypervisor patches go here
+%patch20000 -p2
 cd ..
 %endif
 cd linux-%{kversion}.%{_target_cpu}