linux-kernel - Re: [PATCH v6 4/6] kvm, mem-hotplug: Reload L1' apic access page on migration in vcpu_enter

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Date:	Wed, 17 Sep 2014 11:14:54 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Tang Chen <tangchen@...fujitsu.com>, gleb@...nel.org,
	mtosatti@...hat.com, nadav.amit@...il.com, jan.kiszka@....de
CC:	kvm@...r.kernel.org, laijs@...fujitsu.com,
	isimatu.yasuaki@...fujitsu.com, guz.fnst@...fujitsu.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 4/6] kvm, mem-hotplug: Reload L1' apic access page
 on migration in vcpu_enter_guest().

Il 17/09/2014 10:13, Tang Chen ha scritto:
> 
> 
>> Please add a new function kvm_arch_mmu_notifier_invalidate_page, and
>> call it outside the mmu_lock.
> 
> Then I think we need a macro to control the calling of this arch function
> since other architectures do not have it.

You can add an inline function that does nothing.  There are other examples.

>> kvm_reload_apic_access_page need not be in virt/kvm/kvm_main.c, either.
> 
> Since kvm_reload_apic_access_page() only calls make_all_cpus_request(),
> and make_all_cpus_request() is static, I'd like to make it non-static, rename
> it to kvm_make_all_cpus_request() and call it directly in kvm_arch_mmu_notifier_invalidate_page().
> we don't need kvm_reload_apic_access_page() actually.

Ok.

Paolo
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