linux-kernel - [PATCH v1 3/6] mm/hwpoison: introduce MF_MSG

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Date:   Mon, 14 Jun 2021 11:12:09 +0900
From:   Naoya Horiguchi <nao.horiguchi@...il.com>
To:     linux-mm@...ck.org
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        David Hildenbrand <david@...hat.com>,
        Oscar Salvador <osalvador@...e.de>,
        Michal Hocko <mhocko@...e.com>,
        Ding Hui <dinghui@...gfor.com.cn>,
        Tony Luck <tony.luck@...el.com>,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
        Naoya Horiguchi <naoya.horiguchi@....com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v1 3/6] mm/hwpoison: introduce MF_MSG_PAGETABLE

From: Naoya Horiguchi <naoya.horiguchi@....com>

Page table pages could have some amount of share on system memory,
so define it for a separate page type message.

Signed-off-by: Naoya Horiguchi <naoya.horiguchi@....com>
---
 include/linux/mm.h      | 1 +
 include/ras/ras_event.h | 1 +
 mm/memory-failure.c     | 1 +
 3 files changed, 3 insertions(+)

diff --git v5.13-rc5/include/linux/mm.h v5.13-rc5_patched/include/linux/mm.h
index c274f75efcf9..45008654f695 100644
--- v5.13-rc5/include/linux/mm.h
+++ v5.13-rc5_patched/include/linux/mm.h
@@ -3103,6 +3103,7 @@ enum mf_action_page_type {
 	MF_MSG_KERNEL,
 	MF_MSG_KERNEL_HIGH_ORDER,
 	MF_MSG_SLAB,
+	MF_MSG_PAGETABLE,
 	MF_MSG_DIFFERENT_COMPOUND,
 	MF_MSG_POISONED_HUGE,
 	MF_MSG_HUGE,
diff --git v5.13-rc5/include/ras/ras_event.h v5.13-rc5_patched/include/ras/ras_event.h
index 0bdbc0d17d2f..2f459f6f87fb 100644
--- v5.13-rc5/include/ras/ras_event.h
+++ v5.13-rc5_patched/include/ras/ras_event.h
@@ -357,6 +357,7 @@ TRACE_EVENT(aer_event,
 	EM ( MF_MSG_KERNEL, "reserved kernel page" )			\
 	EM ( MF_MSG_KERNEL_HIGH_ORDER, "high-order kernel page" )	\
 	EM ( MF_MSG_SLAB, "kernel slab page" )				\
+	EM ( MF_MSG_PAGETABLE, "page table page page" )			\
 	EM ( MF_MSG_DIFFERENT_COMPOUND, "different compound page after locking" ) \
 	EM ( MF_MSG_POISONED_HUGE, "huge page already hardware poisoned" )	\
 	EM ( MF_MSG_HUGE, "huge page" )					\
diff --git v5.13-rc5/mm/memory-failure.c v5.13-rc5_patched/mm/memory-failure.c
index e7910386fc9c..30d6519ce203 100644
--- v5.13-rc5/mm/memory-failure.c
+++ v5.13-rc5_patched/mm/memory-failure.c
@@ -708,6 +708,7 @@ static const char * const action_page_types[] = {
 	[MF_MSG_KERNEL]			= "reserved kernel page",
 	[MF_MSG_KERNEL_HIGH_ORDER]	= "high-order kernel page",
 	[MF_MSG_SLAB]			= "kernel slab page",
+	[MF_MSG_PAGETABLE]		= "page table page",
 	[MF_MSG_DIFFERENT_COMPOUND]	= "different compound page after locking",
 	[MF_MSG_POISONED_HUGE]		= "huge page already hardware poisoned",
 	[MF_MSG_HUGE]			= "huge page",
-- 
2.25.1