diff mbox

[Yakkety,SRU] UBUNTU: SAUCE: KVM: PPC: Book3S: Ratelimit copy data failure error messages

Message ID 1487953712-96491-1-git-send-email-seth.forshee@canonical.com
State New
Headers show

Commit Message

Seth Forshee Feb. 24, 2017, 4:28 p.m. UTC 
From: Vipin K Parashar <vipin@linux.vnet.ibm.com>

BugLink: http://bugs.launchpad.net/bugs/1667416

kvm_ppc_mmu_book3s_32/64 xlat() logs "KVM can't copy data" error
upon failing to copy user data to kernel space. This floods kernel
log once such fails occur in short time period. Ratelimit this
error to avoid flooding kernel logs upon copy data failures.

Signed-off-by: Vipin K Parashar <vipin@linux.vnet.ibm.com>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
---
 arch/powerpc/kvm/book3s_32_mmu.c | 3 ++-
 arch/powerpc/kvm/book3s_64_mmu.c | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

Comments

Stefan Bader Feb. 28, 2017, 1:34 p.m. UTC | #1
Brad Figg March 1, 2017, 12:22 a.m. UTC | #2 
Applied to the master-next branch of Yakkety.
diff mbox

Patch

diff --git a/arch/powerpc/kvm/book3s_32_mmu.c b/arch/powerpc/kvm/book3s_32_mmu.c
index a2eb6d354a57..1992676c7a94 100644
--- a/arch/powerpc/kvm/book3s_32_mmu.c
+++ b/arch/powerpc/kvm/book3s_32_mmu.c
@@ -224,7 +224,8 @@  static int kvmppc_mmu_book3s_32_xlate_pte(struct kvm_vcpu *vcpu, gva_t eaddr,
 	ptem = kvmppc_mmu_book3s_32_get_ptem(sre, eaddr, primary);
 
 	if(copy_from_user(pteg, (void __user *)ptegp, sizeof(pteg))) {
-		printk(KERN_ERR "KVM: Can't copy data from 0x%lx!\n", ptegp);
+		printk_ratelimited(KERN_ERR
+			"KVM: Can't copy data from 0x%lx!\n", ptegp);
 		goto no_page_found;
 	}
 
diff --git a/arch/powerpc/kvm/book3s_64_mmu.c b/arch/powerpc/kvm/book3s_64_mmu.c
index b9131aa1aedf..70153578131a 100644
--- a/arch/powerpc/kvm/book3s_64_mmu.c
+++ b/arch/powerpc/kvm/book3s_64_mmu.c
@@ -265,7 +265,8 @@  do_second:
 		goto no_page_found;
 
 	if(copy_from_user(pteg, (void __user *)ptegp, sizeof(pteg))) {
-		printk(KERN_ERR "KVM can't copy data from 0x%lx!\n", ptegp);
+		printk_ratelimited(KERN_ERR
+			"KVM: Can't copy data from 0x%lx!\n", ptegp);
 		goto no_page_found;
 	}