[Xen-devel] [PATCH 13/14]: libxenlight, enables less than maximum vcpus

[Andres Lagar-Cavilla <andres@xxxxxxxxxxxxxxxx>]

Enable turning on a different amount of vcpus than
the maximum during domain creation/restore.

Signed-off-by: Andres Lagar-Cavilla <andres@xxxxxxxxxxxxxxxx>

# HG changeset patch
# User Andres Lagar-Cavilla <andres@xxxxxxxxxxxxxxxx>
# Date 1259597655 18000
# Node ID 0767f0bcfec197d2e4dbde58b36162308f349734
# Parent  5527664fbd0eeb423cb87d249fe74e5ab1321433
Enable turning on a different amount of vcpus than
the maximum during domain creation/restore.

Signed-off-by: Andres Lagar-Cavilla <andres@xxxxxxxxxxxxxxxx>

diff -r 5527664fbd0e -r 0767f0bcfec1 libxl.h
--- a/libxl.h
+++ b/libxl.h
@@ -64,6 +64,7 @@ typedef struct {
     int hpet;
     int vpt_align;
     int max_vcpus;
+    int cur_vcpus;
     uint32_t max_memkb;
     uint32_t video_memkb;
     uint32_t shadow_memkb;
diff -r 5527664fbd0e -r 0767f0bcfec1 libxl_dom.c
--- a/libxl_dom.c
+++ b/libxl_dom.c
@@ -89,7 +89,8 @@ int build_post(struct libxl_ctx *ctx, ui
     ents[9] = libxl_sprintf(ctx, "%lu", state->store_mfn);
     for (i = 0; i < info->max_vcpus; i++) {
         ents[10+(i*2)]   = libxl_sprintf(ctx, "cpu/%d/availability", i);
-        ents[10+(i*2)+1] = "online";
+        ents[10+(i*2)+1] = (i && info->cur_vcpus && (i >= info->cur_vcpus))
+                            ? "offline" : "online";
     }
 
     dom_path = libxl_xs_get_dompath(ctx, domid);

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