[Xen-changelog] [xen-unstable] xl cpupool-numa-split: reduce number of Dom0 vcpus

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User Juergen Gross <juergen.gross@xxxxxxxxxxxxxx>
# Date 1297971553 0
# Node ID 2afa06e1f103f14da7118bd27db8e69f228a05fe
# Parent  2ad66067784da47eef7ce2d0a204fbeae0557ef1
xl cpupool-numa-split: reduce number of Dom0 vcpus

When reducing the number of physical cpus available for Domain-0 by xl
cpupool-numa-split, reduce the number of vcpus accordingly.

Signed-off-by: juergen.gross@xxxxxxxxxxxxxx
Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Signed-off-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
---
 tools/libxl/xl_cmdimpl.c |   27 +++++++++++++++++++++++++--
 1 files changed, 25 insertions(+), 2 deletions(-)

diff -r 2ad66067784d -r 2afa06e1f103 tools/libxl/xl_cmdimpl.c
--- a/tools/libxl/xl_cmdimpl.c  Thu Feb 17 19:12:45 2011 +0000
+++ b/tools/libxl/xl_cmdimpl.c  Thu Feb 17 19:39:13 2011 +0000
@@ -5785,6 +5785,7 @@ int main_cpupoolnumasplit(int argc, char
     libxl_cpumap cpumap;
     libxl_cpupoolinfo *poolinfo;
     libxl_topologyinfo topology;
+    libxl_dominfo info;
 
     while ((opt = getopt(argc, argv, "h")) != -1) {
         switch (opt) {
@@ -5840,11 +5841,33 @@ int main_cpupoolnumasplit(int argc, char
         goto out;
     }
 
+    n = 0;
     for (c = 0; c < topology.nodemap.entries; c++) {
         if (topology.nodemap.array[c] == node) {
             topology.nodemap.array[c] = LIBXL_CPUARRAY_INVALID_ENTRY;
-        }
-    }
+            libxl_cpumap_set(&cpumap, n);
+            n++;
+        }
+    }
+    if (libxl_set_vcpuonline(&ctx, 0, &cpumap)) {
+        fprintf(stderr, "error on removing vcpus for Domain-0\n");
+        goto out;
+    }
+    for (c = 0; c < 10; c++) {
+        if (libxl_domain_info(&ctx, &info, 0)) {
+            fprintf(stderr, "error on getting info for Domain-0\n");
+            goto out;
+        }
+        if (info.vcpu_online == n) {
+            break;
+        }
+        sleep(1);
+    }
+    if (info.vcpu_online > n) {
+        fprintf(stderr, "failed to offline vcpus\n");
+        goto out;
+    }
+    memset(cpumap.map, 0, cpumap.size);
 
     for (c = 0; c < topology.nodemap.entries; c++) {
         if (topology.nodemap.array[c] == LIBXL_CPUARRAY_INVALID_ENTRY) {

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