linux-kernel - Re: [RFC PATCH v4 8/9] KVM: selftests: Adapt vm_userspace_mem_region

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Message-ID: <20210312115228.p5l26ukkn2xfwevz@kamzik.brq.redhat.com>
Date:   Fri, 12 Mar 2021 12:52:28 +0100
From:   Andrew Jones <drjones@...hat.com>
To:     Yanan Wang <wangyanan55@...wei.com>
Cc:     kvm@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>,
        Ben Gardon <bgardon@...gle.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Peter Xu <peterx@...hat.com>, Marc Zyngier <maz@...nel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Arnd Bergmann <arnd@...db.de>,
        Michael Kerrisk <mtk.manpages@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        wanghaibin.wang@...wei.com, yezengruan@...wei.com,
        yuzenghui@...wei.com
Subject: Re: [RFC PATCH v4 8/9] KVM: selftests: Adapt
 vm_userspace_mem_region_add to new helpers

On Tue, Mar 02, 2021 at 08:57:50PM +0800, Yanan Wang wrote:
> With VM_MEM_SRC_ANONYMOUS_THP specified in vm_userspace_mem_region_add(),
> we have to get the transparent hugepage size for HVA alignment. With the
> new helpers, we can use get_backing_src_pagesz() to check whether THP is
> configured and then get the exact configured hugepage size.
> 
> As different architectures may have different THP page sizes configured,
> this can get the accurate THP page sizes on any platform.
> 
> Signed-off-by: Yanan Wang <wangyanan55@...wei.com>
> Reviewed-by: Ben Gardon <bgardon@...gle.com>
> ---
>  tools/testing/selftests/kvm/lib/kvm_util.c | 28 +++++++---------------
>  1 file changed, 9 insertions(+), 19 deletions(-)
>

Reviewed-by: Andrew Jones <drjones@...hat.com>