diff options
Diffstat (limited to 'block/qcow2.c')
| -rw-r--r-- | block/qcow2.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/block/qcow2.c b/block/qcow2.c index 435e0e11d0..0f1be2e384 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -470,6 +470,7 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags, uint64_t l1_vm_state_index; const char *opt_overlap_check; int overlap_check_template = 0; + uint64_t l2_cache_size, refcount_cache_size; ret = bdrv_pread(bs->file, 0, &header, sizeof(header)); if (ret < 0) { @@ -707,8 +708,18 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags, } /* alloc L2 table/refcount block cache */ - s->l2_table_cache = qcow2_cache_create(bs, L2_CACHE_SIZE); - s->refcount_block_cache = qcow2_cache_create(bs, REFCOUNT_CACHE_SIZE); + l2_cache_size = DEFAULT_L2_CACHE_BYTE_SIZE / s->cluster_size; + if (l2_cache_size < MIN_L2_CACHE_SIZE) { + l2_cache_size = MIN_L2_CACHE_SIZE; + } + + refcount_cache_size = l2_cache_size / DEFAULT_L2_REFCOUNT_SIZE_RATIO; + if (refcount_cache_size < MIN_REFCOUNT_CACHE_SIZE) { + refcount_cache_size = MIN_REFCOUNT_CACHE_SIZE; + } + + s->l2_table_cache = qcow2_cache_create(bs, l2_cache_size); + s->refcount_block_cache = qcow2_cache_create(bs, refcount_cache_size); if (s->l2_table_cache == NULL || s->refcount_block_cache == NULL) { error_setg(errp, "Could not allocate metadata caches"); ret = -ENOMEM; |