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[Qemu-devel] [PATCH 5/8] XBZRLE cache size should not be larger than gue


From: Juan Quintela
Subject: [Qemu-devel] [PATCH 5/8] XBZRLE cache size should not be larger than guest memory size
Date: Tue, 4 Feb 2014 16:19:42 +0100

From: Orit Wasserman <address@hidden>

Signed-off-by: Orit Wasserman <address@hidden>
Signed-off-by: Juan Quintela <address@hidden>
---
 migration.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/migration.c b/migration.c
index 46a7305..25add6f 100644
--- a/migration.c
+++ b/migration.c
@@ -479,6 +479,13 @@ void qmp_migrate_set_cache_size(int64_t value, Error 
**errp)
         return;
     }

+    /* Cache should not be larger than guest ram size */
+    if (value > ram_bytes_total()) {
+        error_set(errp, QERR_INVALID_PARAMETER_VALUE, "cache size",
+                  "exceeds guest ram size ");
+        return;
+    }
+
     new_size = xbzrle_cache_resize(value);
     if (new_size < 0) {
         error_set(errp, QERR_INVALID_PARAMETER_VALUE, "cache size",
-- 
1.8.5.3




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