Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b5a33a75720c03d58d8281a72b45ffd214f00ed7
Commit: b5a33a75720c03d58d8281a72b45ffd214f00ed7
Parent: 417726a3fbecb2092f1054bbaee87bc442b05ef3
Author: Avi Kivity <[EMAIL PROTECTED]>
AuthorDate: Sun Apr 15 16:31:09 2007 +0300
Committer: Avi Kivity <[EMAIL PROTECTED]>
CommitDate: Thu May 3 10:52:29 2007 +0300
KVM: Use slab caches to allocate mmu data structures
Better leak detection, statistics, memory use, speed -- goodness all
around.
Signed-off-by: Avi Kivity <[EMAIL PROTECTED]>
---
drivers/kvm/kvm.h | 3 +++
drivers/kvm/kvm_main.c | 7 +++++++
drivers/kvm/mmu.c | 39 +++++++++++++++++++++++++++++++++++----
3 files changed, 45 insertions(+), 4 deletions(-)
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h
index fceeb84..b9c318a 100644
--- a/drivers/kvm/kvm.h
+++ b/drivers/kvm/kvm.h
@@ -433,6 +433,9 @@ extern struct kvm_arch_ops *kvm_arch_ops;
int kvm_init_arch(struct kvm_arch_ops *ops, struct module *module);
void kvm_exit_arch(void);
+int kvm_mmu_module_init(void);
+void kvm_mmu_module_exit(void);
+
void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
int kvm_mmu_create(struct kvm_vcpu *vcpu);
int kvm_mmu_setup(struct kvm_vcpu *vcpu);
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index 0b30631..ab4dbd7 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -3063,6 +3063,10 @@ static __init int kvm_init(void)
static struct page *bad_page;
int r;
+ r = kvm_mmu_module_init();
+ if (r)
+ goto out4;
+
r = register_filesystem(&kvm_fs_type);
if (r)
goto out3;
@@ -3091,6 +3095,8 @@ out:
out2:
unregister_filesystem(&kvm_fs_type);
out3:
+ kvm_mmu_module_exit();
+out4:
return r;
}
@@ -3100,6 +3106,7 @@ static __exit void kvm_exit(void)
__free_page(pfn_to_page(bad_page_address >> PAGE_SHIFT));
mntput(kvmfs_mnt);
unregister_filesystem(&kvm_fs_type);
+ kvm_mmu_module_exit();
}
module_init(kvm_init)
diff --git a/drivers/kvm/mmu.c b/drivers/kvm/mmu.c
index 9ff7480..a368ea8 100644
--- a/drivers/kvm/mmu.c
+++ b/drivers/kvm/mmu.c
@@ -159,6 +159,9 @@ struct kvm_rmap_desc {
struct kvm_rmap_desc *more;
};
+static struct kmem_cache *pte_chain_cache;
+static struct kmem_cache *rmap_desc_cache;
+
static int is_write_protection(struct kvm_vcpu *vcpu)
{
return vcpu->cr0 & CR0_WP_MASK;
@@ -196,14 +199,14 @@ static int is_rmap_pte(u64 pte)
}
static int mmu_topup_memory_cache(struct kvm_mmu_memory_cache *cache,
- size_t objsize, int min)
+ struct kmem_cache *base_cache, int min)
{
void *obj;
if (cache->nobjs >= min)
return 0;
while (cache->nobjs < ARRAY_SIZE(cache->objects)) {
- obj = kzalloc(objsize, GFP_NOWAIT);
+ obj = kmem_cache_zalloc(base_cache, GFP_NOWAIT);
if (!obj)
return -ENOMEM;
cache->objects[cache->nobjs++] = obj;
@@ -222,11 +225,11 @@ static int mmu_topup_memory_caches(struct kvm_vcpu *vcpu)
int r;
r = mmu_topup_memory_cache(&vcpu->mmu_pte_chain_cache,
- sizeof(struct kvm_pte_chain), 4);
+ pte_chain_cache, 4);
if (r)
goto out;
r = mmu_topup_memory_cache(&vcpu->mmu_rmap_desc_cache,
- sizeof(struct kvm_rmap_desc), 1);
+ rmap_desc_cache, 1);
out:
return r;
}
@@ -1333,6 +1336,34 @@ void kvm_mmu_zap_all(struct kvm_vcpu *vcpu)
init_kvm_mmu(vcpu);
}
+void kvm_mmu_module_exit(void)
+{
+ if (pte_chain_cache)
+ kmem_cache_destroy(pte_chain_cache);
+ if (rmap_desc_cache)
+ kmem_cache_destroy(rmap_desc_cache);
+}
+
+int kvm_mmu_module_init(void)
+{
+ pte_chain_cache = kmem_cache_create("kvm_pte_chain",
+ sizeof(struct kvm_pte_chain),
+ 0, 0, NULL, NULL);
+ if (!pte_chain_cache)
+ goto nomem;
+ rmap_desc_cache = kmem_cache_create("kvm_rmap_desc",
+ sizeof(struct kvm_rmap_desc),
+ 0, 0, NULL, NULL);
+ if (!rmap_desc_cache)
+ goto nomem;
+
+ return 0;
+
+nomem:
+ kvm_mmu_module_exit();
+ return -ENOMEM;
+}
+
#ifdef AUDIT
static const char *audit_msg;
-
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