On Sun 29 Jul 2018 11:27:44 PM CEST, Leonid Bloch wrote:
The caches are now recalculated upon image resizing. This is done
because the new default behavior of assigning a sufficient L2 cache to
cover the entire image implies that the cache will still be sufficient
after image resizing. To put a limit on the cache, the options
cache-size and l2-cache-size can be used.
Signed-off-by: Leonid Bloch <address@hidden>
---
block/qcow2.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/block/qcow2.c b/block/qcow2.c
index 74f2cb10a4..06fac1bb8c 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -3656,6 +3656,12 @@ static int coroutine_fn
qcow2_co_truncate(BlockDriverState *bs, int64_t offset,
}
s->l1_vm_state_index = new_l1_size;
+ /* Update cache sizes */
+ QDict *options = qdict_clone_shallow(bs->options);
+ ret = qcow2_update_options(bs, options, s->flags, errp);
+ if (ret < 0) {
+ goto fail;
+ }
Perhaps this could be merged with the "Update total_sectors when
resizing" patch. When you put both changes together it is quite clear
why you need to update bs->total_sectors, and doing it is only necessary
if you want to do this afterwards.