We keep track of several kernel memory stats (total kernel memory, page tables, stack, vmalloc, etc) on multiple levels (global, per-node, per-memcg, etc). These stats give insights to users to how much memory is used by the kernel and for what purposes. Currently, memory used by kvm for its page tables is not accounted in any of those kernel memory stats. This patch series accounts the memory pages used by KVM for page tables in those stats in a new NR_SECONDARY_PAGETABLE stat. The riscv and mips patches are not tested due to lack of resources. Feel free to test or drop them. Changes in V3: - Added NR_SECONDARY_PAGETABLE instead of piggybacking on NR_PAGETABLE stats. Changes in V2: - Added accounting stats for other archs than x86. - Changed locations in the code where x86 KVM page table stats were accounted based on suggestions from Sean Christopherson. Yosry Ahmed (6): mm: add NR_SECONDARY_PAGETABLE stat KVM: mmu: add a helper to account page table pages used by KVM. KVM: x86/mmu: count KVM page table pages in pagetable stats KVM: arm64/mmu: count KVM page table pages in pagetable stats KVM: riscv/mmu: count KVM page table pages in pagetable stats KVM: mips/mmu: count KVM page table pages in pagetable stats arch/arm64/kernel/image-vars.h | 3 ++ arch/arm64/kvm/hyp/pgtable.c | 50 +++++++++++++++++++++------------- arch/mips/kvm/mips.c | 1 + arch/mips/kvm/mmu.c | 9 +++++- arch/riscv/kvm/mmu.c | 26 +++++++++++++----- arch/x86/kvm/mmu/mmu.c | 16 +++++++++-- arch/x86/kvm/mmu/tdp_mmu.c | 16 +++++++++-- drivers/base/node.c | 2 ++ fs/proc/meminfo.c | 2 ++ include/linux/kvm_host.h | 9 ++++++ include/linux/mmzone.h | 1 + mm/memcontrol.c | 1 + mm/page_alloc.c | 6 +++- mm/vmstat.c | 1 + 14 files changed, 111 insertions(+), 32 deletions(-) -- 2.36.0.rc2.479.g8af0fa9b8e-goog
