From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47176) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fn8Ul-0000Du-6s for qemu-devel@nongnu.org; Tue, 07 Aug 2018 16:22:19 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fn8Ug-000891-Ll for qemu-devel@nongnu.org; Tue, 07 Aug 2018 16:22:19 -0400 From: Leonid Bloch Date: Tue, 7 Aug 2018 23:21:20 +0300 Message-Id: <20180807202122.27006-4-lbloch@janustech.com> In-Reply-To: <20180807202122.27006-1-lbloch@janustech.com> References: <20180807202122.27006-1-lbloch@janustech.com> MIME-Version: 1.0 Content-Type: text/plain Subject: [Qemu-devel] [PATCH v2 3/5] qcow2: Resize the cache upon image resizing List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, Kevin Wolf , Max Reitz , Eric Blake , Alberto Garcia , Leonid Bloch 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 an image resizing. Signed-off-by: Leonid Bloch --- block/qcow2.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/block/qcow2.c b/block/qcow2.c index 98cb96aaca..f60cb92169 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -3639,6 +3639,8 @@ static int coroutine_fn qcow2_co_truncate(BlockDriverState *bs, int64_t offset, } } + bs->total_sectors = offset / BDRV_SECTOR_SIZE; + /* write updated header.size */ offset = cpu_to_be64(offset); ret = bdrv_pwrite_sync(bs->file, offsetof(QCowHeader, size), @@ -3649,6 +3651,12 @@ 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; + } ret = 0; fail: qemu_co_mutex_unlock(&s->lock); -- 2.17.1