Tim Deegan
2010-Jul-08 11:19 UTC
[Xen-devel] [PATCH] xen: allow HVM save/restore from different changesets
Allow HVM save/restore from different changesets of Xen.
The HVM save records are supposed to be backwards compatible; XenServer
live-migrates between versions of Xen during upgrades.
Signed-off-by: Tim Deegan <Tim.Deegan@citrix.com>
diff -r 281896d3343a xen/common/hvm/save.c
--- a/xen/common/hvm/save.c Thu Jul 08 12:07:16 2010 +0100
+++ b/xen/common/hvm/save.c Thu Jul 08 12:10:59 2010 +0100
@@ -184,8 +184,6 @@
int hvm_load(struct domain *d, hvm_domain_context_t *h)
{
- char *c;
- uint64_t cset;
struct hvm_save_header hdr;
struct hvm_save_descriptor *desc;
hvm_load_handler handler;
@@ -200,21 +198,6 @@
if ( arch_hvm_load(d, &hdr) )
return -1;
-
- c = strrchr(xen_changeset(), '':'');
- if ( hdr.changeset == -1ULL )
- gdprintk(XENLOG_WARNING,
- "HVM restore: Xen changeset was not saved.\n");
- else if ( c == NULL )
- gdprintk(XENLOG_WARNING,
- "HVM restore: Xen changeset is not available.\n");
- else
- {
- cset = simple_strtoll(c, NULL, 16);
- if ( hdr.changeset != cset )
- gdprintk(XENLOG_WARNING, "HVM restore: saved Xen changeset
(%#"PRIx64
- ") does not match host (%#"PRIx64").\n",
hdr.changeset, cset);
- }
/* Down all the vcpus: we only re-enable the ones that had state saved. */
for_each_vcpu(d, v)
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