From: Mingwei Zhang <mizhang@google.com>
To: Sean Christopherson <seanjc@google.com>
Cc: Ben Gardon <bgardon@google.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
kvm <kvm@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>,
Jing Zhang <jingzhangos@google.com>
Subject: Re: [PATCH v2 3/3] KVM: x86/mmu: Add detailed page size stats
Date: Thu, 29 Jul 2021 12:02:38 -0700 [thread overview]
Message-ID: <CAL715WJMnMaFZ8XmsXWNEEHft0JsKi+MUqLARTf+C7D5s3kEKw@mail.gmail.com> (raw)
In-Reply-To: <YQL3SlI5XGVxqlvB@google.com>
On Thu, Jul 29, 2021 at 11:45 AM Sean Christopherson <seanjc@google.com> wrote:
>
> On Mon, Jul 26, 2021, Ben Gardon wrote:
> > On Mon, Jul 26, 2021 at 10:54 AM Mingwei Zhang <mizhang@google.com> wrote:
> > > diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h
> > > index 83e6c6965f1e..ad5638815311 100644
> > > --- a/arch/x86/kvm/mmu.h
> > > +++ b/arch/x86/kvm/mmu.h
> > > @@ -240,4 +240,6 @@ static inline bool kvm_memslots_have_rmaps(struct kvm *kvm)
> > > return smp_load_acquire(&kvm->arch.memslots_have_rmaps);
> > > }
> > >
> > > +void kvm_update_page_stats(struct kvm *kvm, int level, int count);
> > > +
> > > #endif
> > > diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
> > > index 442cc554ebd6..7e0fc760739b 100644
> > > --- a/arch/x86/kvm/mmu/mmu.c
> > > +++ b/arch/x86/kvm/mmu/mmu.c
> > > @@ -588,16 +588,22 @@ static bool mmu_spte_update(u64 *sptep, u64 new_spte)
> > > return flush;
> > > }
> > >
> > > +void kvm_update_page_stats(struct kvm *kvm, int level, int count)
> > > +{
> > > + atomic64_add(count, &kvm->stat.page_stats.pages[level - 1]);
> > > +}
>
> This can be static inline in the header. Ignoring prolog+RET, it's four instructions,
> and two of those are sign extending input params.
will do.It is really nice to see that this big function has been
finally shrinked to a single-line routine.
next prev parent reply other threads:[~2021-07-29 19:02 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-26 17:53 [PATCH v2 0/3] Add detailed page size stats in KVM stats Mingwei Zhang
2021-07-26 17:53 ` [PATCH v2 1/3] KVM: x86/mmu: Remove redundant spte present check in mmu_set_spte Mingwei Zhang
2021-07-26 20:23 ` Ben Gardon
2021-07-29 18:16 ` Sean Christopherson
2021-07-26 17:53 ` [PATCH v2 2/3] KVM: x86/mmu: Avoid collision with !PRESENT SPTEs in TDP MMU lpage stats Mingwei Zhang
2021-07-26 21:02 ` Ben Gardon
2021-07-29 18:34 ` Sean Christopherson
2021-07-29 19:01 ` Mingwei Zhang
2021-07-26 17:53 ` [PATCH v2 3/3] KVM: x86/mmu: Add detailed page size stats Mingwei Zhang
2021-07-26 20:41 ` Ben Gardon
2021-07-26 21:06 ` Ben Gardon
2021-07-29 18:45 ` Sean Christopherson
2021-07-29 19:02 ` Mingwei Zhang [this message]
2021-07-27 15:36 ` David Matlack
2021-07-29 6:24 ` Mingwei Zhang
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CAL715WJMnMaFZ8XmsXWNEEHft0JsKi+MUqLARTf+C7D5s3kEKw@mail.gmail.com \
--to=mizhang@google.com \
--cc=bgardon@google.com \
--cc=jingzhangos@google.com \
--cc=jmattson@google.com \
--cc=joro@8bytes.org \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=pbonzini@redhat.com \
--cc=seanjc@google.com \
--cc=vkuznets@redhat.com \
--cc=wanpengli@tencent.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).