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authorKonstantin Khlebnikov <k.khlebnikov@samsung.com>2014-10-09 15:29:32 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-10-09 22:26:01 -0400
commit09316c09dde33aae14f34489d9e3d243ec0d5938 (patch)
tree3238cf34be33d587a93db64a9f934f8b1c69cfb8 /include/uapi
parent9d1ba8056474a208ed9efb7e58cd014795d9f818 (diff)
mm/balloon_compaction: add vmstat counters and kpageflags bit
Always mark pages with PageBalloon even if balloon compaction is disabled and expose this mark in /proc/kpageflags as KPF_BALLOON. Also this patch adds three counters into /proc/vmstat: "balloon_inflate", "balloon_deflate" and "balloon_migrate". They accumulate balloon activity. Current size of balloon is (balloon_inflate - balloon_deflate) pages. All generic balloon code now gathered under option CONFIG_MEMORY_BALLOON. It should be selected by ballooning driver which wants use this feature. Currently virtio-balloon is the only user. 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>
Diffstat (limited to 'include/uapi')
-rw-r--r--include/uapi/linux/kernel-page-flags.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/kernel-page-flags.h b/include/uapi/linux/kernel-page-flags.h
index 5116a0e48172..2f96d233c980 100644
--- a/include/uapi/linux/kernel-page-flags.h
+++ b/include/uapi/linux/kernel-page-flags.h
@@ -31,6 +31,7 @@
#define KPF_KSM 21
#define KPF_THP 22
+#define KPF_BALLOON 23
#endif /* _UAPILINUX_KERNEL_PAGE_FLAGS_H */