search for: sptis

...your latest email, you ask "Do we really need to reserve one snapshot page for each smfn at first and retain it until the HVM domain is destroyed?" Well I don''t. I simply pre-allocate a pool of SPTI''s. It can be quite a large pool but certainly not one-SPTI per MFN. SPTIs are allocated on demand (when a guest page needs to be shadowed) and, when the pool runs low, the LRU SPTs are torn down and their SPTIs recycled. Currently I allocate about 5% of system memory for this purpose (this includes the SPT, its snapshot and the backlink pages) and, with that reasonable...

Hi, Robert, I found out another confusing code snippet: in void xi_invl_mfn(struct domain *d, unsigned long mfn) if (ext && pfn < ext->large_page_aligned_size) According to the code, it should be if (ext && (pfn>>SPT_ENTRIES_ORDER) < ext->large_page_aligned_size) If I made any mistake, please point it out.