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844c6e0bbc
The guest memory is allocated through hugetlb. Huge page fault is triggered by writing a byte to the starting address for each huge page. In hugetlb_fault(), The physical pages are allocated and *clear*. So no need to erasing the memory again after hugetlb setup. This will bring about 130ms (changes with platform) latency for each 1G memory. Notice: this means we depends on kernel to erase the memory in huge page fault! Tracked-On: #7298 Signed-off-by: Conghui <conghui.chen@intel.com> Acked-by: Wang, Yu1 <yu1.wang@intel.com>