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mm/balloon_compaction: remove balloon mapping and flag AS_BALLOON_MAP

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Now ballooned pages are detected using PageBalloon().  Fake mapping is no
longer required.  This patch links ballooned pages to balloon device using
field page->private instead of page->mapping.  Also this patch embeds
balloon_dev_info directly into struct virtio_balloon.

Signed-off-by: Konstantin Khlebnikov <k.khlebnikov@samsung.com>
Cc: Rafael Aquini <aquini@redhat.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Konstantin Khlebnikov
2014-10-09 15:29:29 -07:00
committed by Linus Torvalds
parent d6d86c0a7f
commit 9d1ba80564
4 changed files with 39 additions and 206 deletions
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18
include/linux/pagemap.h
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@@ -24,8 +24,7 @@ enum mapping_flags {
AS_ENOSPC = __GFP_BITS_SHIFT + 1, /* ENOSPC on async write */
AS_MM_ALL_LOCKS = __GFP_BITS_SHIFT + 2, /* under mm_take_all_locks() */
AS_UNEVICTABLE = __GFP_BITS_SHIFT + 3, /* e.g., ramdisk, SHM_LOCK */
AS_BALLOON_MAP = __GFP_BITS_SHIFT + 4, /* balloon page special map */
AS_EXITING = __GFP_BITS_SHIFT + 5, /* final truncate in progress */
AS_EXITING = __GFP_BITS_SHIFT + 4, /* final truncate in progress */
};
static inline void mapping_set_error(struct address_space *mapping, int error)
@@ -55,21 +54,6 @@ static inline int mapping_unevictable(struct address_space *mapping)
return !!mapping;
}
static inline void mapping_set_balloon(struct address_space *mapping)
{
set_bit(AS_BALLOON_MAP, &mapping->flags);
}
static inline void mapping_clear_balloon(struct address_space *mapping)
{
clear_bit(AS_BALLOON_MAP, &mapping->flags);
}
static inline int mapping_balloon(struct address_space *mapping)
{
return mapping && test_bit(AS_BALLOON_MAP, &mapping->flags);
}
static inline void mapping_set_exiting(struct address_space *mapping)
{
set_bit(AS_EXITING, &mapping->flags);