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[Qemu-devel] [PATCH 2/2] Add check for cache size smaller than page size
From: |
Orit Wasserman |
Subject: |
[Qemu-devel] [PATCH 2/2] Add check for cache size smaller than page size |
Date: |
Tue, 7 Jan 2014 17:50:08 +0200 |
Signed-off-by: Orit Wasserman <address@hidden>
---
arch_init.c | 4 ++++
migration.c | 10 +++++++++-
2 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/arch_init.c b/arch_init.c
index 5c55c68..e52c9ba 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -176,6 +176,10 @@ static struct {
int64_t xbzrle_cache_resize(int64_t new_size)
{
+ if (new_size < TARGET_PAGE_SIZE) {
+ return -1;
+ }
+
if (XBZRLE.cache != NULL) {
return cache_resize(XBZRLE.cache, new_size / TARGET_PAGE_SIZE) *
TARGET_PAGE_SIZE;
diff --git a/migration.c b/migration.c
index 2b1ab20..f28aa1d 100644
--- a/migration.c
+++ b/migration.c
@@ -455,6 +455,7 @@ void qmp_migrate_cancel(Error **errp)
void qmp_migrate_set_cache_size(int64_t value, Error **errp)
{
MigrationState *s = migrate_get_current();
+ int64_t new_size;
/* Check for truncation */
if (value != (size_t)value) {
@@ -463,8 +464,14 @@ void qmp_migrate_set_cache_size(int64_t value, Error
**errp)
return;
}
- s->xbzrle_cache_size = xbzrle_cache_resize(value);
+ new_size = xbzrle_cache_resize(value);
+ if (new_size < 0) {
+ error_set(errp, QERR_INVALID_PARAMETER_VALUE, "cache size",
+ "is smaller than page size");
+ return;
+ }
+
+ s->xbzrle_cache_size = new_size;
}
int64_t qmp_query_migrate_cache_size(Error **errp)
--
1.8.3.1