[PATCHv2 12/28] thp, vmstats: add counters for huge file pages
From: Kirill A. Shutemov <hidden>
Date: 2016-02-11 14:23:29
Also in:
lkml
Subsystem:
memory management, memory management - core, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Linus Torvalds
THP_FILE_ALLOC: how many times huge page was allocated and put page cache. THP_FILE_MAPPED: how many times file huge page was mapped. Signed-off-by: Kirill A. Shutemov <redacted> --- include/linux/vm_event_item.h | 7 +++++++ mm/memory.c | 1 + mm/vmstat.c | 2 ++ 3 files changed, 10 insertions(+)
diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h
index b79e831006b0..8359022f6ea1 100644
--- a/include/linux/vm_event_item.h
+++ b/include/linux/vm_event_item.h@@ -69,6 +69,8 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, THP_FAULT_FALLBACK, THP_COLLAPSE_ALLOC, THP_COLLAPSE_ALLOC_FAILED, + THP_FILE_ALLOC, + THP_FILE_MAPPED, THP_SPLIT_PAGE, THP_SPLIT_PAGE_FAILED, THP_DEFERRED_SPLIT_PAGE,
@@ -99,4 +101,9 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, NR_VM_EVENT_ITEMS }; +#ifndef CONFIG_TRANSPARENT_HUGEPAGE +#define THP_FILE_ALLOC ({ BUILD_BUG(); 0; }) +#define THP_FILE_MAPPED ({ BUILD_BUG(); 0; }) +#endif + #endif /* VM_EVENT_ITEM_H_INCLUDED */
diff --git a/mm/memory.c b/mm/memory.c
index fb61e82bbb9a..6c98ed8e3c4a 100644
--- a/mm/memory.c
+++ b/mm/memory.c@@ -2874,6 +2874,7 @@ static int do_set_pmd(struct fault_env *fe, struct page *page) /* fault is handled */ ret = 0; + count_vm_event(THP_FILE_MAPPED); out: spin_unlock(fe->ptl); return ret;
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 801e6b18fb94..e69031a3b306 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c@@ -846,6 +846,8 @@ const char * const vmstat_text[] = { "thp_fault_fallback", "thp_collapse_alloc", "thp_collapse_alloc_failed", + "thp_file_alloc", + "thp_file_mapped", "thp_split_page", "thp_split_page_failed", "thp_deferred_split_page",
--
2.7.0
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