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vmdk: Flush only once in vmdk_L2update()

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If we have a backup L2 table, we currently flush once after writing to
the active L2 table and again after writing to the backup table. A
single flush is enough and makes things a little less slow.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20200430133007.170335-6-kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2020-04-30 15:30:06 +02:00
parent 78cae78dbc
commit 2758be056b
1 changed files with 5 additions and 2 deletions
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7
block/vmdk.c
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@ -1435,7 +1435,7 @@ static int vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data,
offset = cpu_to_le32(offset);
/* update L2 table */
BLKDBG_EVENT(extent->file, BLKDBG_L2_UPDATE);
if (bdrv_pwrite_sync(extent->file,
if (bdrv_pwrite(extent->file,
((int64_t)m_data->l2_offset * 512)
+ (m_data->l2_index * sizeof(offset)),
&offset, sizeof(offset)) < 0) {
@ -1444,13 +1444,16 @@ static int vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data,
/* update backup L2 table */
if (extent->l1_backup_table_offset != 0) {
m_data->l2_offset = extent->l1_backup_table[m_data->l1_index];
if (bdrv_pwrite_sync(extent->file,
if (bdrv_pwrite(extent->file,
((int64_t)m_data->l2_offset * 512)
+ (m_data->l2_index * sizeof(offset)),
&offset, sizeof(offset)) < 0) {
return VMDK_ERROR;
}
}
if (bdrv_flush(extent->file->bs) < 0) {
return VMDK_ERROR;
}
if (m_data->l2_cache_entry) {
*m_data->l2_cache_entry = offset;
}