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

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Message-Id: <20230724094354.90817-5-zhengqi.arch@bytedance.com>
Date: Mon, 24 Jul 2023 17:43:11 +0800
From: Qi Zheng <zhengqi.arch@...edance.com>
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	Qi Zheng <zhengqi.arch@...edance.com>
Subject: [PATCH v2 04/47] kvm: mmu: dynamically allocate the x86-mmu shrinker

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

Signed-off-by: Qi Zheng <zhengqi.arch@...edance.com>
---
 arch/x86/kvm/mmu/mmu.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

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);
 }
 
 /*
-- 
2.30.2