linux-kernel - Re: [PATCH] KVM: x86/mmu: Release the pfn in handle_abnormal

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Message-ID: <Y1K2toQAAj90+ATK@google.com>
Date:   Fri, 21 Oct 2022 15:11:50 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Fuad Tabba <tabba@...gle.com>
Cc:     kvm@...r.kernel.org, pbonzini@...hat.com, tglx@...utronix.de,
        mingo@...hat.com, bp@...en8.de, dave.hansen@...ux.intel.com,
        hpa@...or.com, will@...nel.org, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] KVM: x86/mmu: Release the pfn in handle_abnormal_pfn()
 error path

On Fri, Oct 21, 2022, Fuad Tabba wrote:
> Currently in case of error it returns without releasing the pfn
> faulted in earlier.

handle_abnormal_pfn() returns something other than RET_PF_CONTINUE if and only if
there was no pfn to fault-in, i.e. it only handles error and no-slot pfns.