From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39135) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bLZTw-0001Zw-EN for qemu-devel@nongnu.org; Fri, 08 Jul 2016 13:22:29 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bLZTv-0008WG-DX for qemu-devel@nongnu.org; Fri, 08 Jul 2016 13:22:28 -0400 From: Kevin Wolf Date: Fri, 8 Jul 2016 19:21:40 +0200 Message-Id: <1467998504-15744-29-git-send-email-kwolf@redhat.com> In-Reply-To: <1467998504-15744-1-git-send-email-kwolf@redhat.com> References: <1467998504-15744-1-git-send-email-kwolf@redhat.com> Subject: [Qemu-devel] [PULL 28/32] vmdk: fix metadata write regression List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-block@nongnu.org Cc: kwolf@redhat.com, qemu-devel@nongnu.org From: Reda Sallahi Commit "cdeaf1f vmdk: add bdrv_co_write_zeroes" causes a regression on writes. It writes metadata after every write instead of doing it only once for each cluster. vmdk_pwritev() writes metadata whenever m_data is set as valid so this patch sets m_data as valid only when we have a new cluster which hasn't been allocated before or a zero grain. Signed-off-by: Reda Sallahi Message-id: 20160707084249.29084-1-fullmanet@gmail.com Reviewed-by: Fam Zheng Signed-off-by: Max Reitz --- block/vmdk.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/block/vmdk.c b/block/vmdk.c index c9914f7..46d474e 100644 --- a/block/vmdk.c +++ b/block/vmdk.c @@ -1202,13 +1202,6 @@ static int get_cluster_offset(BlockDriverState *bs, l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size; cluster_sector = le32_to_cpu(l2_table[l2_index]); - if (m_data) { - m_data->valid = 1; - m_data->l1_index = l1_index; - m_data->l2_index = l2_index; - m_data->l2_offset = l2_offset; - m_data->l2_cache_entry = &l2_table[l2_index]; - } if (extent->has_zero_grain && cluster_sector == VMDK_GTE_ZEROED) { zeroed = true; } @@ -1231,6 +1224,13 @@ static int get_cluster_offset(BlockDriverState *bs, if (ret) { return ret; } + if (m_data) { + m_data->valid = 1; + m_data->l1_index = l1_index; + m_data->l2_index = l2_index; + m_data->l2_offset = l2_offset; + m_data->l2_cache_entry = &l2_table[l2_index]; + } } *cluster_offset = cluster_sector << BDRV_SECTOR_BITS; return VMDK_OK; -- 1.8.3.1