On Fri, 2011-03-25 at 01:43 -0700, Michel Lespinasse wrote:
> +PAGEFLAG(Young, young)
> +
> +PAGEFLAG(Idle, idle)
> +
> +static inline void set_page_young(struct page *page)
> +{
> + if (!PageYoung(page))
> + SetPageYoung(page);
> +}
> +
> +static inline void clear_page_idle(struct page *page)
> +{
> + if (PageIdle(page))
> + ClearPageIdle(page);
> +}
Is it time for a CONFIG_X86_32_STRUCT_PAGE_IS_NOW_A_BLOATED_BIG config
option? If folks want these kinds of features, then they need to suck
it up and make their 'struct page' 36 bytes. Any of these new page
flags features could:
config EXTENDED_PAGE_FLAGS
depends on 64BIT || X86_32_STRUCT_PAGE_IS_NOW_A_BLOATED_BIG
config KSTALED
depends on EXTENDED_PAGE_FLAGS
And then we can wrap the "enum pageflags" entries for them in #ifdefs,
along with making page->flags a u64 when
X86_32_STRUCT_PAGE_IS_NOW_A_BLOATED_BIG is set.
-- Dave
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