From: Jan Kiszka <jan.kiszka@web.de>
To: Avi Kivity <avi@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>,
kvm@vger.kernel.org, Gleb Natapov <gleb@redhat.com>
Subject: Re: [PATCH 7/8] KVM: Optimize kvm_read_cr[04]_bits()
Date: Sun, 07 Feb 2010 13:33:49 +0100 [thread overview]
Message-ID: <4B6EB32D.3060804@web.de> (raw)
In-Reply-To: <4B6EAC88.7000306@redhat.com>
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Avi Kivity wrote:
> On 02/05/2010 10:26 AM, Jan Kiszka wrote:
>> Avi Kivity wrote:
>>
>>> 'mask' is always a constant, so we can check whether it includes a
>>> bit that
>>> might be owned by the guest very cheaply, and avoid the decache
>>> call. Saves
>>> a few hundred bytes of module text.
>>>
>> -no-kvm-irqchip -smp 2 is broken for my Linux guests since this commit.
>> Their user space applications receive #UD and things fall apart.
>>
>>
>
> Does 2c8232fc help?
>
Nope, unfortunately.
Jan
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next prev parent reply other threads:[~2010-02-07 12:33 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-21 13:31 [PATCH 0/8] cr0/cr4/efer/fpu miscellaneous bits Avi Kivity
2010-01-21 13:31 ` [PATCH 1/8] KVM: Allow kvm_load_guest_fpu() even when !vcpu->fpu_active Avi Kivity
2010-01-21 13:31 ` [PATCH 2/8] KVM: Drop kvm_{load,put}_guest_fpu() exports Avi Kivity
2010-01-21 13:31 ` [PATCH 3/8] KVM: Activate fpu on clts Avi Kivity
2010-01-23 18:56 ` Marcelo Tosatti
2010-01-24 7:20 ` Avi Kivity
2010-02-02 8:16 ` Paolo Bonzini
2010-02-03 10:23 ` Gleb Natapov
2010-02-04 13:05 ` Avi Kivity
2010-02-04 13:11 ` Gleb Natapov
2010-02-04 17:56 ` Avi Kivity
2010-02-07 12:25 ` Avi Kivity
2010-01-21 13:31 ` [PATCH 4/8] KVM: Add a helper for checking if the guest is in protected mode Avi Kivity
2010-01-21 13:31 ` [PATCH 5/8] KVM: Move cr0/cr4/efer related helpers to x86.h Avi Kivity
2010-01-21 13:31 ` [PATCH 6/8] KVM: Rename vcpu->shadow_efer to efer Avi Kivity
2010-01-21 13:31 ` [PATCH 7/8] KVM: Optimize kvm_read_cr[04]_bits() Avi Kivity
2010-02-05 8:26 ` Jan Kiszka
2010-02-07 12:05 ` Avi Kivity
2010-02-07 12:33 ` Jan Kiszka [this message]
2010-02-07 12:37 ` Avi Kivity
2010-02-07 13:20 ` Jan Kiszka
2010-01-21 13:31 ` [PATCH 8/8] KVM: trace guest fpu loads and unloads Avi Kivity
2010-01-23 19:02 ` [PATCH 0/8] cr0/cr4/efer/fpu miscellaneous bits Marcelo Tosatti
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