linux-kernel - [PATCH 5.4 092/222] mm: khugepaged: add trace status description for SCAN_PAGE_HAS

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Date:   Wed, 22 Jan 2020 10:27:58 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Yang Shi <yang.shi@...ux.alibaba.com>,
        Song Liu <songliubraving@...com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Anshuman Khandual <anshuman.khandual@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [PATCH 5.4 092/222] mm: khugepaged: add trace status description for SCAN_PAGE_HAS_PRIVATE

From: Yang Shi <yang.shi@...ux.alibaba.com>

commit 554913f600b45d73de12ad58c1ac7baa0f22a703 upstream.

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@...ux.alibaba.com>
Cc: Song Liu <songliubraving@...com>
Cc: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Cc: Anshuman Khandual <anshuman.khandual@....com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 include/trace/events/huge_memory.h |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- 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