mm: khugepaged: add trace status description for SCAN_PAGE_HAS_PRIVATE

Commit 99cb0dbd47a1 ("mm,thp: add read-only THP support for (non-shmem)
FS") introduced a new khugepaged scan result: SCAN_PAGE_HAS_PRIVATE, but
the corresponding description for trace events were not added.

Link: http://lkml.kernel.org/r/1574793844-2914-1-git-send-email-yang.shi@linux.alibaba.com
Fixes: 99cb0dbd47a1 ("mm,thp: add read-only THP support for (non-shmem) FS")
Signed-off-by: Yang Shi <yang.shi@linux.alibaba.com>
Cc: Song Liu <songliubraving@fb.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/trace/events/huge_memory.h b/include/trace/events/huge_memory.h
index dd4db33..d82a0f4 100644 (file)
--- a/include/trace/events/huge_memory.h
+++ b/include/trace/events/huge_memory.h
@@ -31,7 +31,8 @@
        EM( SCAN_ALLOC_HUGE_PAGE_FAIL,  "alloc_huge_page_failed")       \
        EM( SCAN_CGROUP_CHARGE_FAIL,    "ccgroup_charge_failed")        \
        EM( SCAN_EXCEED_SWAP_PTE,       "exceed_swap_pte")              \
-       EMe(SCAN_TRUNCATED,             "truncated")                    \
+       EM( SCAN_TRUNCATED,             "truncated")                    \
+       EMe(SCAN_PAGE_HAS_PRIVATE,      "page_has_private")             \
 
 #undef EM
 #undef EMe