linux-kernel - Re: [RFC, PATCH 13/22] mm, rmap: Free encrypted pages once mapcount drops to zero

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Message-ID: <d1faf309-837b-d385-4d0a-c840fdab8b36@intel.com>
Date:   Tue, 6 Mar 2018 06:59:04 -0800
From:   Dave Hansen <dave.hansen@...el.com>
To:     "Kirill A. Shutemov" <kirill@...temov.name>
Cc:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Kai Huang <kai.huang@...ux.intel.com>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [RFC, PATCH 13/22] mm, rmap: Free encrypted pages once mapcount
 drops to zero

On 03/06/2018 12:27 AM, Kirill A. Shutemov wrote:
> +	anon_vma = page_anon_vma(page);
> +	if (anon_vma_encrypted(anon_vma)) {
> +		int keyid = anon_vma_keyid(anon_vma);
> +		free_encrypt_page(page, keyid, compound_order(page));
> +	}
>  }

So, just double-checking: free_encrypt_page() neither "frees and
encrypts the page"" nor "free an encrypted page"?

That seems a bit suboptimal. :)