On Thu, Oct 08, 2015 at 02:35:50PM +0800, Hui Zhu wrote: > This patch add PG_movable to mark a page as movable. > And when system call migrate function, it will call the interfaces isolate, > put and migrate to control it. > > There is a patch for page migrate interface in LKML. But for zsmalloc, > it is too deep inside the file system. So I add another one. > > Signed-off-by: Hui Zhu <[email protected]> > --- > include/linux/mm_types.h | 6 ++++++ > include/linux/page-flags.h | 3 +++ > mm/compaction.c | 6 ++++++ > mm/debug.c | 1 + > mm/migrate.c | 17 +++++++++++++---- > mm/vmscan.c | 2 +- > 6 files changed, 30 insertions(+), 5 deletions(-) > > diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h > index 3d6baa7..132afb0 100644 > --- a/include/linux/mm_types.h > +++ b/include/linux/mm_types.h > @@ -12,6 +12,7 @@ > #include <linux/cpumask.h> > #include <linux/uprobes.h> > #include <linux/page-flags-layout.h> > +#include <linux/migrate_mode.h> > #include <asm/page.h> > #include <asm/mmu.h> > > @@ -196,6 +197,11 @@ struct page { > #ifdef LAST_CPUPID_NOT_IN_PAGE_FLAGS > int _last_cpupid; > #endif > + > + int (*isolate)(struct page *page); > + void (*put)(struct page *page); > + int (*migrate)(struct page *page, struct page *newpage, int force, > + enum migrate_mode mode); > }
That's no-go. We are not going to add three pointers to struct page. It would cost ~0.5% of system memory. NAK. -- Kirill A. Shutemov -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
