linux-kernel - Re: [PATCH v5 02/19] KVM: Reinstall old memslots if arch preparation fails

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Message-ID: <20200205220822.GE387680@xz-x1>
Date:   Wed, 5 Feb 2020 17:08:22 -0500
From:   Peter Xu <peterx@...hat.com>
To:     Sean Christopherson <sean.j.christopherson@...el.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Paul Mackerras <paulus@...abs.org>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
        David Hildenbrand <david@...hat.com>,
        Cornelia Huck <cohuck@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, Marc Zyngier <maz@...nel.org>,
        James Morse <james.morse@....com>,
        Julien Thierry <julien.thierry.kdev@...il.com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        linux-mips@...r.kernel.org, kvm@...r.kernel.org,
        kvm-ppc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        kvmarm@...ts.cs.columbia.edu, linux-kernel@...r.kernel.org,
        Christoffer Dall <christoffer.dall@....com>,
        Philippe Mathieu-Daudé <f4bug@...at.org>
Subject: Re: [PATCH v5 02/19] KVM: Reinstall old memslots if arch preparation
 fails

On Tue, Jan 21, 2020 at 02:31:40PM -0800, Sean Christopherson wrote:
> Reinstall the old memslots if preparing the new memory region fails
> after invalidating a to-be-{re}moved memslot.
> 
> Remove the superfluous 'old_memslots' variable so that it's somewhat
> clear that the error handling path needs to free the unused memslots,
> not simply the 'old' memslots.
> 
> Fixes: bc6678a33d9b9 ("KVM: introduce kvm->srcu and convert kvm_set_memory_region to SRCU update")
> Reviewed-by: Christoffer Dall <christoffer.dall@....com>
> Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>

Reviewed-by: Peter Xu <peterx@...hat.com>

-- 
Peter Xu