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| author | Max Reitz <mreitz@redhat.com> | 2021-03-26 15:55:08 +0100 |
|---|---|---|
| committer | Max Reitz <mreitz@redhat.com> | 2021-03-30 13:02:10 +0200 |
| commit | 484108293d94d80acd5a2f4332eaea5e2605947a (patch) | |
| tree | b7027cc72f7680b4d68d40f0eaccd4afa18cc6b0 /util/qemu-thread-win32.c | |
| parent | 220222a0fecf0fbd9f49633abef552dd019ab9cd (diff) | |
| download | focaccia-qemu-484108293d94d80acd5a2f4332eaea5e2605947a.tar.gz focaccia-qemu-484108293d94d80acd5a2f4332eaea5e2605947a.zip | |
qcow2: Force preallocation with data-file-raw
Setting the qcow2 data-file-raw bit means that you can ignore the qcow2 metadata when reading from the external data file. It does not mean that you have to ignore it, though. Therefore, the data read must be the same regardless of whether you interpret the metadata or whether you ignore it, and thus the L1/L2 tables must all be present and give a 1:1 mapping. This patch changes 244's output: First, the qcow2 file is larger right after creation, because of metadata preallocation. Second, the qemu-img map output changes: Everything that was not explicitly discarded or zeroed is now a data area. Signed-off-by: Max Reitz <mreitz@redhat.com> Message-Id: <20210326145509.163455-2-mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
Diffstat (limited to 'util/qemu-thread-win32.c')
0 files changed, 0 insertions, 0 deletions