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qcow2: align cluster_data to block to improve performance using O_DIRECT 

Signed-off-by: Frediano Ziglio <freddy77@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Frediano Ziglio 2011-09-10 10:59:16 +02:00 committed by Kevin Wolf
parent 847f171e6a
commit dea43a65d6
1 changed files with 7 additions and 7 deletions
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14
block/qcow2.c
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@ -237,7 +237,7 @@ static int qcow2_open(BlockDriverState *bs, int flags)
s->cluster_cache = g_malloc(s->cluster_size);
/* one more sector for decompressed data alignment */
s->cluster_data = g_malloc(QCOW_MAX_CRYPT_CLUSTERS * s->cluster_size
s->cluster_data = qemu_blockalign(bs, QCOW_MAX_CRYPT_CLUSTERS * s->cluster_size
+ 512);
s->cluster_cache_offset = -1;
@ -296,7 +296,7 @@ static int qcow2_open(BlockDriverState *bs, int flags)
qcow2_cache_destroy(bs, s->l2_table_cache);
}
g_free(s->cluster_cache);
g_free(s->cluster_data);
qemu_vfree(s->cluster_data);
return ret;
}
@ -456,7 +456,7 @@ static int qcow2_co_readv(BlockDriverState *bs, int64_t sector_num,
*/
if (!cluster_data) {
cluster_data =
g_malloc0(QCOW_MAX_CRYPT_CLUSTERS * s->cluster_size);
qemu_blockalign(bs, QCOW_MAX_CRYPT_CLUSTERS * s->cluster_size);
}
assert(cur_nr_sectors <=
@ -496,7 +496,7 @@ fail:
qemu_co_mutex_unlock(&s->lock);
qemu_iovec_destroy(&hd_qiov);
g_free(cluster_data);
qemu_vfree(cluster_data);
return ret;
}
@ -566,7 +566,7 @@ static int qcow2_co_writev(BlockDriverState *bs,
if (s->crypt_method) {
if (!cluster_data) {
cluster_data = g_malloc0(QCOW_MAX_CRYPT_CLUSTERS *
cluster_data = qemu_blockalign(bs, QCOW_MAX_CRYPT_CLUSTERS *
s->cluster_size);
}
@ -611,7 +611,7 @@ fail:
qemu_co_mutex_unlock(&s->lock);
qemu_iovec_destroy(&hd_qiov);
g_free(cluster_data);
qemu_vfree(cluster_data);
return ret;
}
@ -628,7 +628,7 @@ static void qcow2_close(BlockDriverState *bs)
qcow2_cache_destroy(bs, s->refcount_block_cache);
g_free(s->cluster_cache);
g_free(s->cluster_data);
qemu_vfree(s->cluster_data);
qcow2_refcount_close(bs);
}