[PATCH 10/16] page-flags: define PG_swapbacked behavior on compound pages

From: Kirill A. Shutemov
Date: Thu Mar 19 2015 - 13:14:58 EST


PG_swapbacked is used for transparent huge pages. For head pages only.
Let's use NO_TAIL policy.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
---
include/linux/page-flags.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index be691551896b..d1d08508984d 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -290,9 +290,9 @@ PAGEFLAG(Foreign, foreign, NO_COMPOUND)

PAGEFLAG(Reserved, reserved, NO_COMPOUND)
__CLEARPAGEFLAG(Reserved, reserved, NO_COMPOUND)
-PAGEFLAG(SwapBacked, swapbacked, ANY)
- __CLEARPAGEFLAG(SwapBacked, swapbacked, ANY)
- __SETPAGEFLAG(SwapBacked, swapbacked, ANY)
+PAGEFLAG(SwapBacked, swapbacked, NO_TAIL)
+ __CLEARPAGEFLAG(SwapBacked, swapbacked, NO_TAIL)
+ __SETPAGEFLAG(SwapBacked, swapbacked, NO_TAIL)

/*
* Private page markings that may be used by the filesystem that owns the page
--
2.1.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/