linux-kernel - Re: [Patch v4 03/18] KVM: x86/mmu: Track count of pages in KVM MMU page caches globally

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Message-ID: <CAHVum0f9JBE9vL4FW1_iH7mq6xjGQWG3J6TZ2Z-rRMQM8GocVg@mail.gmail.com>
Date:   Thu, 9 Mar 2023 10:19:35 -0800
From:   Vipin Sharma <vipinsh@...gle.com>
To:     Zhi Wang <zhi.wang.linux@...il.com>
Cc:     seanjc@...gle.com, pbonzini@...hat.com, bgardon@...gle.com,
        dmatlack@...gle.com, jmattson@...gle.com, mizhang@...gle.com,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [Patch v4 03/18] KVM: x86/mmu: Track count of pages in KVM MMU
 page caches globally

On Thu, Mar 9, 2023 at 7:37 AM Zhi Wang <zhi.wang.linux@...il.com> wrote:
>
> On Mon,  6 Mar 2023 14:41:12 -0800
> Vipin Sharma <vipinsh@...gle.com> wrote:
> >  /*
> > @@ -6994,3 +7048,11 @@ void kvm_mmu_pre_destroy_vm(struct kvm *kvm)
> >       if (kvm->arch.nx_huge_page_recovery_thread)
> >               kthread_stop(kvm->arch.nx_huge_page_recovery_thread);
> >  }
> > +
> > +void *mmu_sp_memory_cache_alloc(struct kvm_mmu_memory_cache *shadow_page_cache,
> > +                             bool count_allocation)
>
> Is it necessary to have the control of count_allocation in every call of
> mmu_sp_memory_cache_alloc() instead of taking
> shadow_page_cache->count_shadow_page_allocation directly?
>
 You have found in patch 7 that this is cleaned up.