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Revision 14b98fda

ID14b98fdaf3422fef19718033be9eca7e0b776a26

Added by Charlie Shepherd over 10 years ago

COW: Speed up writes

Process a whole sector's worth of COW bits by reading a sector, setting
the bits after skipping any already set bits, then writing it out again.
Make sure we only flush once before writing metadata, and only if we
need to write metadata.

Signed-off-by: Charlie Shepherd <>
Signed-off-by: Stefan Hajnoczi <>

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