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Subject: Re: [PATCH 00/14] KVM: x86/mmu: Huge page fixes, cleanup, and DAX
To: Sean Christopherson <sean.j.christopherson@intel.com>,
 Paolo Bonzini <pbonzini@redhat.com>
References: <20200108202448.9669-1-sean.j.christopherson@intel.com>
From: Barret Rhoden <brho@google.com>
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Date: Thu, 9 Jan 2020 14:47:41 -0500
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CC: Paul Mackerras <paulus@ozlabs.org>, Vitaly Kuznetsov <vkuznets@redhat.com>, Wanpeng Li <wanpengli@tencent.com>, Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>, Dave Hansen <dave.hansen@linux.intel.com>, Andy Lutomirski <luto@kernel.org>, Peter Zijlstra <peterz@infradead.org>, Andrew Morton <akpm@linux-foundation.org>, Marc Zyngier <maz@kernel.org>, James Morse <james.morse@arm.com>, Julien Thierry <julien.thierry.kdev@gmail.com>, Suzuki K Poulose <suzuki.poulose@arm.com>, kvm-ppc@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, syzbot+c9d1fb51ac9d0d10c39d@syzkaller.appspotmail.com, Andrea Arcangeli <aarcange@redhat.com>, David Hildenbrand <david@redhat.com>, Jason Zeng <jason.zeng@intel.com>, Liran Alon <liran.alon@oracle.com>, linux-nvdimm <linux-nvdimm@lists.01.org>
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Hi -

On 1/8/20 3:24 PM, Sean Christopherson wrote:
> This series is a mix of bug fixes, cleanup and new support in KVM's
> handling of huge pages.  The series initially stemmed from a syzkaller
> bug report[1], which is fixed by patch 02, "mm: thp: KVM: Explicitly
> check for THP when populating secondary MMU".
> 
> While investigating options for fixing the syzkaller bug, I realized KVM
> could reuse the approach from Barret's series to enable huge pages for DAX
> mappings in KVM[2] for all types of huge mappings, i.e. walk the host page
> tables instead of querying metadata (patches 05 - 09).

Thanks, Sean.  I tested this patch series out, and it works for me. 
(Huge KVM mappings of a DAX file, etc.).

Thanks,

Barret


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