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Date: Fri, 07 Sep 2018 00:51:26 -0600 From: "Jan Beulich" <JBeulich@...e.com> To: "Marek Marczykowski" <marmarek@...isiblethingslab.com> Cc: "xen-devel" <xen-devel@...ts.xenproject.org>, "Boris Ostrovsky" <boris.ostrovsky@...cle.com>, "Juergen Gross" <jgross@...e.com>, <linux-kernel@...r.kernel.org> Subject: Re: [Xen-devel] [PATCH] xen/balloon: add runtime control for scrubbing ballooned out pages >>> On 06.09.18 at 17:33, <marmarek@...isiblethingslab.com> wrote: > --- a/include/xen/mem-reservation.h > +++ b/include/xen/mem-reservation.h > @@ -17,12 +17,17 @@ > > #include <xen/page.h> > > +#ifdef CONFIG_XEN_SCRUB_PAGES > +extern bool xen_scrub_pages; > + > static inline void xenmem_reservation_scrub_page(struct page *page) > { > -#ifdef CONFIG_XEN_SCRUB_PAGES > - clear_highpage(page); > -#endif > + if (xen_scrub_pages) > + clear_highpage(page); > } > +#else > +static inline void xenmem_reservation_scrub_page(struct page *page) { } > +#endif Wouldn't CONFIG_XEN_SCRUB_PAGES then better become CONFIG_XEN_SCRUB_PAGES_DEFAULT, with the value used as initializer of xen_scrub_pages? Jan
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