linux-kernel - Re: [PATCH v3 4/7] KVM: X86: Introduce mmu_rmaps

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <YQmVsSKIPooRQakQ@t490s>
Date:   Tue, 3 Aug 2021 15:14:57 -0400
From:   Peter Xu <peterx@...hat.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Maxim Levitsky <mlevitsk@...hat.com>
Subject: Re: [PATCH v3 4/7] KVM: X86: Introduce mmu_rmaps_stat per-vm debugfs
 file

On Mon, Aug 02, 2021 at 05:25:12PM +0200, Paolo Bonzini wrote:
> On 31/07/21 00:04, Peter Xu wrote:
> > Use this file to dump rmap statistic information.  The statistic is done by
> > calculating the rmap count and the result is log-2-based.
> > 
> > An example output of this looks like (idle 6GB guest, right after boot linux):
> > 
> > Rmap_Count:     0       1       2-3     4-7     8-15    16-31   32-63   64-127  128-255 256-511 512-1023
> > Level=4K:       3086676 53045   12330   1272    502     121     76      2       0       0       0
> > Level=2M:       5947    231     0       0       0       0       0       0       0       0       0
> > Level=1G:       32      0       0       0       0       0       0       0       0       0       0
> > 
> > Signed-off-by: Peter Xu <peterx@...hat.com>
> > ---
> >   arch/x86/kvm/x86.c | 113 +++++++++++++++++++++++++++++++++++++++++++++
> >   1 file changed, 113 insertions(+)
> 
> This should be in debugfs.c, meaning that the kvm_mmu_slot_lpages() must be
> in a header.  I think mmu.h should do, let me take a look and I can post
> myself a v4 of these debugfs parts.

Thanks, Paolo!

-- 
Peter Xu