29 lines
1.3 KiB
Diff
29 lines
1.3 KiB
Diff
diff --git a/nova/virt/xenapi/vm_utils.py b/nova/virt/xenapi/vm_utils.py
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index f88cb3a..982ad37 100644
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--- a/nova/virt/xenapi/vm_utils.py
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+++ b/nova/virt/xenapi/vm_utils.py
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@@ -137,6 +137,7 @@ MBR_SIZE_BYTES = MBR_SIZE_SECTORS * SECTOR_SIZE
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KERNEL_DIR = '/boot/guest'
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MAX_VDI_CHAIN_SIZE = 16
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PROGRESS_INTERVAL_SECONDS = 300
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+DD_BLOCKSIZE = 65536
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# Fudge factor to allow for the VHD chain to be slightly larger than
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# the partitioned space. Otherwise, legitimate images near their
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@@ -1159,6 +1160,7 @@ def generate_configdrive(session, instance, vm_ref, userdevice,
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utils.execute('dd',
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'if=%s' % tmp_file,
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'of=%s' % dev_path,
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+ 'bs=%d' % DD_BLOCKSIZE,
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'oflag=direct,sync',
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run_as_root=True)
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@@ -2426,6 +2428,7 @@ def _copy_partition(session, src_ref, dst_ref, partition, virtual_size):
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utils.execute('dd',
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'if=%s' % src_path,
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'of=%s' % dst_path,
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+ 'bs=%d' % DD_BLOCKSIZE,
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'count=%d' % num_blocks,
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'iflag=direct,sync',
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'oflag=direct,sync',
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