diff options
Diffstat (limited to 'block/qcow2.h')
| -rw-r--r-- | block/qcow2.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/block/qcow2.h b/block/qcow2.h index 0076512af4..5936d299a3 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -62,11 +62,14 @@ #define MIN_CLUSTER_BITS 9 #define MAX_CLUSTER_BITS 21 -#define MIN_L2_CACHE_SIZE 1 /* cluster */ +/* Must be at least 2 to cover COW */ +#define MIN_L2_CACHE_SIZE 2 /* clusters */ /* Must be at least 4 to cover all cases of refcount table growth */ #define MIN_REFCOUNT_CACHE_SIZE 4 /* clusters */ +/* Whichever is more */ +#define DEFAULT_L2_CACHE_CLUSTERS 8 /* clusters */ #define DEFAULT_L2_CACHE_BYTE_SIZE 1048576 /* bytes */ /* The refblock cache needs only a fourth of the L2 cache size to cover as many |