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4fabffc112
This updates the qcow2 specification to cover version 3. It contains the following changes: - Added compatible/incompatible/auto-clear feature bits plus an optional feature name table to allow useful error messages even if an older version doesn't know some feature at all. - Configurable refcount width. If you don't want to use internal snapshots, make refcounts one bit and save cache space and I/O. - Zero cluster flags. This allows discard even with a backing file that doesn't contain zeros. It is also useful for copy-on-read/image streaming, as you'll want to keep sparseness without accessing the remote image for an unallocated cluster all the time. - Fixed internal snapshot metadata to use 64 bit VM state size. You can't save a snapshot of a VM with >= 4 GB RAM today. - Extended internal snapshot metadata to contain the disk size, so that resizing images that have snapshots can be allowed in the future. Signed-off-by: Kevin Wolf <kwolf@redhat.com> |
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| .. | ||
| specs | ||
| blkverify.txt | ||
| bootindex.txt | ||
| ccid.txt | ||
| ich9-ehci-uhci.cfg | ||
| libcacard.txt | ||
| live-block-ops.txt | ||
| memory.txt | ||
| migration.txt | ||
| qapi-code-gen.txt | ||
| qdev-device-use.txt | ||
| tracing.txt | ||
| usb2.txt | ||
| writing-qmp-commands.txt | ||
| xen-save-devices-state.txt | ||