From: Marcelo Tosatti <mtosatti@redhat.com>
To: Gleb Natapov <gleb@redhat.com>
Cc: avi@redhat.com, kvm@vger.kernel.org
Subject: Re: [PATCHv2] KVM: emulator: do not needlesly sync registers from emulator ctxt to vcpu
Date: Thu, 14 Apr 2011 04:08:56 -0300 [thread overview]
Message-ID: <20110414070856.GB14370@amt.cnet> (raw)
In-Reply-To: <20110331100641.GL7766@redhat.com>
On Thu, Mar 31, 2011 at 12:06:41PM +0200, Gleb Natapov wrote:
> Currently we sync registers back and forth before/after exiting
> to userspace for IO, but during IO device model shouldn't need to
> read/write the registers, so we can as well skip those sync points. The
> only exaception is broken vmware backdor interface. The new code sync
> registers content during IO only if registers are read from/written to
> by userspace in the middle of the IO operation and this almost never
> happens in practise.
>
> Signed-off-by: Gleb Natapov <gleb@redhat.com>
> ---
> v1->v2
> - rebased onto see emulation patchset.
Applied, thanks.
prev parent reply other threads:[~2011-04-14 7:32 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-31 10:06 [PATCHv2] KVM: emulator: do not needlesly sync registers from emulator ctxt to vcpu Gleb Natapov
2011-04-14 7:08 ` Marcelo Tosatti [this message]
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