Joerg Roedel wrote:
sp->spt is allocated using mmu_memory_cache_alloc(), which zeros the page. How can the assertion fail?
In the code I see (current kvm-git) mmu_memory_cache_alloc() does zero
nothing. It takes the page from the preallocated pool and returns it.
The pool itself is filled with mmu_topup_memory_caches() which calls
mmu_topup_memory_cache_page() to fill the mmu_page_cache (from which the
sp->spt page is allocated later). And the mmu_topup_memory_cache_page()
function calls alloc_page() and does not zero the result. This let the
assertion trigger.
Right, I was looking at the 2.6.29 tree. The patch is correct (and the
others look good as well). As usual, I'd like Marcelo to take a look as
well.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
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