diff options
Diffstat (limited to 'block/qcow2-cache.c')
| -rw-r--r-- | block/qcow2-cache.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/block/qcow2-cache.c b/block/qcow2-cache.c index 2035cd8..121e6e9 100644 --- a/block/qcow2-cache.c +++ b/block/qcow2-cache.c @@ -248,6 +248,7 @@ static int qcow2_cache_do_get(BlockDriverState *bs, Qcow2Cache *c, BDRVQcowState *s = bs->opaque; int i; int ret; + int lookup_index; uint64_t min_lru_counter = UINT64_MAX; int min_lru_index = -1; @@ -255,7 +256,8 @@ static int qcow2_cache_do_get(BlockDriverState *bs, Qcow2Cache *c, offset, read_from_disk); /* Check if the table is already cached */ - for (i = 0; i < c->size; i++) { + i = lookup_index = (offset / s->cluster_size * 4) % c->size; + do { const Qcow2CachedTable *t = &c->entries[i]; if (t->offset == offset) { goto found; @@ -264,7 +266,10 @@ static int qcow2_cache_do_get(BlockDriverState *bs, Qcow2Cache *c, min_lru_counter = t->lru_counter; min_lru_index = i; } - } + if (++i == c->size) { + i = 0; + } + } while (i != lookup_index); if (min_lru_index == -1) { /* This can't happen in current synchronous code, but leave the check |