From: Dave Hansen <dave@xxxxxxxxxxxxxxxxxx>
[PATCH 2/4 v2] kvm: rename x86 kvm->arch.n_alloc_mmu_pages
Again, I think this is a poor choice of names. This value truly
means, "the number of pages which _may_ be allocated". But,
reading the value, "n_alloc_mmu_pages", I'm unable to think of
anything it should mean other than "the number of allocated mmu
pages", which is dead wrong.
It's really the high watermark, so let's give it a name to match:
nr_max_mmu_pages. This change will make the next few patches
much more obvious and easy to read.
Signed-off-by: Dave Hansen <dave@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Tim Pepper <lnxninja@xxxxxxxxxxxxxxxxxx>
---
arch/x86/include/asm/kvm_host.h | 2 +-
arch/x86/kvm/mmu.c | 8 ++++----
arch/x86/kvm/x86.c | 2 +-
3 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 502e53f..f0f02cf 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -369,7 +369,7 @@ struct kvm_vcpu_arch {
struct kvm_arch {
unsigned int n_free_mmu_pages;
unsigned int n_requested_mmu_pages;
- unsigned int n_alloc_mmu_pages;
+ unsigned int n_max_mmu_pages;
atomic_t invlpg_counter;
struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
/*
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 3c15d10..02e414d 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1672,7 +1672,7 @@ void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages)
int used_pages;
LIST_HEAD(invalid_list);
- used_pages = kvm->arch.n_alloc_mmu_pages - kvm_mmu_available_pages(kvm);
+ used_pages = kvm->arch.n_max_mmu_pages - kvm_mmu_available_pages(kvm);
used_pages = max(0, used_pages);
/*
@@ -1697,9 +1697,9 @@ void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages)
}
else
kvm->arch.n_free_mmu_pages += kvm_nr_mmu_pages
- - kvm->arch.n_alloc_mmu_pages;
+ - kvm->arch.n_max_mmu_pages;
- kvm->arch.n_alloc_mmu_pages = kvm_nr_mmu_pages;
+ kvm->arch.n_max_mmu_pages = kvm_nr_mmu_pages;
}
static int kvm_mmu_unprotect_page(struct kvm *kvm, gfn_t gfn)
@@ -3119,7 +3119,7 @@ static int mmu_shrink(struct shrinker *shrink, int nr_to_scan, gfp_t gfp_mask)
idx = srcu_read_lock(&kvm->srcu);
spin_lock(&kvm->mmu_lock);
- npages = kvm->arch.n_alloc_mmu_pages -
+ npages = kvm->arch.n_max_mmu_pages -
kvm_mmu_available_pages(kvm);
cache_count += npages;
if (!kvm_freed && nr_to_scan > 0 && npages > 0) {
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 25f1907..9a1266d 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2759,7 +2759,7 @@ static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm,
static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm)
{
- return kvm->arch.n_alloc_mmu_pages;
+ return kvm->arch.n_max_mmu_pages;
}
static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
--
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