[PATCH v3 11/15] KVM: MMU: locklessly access shadow page under rcu protection

[Xiao Guangrong]

Use SLAB_DESTROY_BY_RCU to prevent the shadow page to be freed from the
slab, so that it can be locklessly accessed by holding rcu lock

Signed-off-by: Xiao Guangrong <xiaoguangrong@xxxxxxxxxxxxxxxxxx>
---
 arch/x86/kvm/mmu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 1bcc8c8..5b42858 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -4710,8 +4710,8 @@ int kvm_mmu_module_init(void)
 		goto nomem;
 
 	mmu_shadow_page_cache = kmem_cache_create("mmu_shadow_page_cache",
-						  PAGE_SIZE, PAGE_SIZE, 0,
-						  init_shadow_page_table);
+				   PAGE_SIZE, PAGE_SIZE, SLAB_DESTROY_BY_RCU,
+				   init_shadow_page_table);
 	if (!mmu_shadow_page_cache)
 		goto nomem;
 
-- 
1.8.1.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/