From 09316c09dde33aae14f34489d9e3d243ec0d5938 Mon Sep 17 00:00:00 2001 From: Konstantin Khlebnikov Date: Thu, 9 Oct 2014 15:29:32 -0700 Subject: 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 Cc: Rafael Aquini Cc: Andrey Ryabinin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/proc/page.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'fs/proc/page.c') diff --git a/fs/proc/page.c b/fs/proc/page.c index e647c55275d9..1e3187da1fed 100644 --- a/fs/proc/page.c +++ b/fs/proc/page.c @@ -133,6 +133,9 @@ u64 stable_page_flags(struct page *page) if (PageBuddy(page)) u |= 1 << KPF_BUDDY; + if (PageBalloon(page)) + u |= 1 << KPF_BALLOON; + u |= kpf_copy_bit(k, KPF_LOCKED, PG_locked); u |= kpf_copy_bit(k, KPF_SLAB, PG_slab); -- cgit v1.2.3