For reproducibility, it is best to zero pages before they are used. There are hidden assumptions on memory being zeroed (by BIOS/KVM), which might be broken at any given moment. The full argument appears in the first patch commit log. Following the first patch that zeros the memory, the rest of the patch-set removes redundant zeroing do to the additional zeroing. This patch-set is only tested on x86. v2->v3: * Typos [Alexandru] v1->v2: * Change alloc_pages() as well * Remove redundant page zeroing [Andrew] Nadav Amit (4): lib/alloc_page: Zero allocated pages x86: Remove redundant page zeroing lib: Remove redundant page zeroing arm: Remove redundant page zeroing lib/alloc_page.c | 4 ++++ lib/arm/asm/pgtable.h | 2 -- lib/arm/mmu.c | 1 - lib/arm64/asm/pgtable.h | 1 - lib/virtio-mmio.c | 1 - lib/x86/intel-iommu.c | 5 ----- x86/eventinj.c | 1 - x86/hyperv_connections.c | 4 ---- x86/vmx.c | 10 ---------- x86/vmx_tests.c | 11 ----------- 10 files changed, 4 insertions(+), 36 deletions(-) -- 2.17.1
