linux-kernel - Re: [PATCH v3] kvm: Fix page ageing bugs

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Message-ID: <CAJu=L59=QGpWWW=ghPkFyhParXB4jMepQROiQ+5ZBh235Dmepg@mail.gmail.com>
Date:	Mon, 22 Sep 2014 14:54:45 -0700
From:	Andres Lagar-Cavilla <andreslc@...gle.com>
To:	Paolo Bonzini <pbonzini@...hat.com>
Cc:	Gleb Natapov <gleb@...nel.org>, Radim Krcmar <rkrcmar@...hat.com>,
	Rik van Riel <riel@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Peter Feiner <pfeiner@...gle.com>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Andres Lagar-Cavilla <andreslc@...ogle.com>
Subject: Re: [PATCH v3] kvm: Fix page ageing bugs

On Mon, Sep 22, 2014 at 2:48 PM, Paolo Bonzini <pbonzini@...hat.com> wrote:
> Il 22/09/2014 22:26, Andres Lagar-Cavilla ha scritto:
>> +             __entry->gfn            = gfn;
>> +             __entry->hva            = ((gfn - slot->base_gfn) >>
>
> This must be <<.

Correct, thanks.

>
>> +                                         PAGE_SHIFT) + slot->userspace_addr;
>
>> +             /*
>> +              * No need for _notify because we're called within an
>> +              * mmu_notifier_invalidate_range_ {start|end} scope.
>> +              */
>
> Why "called within"?  It is try_to_unmap_cluster itself that calls
> mmu_notifier_invalidate_range_*, so "we're within an
> mmu_notifier_invalidate_range_start/end scope" sounds better, and it's
> also what you use in the commit message.

Also correct. V4...
Andres

>
> Paolo



-- 
Andres Lagar-Cavilla | Google Kernel Team | andreslc@...gle.com
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