[Xen-changelog] Only BSP can really do clear_all_shadow_status.

[Xen patchbot -3.0-testing <patchbot-3.0-testing@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID 07408313ce33971c77714967c219d9ba8ca083cd
# Parent  d216ced3e34aec5d8e77b7c0c31022ec81d3af05
Only BSP can really do clear_all_shadow_status.
This fixes SMP IA32 VMX guest booting on IA32 xen.

Signed-off-by: Xin Li <xin.b.li@xxxxxxxxx>

diff -r d216ced3e34a -r 07408313ce33 xen/arch/x86/shadow32.c
--- a/xen/arch/x86/shadow32.c   Sat Apr 15 21:48:08 2006
+++ b/xen/arch/x86/shadow32.c   Sun Apr 16 14:45:57 2006
@@ -3275,19 +3275,29 @@
 
 void clear_all_shadow_status(struct domain *d)
 {
+    struct vcpu *v = current;
+
+    /*
+     * Don't clean up while other vcpus are working.
+     */
+    if ( v->vcpu_id )
+        return;
+
     shadow_lock(d);
+
     free_shadow_pages(d);
     free_shadow_ht_entries(d);
-    d->arch.shadow_ht = 
+    d->arch.shadow_ht =
         xmalloc_array(struct shadow_status, shadow_ht_buckets);
     if ( d->arch.shadow_ht == NULL ) {
-        printk("clear all shadow status:xmalloc fail\n");
+        printk("clear all shadow status: xmalloc failed\n");
         domain_crash_synchronous();
     }
     memset(d->arch.shadow_ht, 0,
            shadow_ht_buckets * sizeof(struct shadow_status));
 
     free_out_of_sync_entries(d);
+
     shadow_unlock(d);
 }
 

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