From: Marcelo Tosatti <mtosatti@redhat.com>
To: Avi Kivity <avi@redhat.com>
Cc: kvm@vger.kernel.org
Subject: Re: [PATCH 0/2] Optimize ds/es reload
Date: Wed, 16 May 2012 16:04:03 -0300 [thread overview]
Message-ID: <20120516190403.GA25004@amt.cnet> (raw)
In-Reply-To: <1336928004-6366-1-git-send-email-avi@redhat.com>
On Sun, May 13, 2012 at 07:53:22PM +0300, Avi Kivity wrote:
> The lightweight exit path needlessly reloads %ds and %es (and clobbers the
> user supplied values as well, a minor ABI bug). This patchset fixes the bug
> and moves the reload to the heavyweight exit path (potentially skipping it
> completely on x86_64), reducing the vmexit cost by about 70 cycles.
>
> Avi Kivity (2):
> KVM: VMX: Fix %ds/%es clobber
> KVM: VMX: Optimize %ds, %es reload
>
> arch/x86/kvm/vmx.c | 32 +++++++++++++++++++++++++++++++-
> 1 file changed, 31 insertions(+), 1 deletion(-)
Applied, thanks.
prev parent reply other threads:[~2012-05-16 19:08 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-13 16:53 [PATCH 0/2] Optimize ds/es reload Avi Kivity
2012-05-13 16:53 ` [PATCH 1/2] KVM: VMX: Fix %ds/%es clobber Avi Kivity
2012-05-13 16:53 ` [PATCH 2/2] KVM: VMX: Optimize %ds, %es reload Avi Kivity
2012-05-16 19:04 ` Marcelo Tosatti [this message]
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