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xen-devel
Re: [Xen-devel] Re: [PATCH 0 of 6] dm-userspace xen integrationpatches
IP> What data structure / format are you using for storing the CoW
IP> data?
Currently, I've got a really simple format that just forms an identity
mapping by using a bitmap. The first block (or blocks) on the
destination is reserved for metadata. After that, if bit X is set,
then block X is located in block X+1 in the cow space. It's fast, it
doesn't waste space, and it's easy to predict a mapping and flush it
later to avoid metadata reservations.
--
Dan Smith
IBM Linux Technology Center
Open Hypervisor Team
email: danms@xxxxxxxxxx
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