[v2,04/47] kvm: mmu: dynamically allocate the x86-mmu shrinker

Commit Message

Qi Zheng July 24, 2023, 9:43 a.m. UTC

Use new APIs to dynamically allocate the x86-mmu shrinker.

Signed-off-by: Qi Zheng <[e-mail]>
---
 arch/x86/kvm/mmu/mmu.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

Comments

Muchun Song July 25, 2023, 9:16 a.m. UTC | #1

> On Jul 24, 2023, at 17:43, Qi Zheng <[e-mail]> wrote:
> 
> Use new APIs to dynamically allocate the x86-mmu shrinker.
> 
> Signed-off-by: Qi Zheng <[e-mail]>

Reviewed-by: Muchun Song <[e-mail]>

Thanks.

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Patch

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index ec169f5c7dce..ab405e0a8954 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -6847,11 +6847,7 @@  static unsigned long mmu_shrink_count(struct shrinker *shrink,
 	return percpu_counter_read_positive(&kvm_total_used_mmu_pages);
 }
 
-static struct shrinker mmu_shrinker = {
-	.count_objects = mmu_shrink_count,
-	.scan_objects = mmu_shrink_scan,
-	.seeks = DEFAULT_SEEKS * 10,
-};
+static struct shrinker *mmu_shrinker;
 
 static void mmu_destroy_caches(void)
 {
@@ -6984,10 +6980,16 @@  int kvm_mmu_vendor_module_init(void)
 	if (percpu_counter_init(&kvm_total_used_mmu_pages, 0, GFP_KERNEL))
 		goto out;
 
-	ret = register_shrinker(&mmu_shrinker, "x86-mmu");
-	if (ret)
+	mmu_shrinker = shrinker_alloc(0, "x86-mmu");
+	if (!mmu_shrinker)
 		goto out_shrinker;
 
+	mmu_shrinker->count_objects = mmu_shrink_count;
+	mmu_shrinker->scan_objects = mmu_shrink_scan;
+	mmu_shrinker->seeks = DEFAULT_SEEKS * 10;
+
+	shrinker_register(mmu_shrinker);
+
 	return 0;
 
 out_shrinker:
@@ -7009,7 +7011,7 @@  void kvm_mmu_vendor_module_exit(void)
 {
 	mmu_destroy_caches();
 	percpu_counter_destroy(&kvm_total_used_mmu_pages);
-	unregister_shrinker(&mmu_shrinker);
+	shrinker_unregister(mmu_shrinker);
 }
 
 /*