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From: Avi Kivity <avi@redhat.com>
To: kvm@vger.kernel.org, Marcelo Tosatti <mtosatti@redhat.com>
Subject: [PATCH] KVM: Use kmalloc() instead of vmalloc() for KVM_[GS]ET_MSR
Date: Fri, 23 Jul 2010 09:02:14 +0300	[thread overview]
Message-ID: <1279864934-3237-1-git-send-email-avi@redhat.com> (raw)

We don't need more than a page, and vmalloc() is slower (much
slower recently due to a regression).

Signed-off-by: Avi Kivity <avi@redhat.com>
---
 arch/x86/kvm/x86.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 84bfb51..76fbc32 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1626,7 +1626,7 @@ static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
 
 	r = -ENOMEM;
 	size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;
-	entries = vmalloc(size);
+	entries = kmalloc(size, GFP_KERNEL);
 	if (!entries)
 		goto out;
 
@@ -1645,7 +1645,7 @@ static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
 	r = n;
 
 out_free:
-	vfree(entries);
+	kfree(entries);
 out:
 	return r;
 }
-- 
1.7.1


                 reply	other threads:[~2010-07-23  6:02 UTC|newest]

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