[Xen-devel] [PATCH 0 of 3] Enable domain checkpointing via xm save --checkpoint

[Brendan Cully <brendan@xxxxxxxxx>]

The attached patches create a --checkpoint flag for xm save:

xc_domain_resume lets the caller alert the guest that it is being
resumed. Callers should not do this unless they know the guest
supports the operation.

When xend wants to resume a domain, it checks for the suspend_cancel
feature in the elfnotes it has recorded from domain build or
resume. If the flag is present, it simply lets the guest handle
resuming, otherwise it tears down and rebuilds the domain and lets the
guest act as if it is resuming in a new domain.

A new suspend_cancel feature is added to the kernel 'features'
elfnote.

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