lkml.org 
[lkml]   [2015]   [Sep]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCHv10 10/36] mm, vmstats: new THP splitting event
Date
The patch replaces THP_SPLIT with tree events: THP_SPLIT_PAGE,
THP_SPLIT_PAGE_FAILED and THP_SPLIT_PMD. It reflects the fact that we
are going to be able split PMD without the compound page and that
split_huge_page() can fail.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Christoph Lameter <cl@linux.com>
Tested-by: Sasha Levin <sasha.levin@oracle.com>
Tested-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Jerome Marchand <jmarchan@redhat.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
---
include/linux/vm_event_item.h | 4 +++-
mm/huge_memory.c | 2 +-
mm/vmstat.c | 4 +++-
3 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h
index 2b1cef88b827..3261bfe2156a 100644
--- a/include/linux/vm_event_item.h
+++ b/include/linux/vm_event_item.h
@@ -69,7 +69,9 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
THP_FAULT_FALLBACK,
THP_COLLAPSE_ALLOC,
THP_COLLAPSE_ALLOC_FAILED,
- THP_SPLIT,
+ THP_SPLIT_PAGE,
+ THP_SPLIT_PAGE_FAILED,
+ THP_SPLIT_PMD,
THP_ZERO_PAGE_ALLOC,
THP_ZERO_PAGE_ALLOC_FAILED,
#endif
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index fa51f1b64e3c..ac1948397d6f 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -2029,7 +2029,7 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)

BUG_ON(!PageSwapBacked(page));
__split_huge_page(page, anon_vma, list);
- count_vm_event(THP_SPLIT);
+ count_vm_event(THP_SPLIT_PAGE);

BUG_ON(PageCompound(page));
out_unlock:
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 1fd0886a389f..e1c87425fe11 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -821,7 +821,9 @@ const char * const vmstat_text[] = {
"thp_fault_fallback",
"thp_collapse_alloc",
"thp_collapse_alloc_failed",
- "thp_split",
+ "thp_split_page",
+ "thp_split_page_failed",
+ "thp_split_pmd",
"thp_zero_page_alloc",
"thp_zero_page_alloc_failed",
#endif
--
2.5.0


\
 
 \ /
  Last update: 2015-09-03 17:41    [W:0.193 / U:35.916 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site