From: Nadav Amit <nadav.amit@gmail.com>
To: Tang Chen <tangchen@cn.fujitsu.com>, Gleb Natapov <gleb@kernel.org>
Cc: mtosatti@redhat.com, kvm@vger.kernel.org, laijs@cn.fujitsu.com,
isimatu.yasuaki@jp.fujitsu.com, guz.fnst@cn.fujitsu.com,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 4/4] kvm, mem-hotplug: Update apic access page when it is migrated.
Date: Mon, 07 Jul 2014 14:42:27 +0300 [thread overview]
Message-ID: <53BA87A3.5020205@gmail.com> (raw)
In-Reply-To: <53BA6DD3.9040400@cn.fujitsu.com>
Tang,
Running some (unrelated) tests I see that KVM does not handle APIC base
relocation correctly. When the base is changed, kvm_lapic_set_base just
changes lapic->base_address without taking further action (i.e.,
modifying the VMCS apic address in VMX).
This patch follows KVM bad behavior by using the constant
VMX_APIC_ACCESS_PAGE_ADDR instead of lapic->base_address.
Anyhow, I didn't see anything that would make my life (in fixing the
lapic base issue) too difficult. Yet, feel free in making it more
"fix-friendly".
Thanks,
Nadav
On 7/7/14, 12:52 PM, Tang Chen wrote:
> Hi Gleb,
>
> The guest hang problem has been solved.
>
> When mmu_notifier is called, I set VMCS APIC_ACCESS_ADDR to the new value
> instead of setting it to 0. And only update kvm->arch.apic_access_page in
> the next ept violation.
>
> The guest is running well now.
>
> I'll post the new patches tomorrow. ;)
>
> Thanks.
>
next prev parent reply other threads:[~2014-07-07 11:42 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-02 9:00 [PATCH 0/4] kvm, mem-hotplug: Do not pin ept identity pagetable and apic access page Tang Chen
2014-07-02 9:00 ` [PATCH 1/4] kvm: Add gfn_to_page_no_pin() Tang Chen
2014-07-02 9:00 ` [PATCH 2/4] kvm: Add macro VMX_APIC_ACCESS_PAGE_ADDR Tang Chen
2014-07-02 16:24 ` Gleb Natapov
2014-07-03 1:19 ` Tang Chen
2014-07-02 9:00 ` [PATCH 3/4] kvm, memory-hotplug: Update ept identity pagetable when it is migrated Tang Chen
2014-07-02 16:34 ` Gleb Natapov
2014-07-03 1:19 ` Tang Chen
2014-07-04 2:36 ` Tang Chen
2014-07-04 9:49 ` Gleb Natapov
2014-07-02 9:00 ` [PATCH 4/4] kvm, mem-hotplug: Update apic access page " Tang Chen
2014-07-03 13:55 ` Gleb Natapov
2014-07-04 2:18 ` Tang Chen
2014-07-04 2:18 ` Tang Chen
2014-07-04 10:13 ` Gleb Natapov
2014-07-07 6:17 ` Tang Chen
2014-07-07 9:52 ` Tang Chen
2014-07-07 11:42 ` Nadav Amit [this message]
2014-07-07 11:54 ` Gleb Natapov
2014-07-07 12:10 ` Nadav Amit
2014-07-07 12:15 ` Gleb Natapov
2014-07-08 1:44 ` Tang Chen
2014-07-08 6:46 ` Nadav Amit
2014-07-07 10:35 ` Wanpeng Li
2014-07-08 9:40 ` Tang Chen
2014-07-03 1:17 ` [PATCH 0/4] kvm, mem-hotplug: Do not pin ept identity pagetable and apic access page Tang Chen
2014-07-03 6:04 ` Gleb Natapov
2014-07-04 6:41 ` Tang Chen
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