Hi, all
I want to reduce the checkpoint size of a VM by memory exclusion. I try
to find out all the free pages by reference count at VMM-level, As they declared
that:
/* Page is on a free list: ((count_info & PGC_count_mask) == 0). */
, in struct page_info which is defined in /xen/include/asm-x86/mm.h, but
unfortunately, all the pages in a idle VM accords with this condition. I prints
out the reference count of all memory pages, all of them are equal to or
bigger than 2. Anyone can tell me the reason? and how can I find out the free
pages in a guest OS?
Best regards
haikun liu
2009-07-16
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