Xen devel - Sep 2006 - [PATCH] XENOPROF: add a new hypercall operation for allocating and sharing xenoprof buffer with domain

This patch modifies the XENOPROF_init operation in xenoprof hypercall,
removing the code for allocating and sharing the xenoprof buffer. The
patch creates a new xenoprof hypercall operation for the buffer
operations: XENOPROF_get_buffer.
This is the first step to enable dynamic mapping and unmapping of the
xenoprof buffer. This is necessary for doing passive profiling of
domains which have oprofile module loaded or builtin the kernel. Today
loading oprofile in a domain prevent it to be profiled in passive mode
even if the module is later unloaded.

Since this change modifies the hypercall interface, it would be nice if
it could make the 3.0.3 release to avoid breaking compatibility.

Thanks

Renato




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