Re: [RFC, PATCH 19/22] x86/mm: Implement free_encrypt_page()

[Kirill A. Shutemov]

On Mon, Mar 05, 2018 at 11:00:00AM -0800, Dave Hansen wrote:
> On 03/05/2018 08:26 AM, Kirill A. Shutemov wrote:
> > +void free_encrypt_page(struct page *page, int keyid, unsigned int order)
> > +{
> > +	int i;
> > +	void *v;
> > +
> > +	for (i = 0; i < (1 << order); i++) {
> > +		v = kmap_atomic_keyid(page, keyid + i);
> > +		/* See comment in prep_encrypt_page() */
> > +		clflush_cache_range(v, PAGE_SIZE);
> > +		kunmap_atomic(v);
> > +	}
> > +}
> 
> Did you miss adding the call sites for this?

No. It is in "mm, rmap: Free encrypted pages once mapcount drops to zero".
But the call is optimized out since anon_vma_encrypted() is always false
so far.

-- 
 Kirill A. Shutemov