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mm, thp: convert from optimistic swapin collapsing to conservative

Bläddra i källkod 
To detect whether khugepaged swapin is worthwhile, this patch checks the
amount of young pages.  There should be at least half of HPAGE_PMD_NR to
swapin.

Link: http://lkml.kernel.org/r/1468109451-1615-1-git-send-email-ebru.akagunduz@gmail.com
Signed-off-by: Ebru Akagunduz <ebru.akagunduz@gmail.com>
Suggested-by: Minchan Kim <minchan@kernel.org>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: David Rientjes <rientjes@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Boaz Harrosh <boaz@plexistor.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ebru Akagunduz
2016-07-26 15:26:46 -07:00
committad av Linus Torvalds
förälder 47f863ea22
incheckning 0db501f7a3
2 ändrade filer med 34 tillägg och 23 borttagningar
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19
include/trace/events/huge_memory.h
Visa fil

@@ -13,7 +13,7 @@
EM( SCAN_EXCEED_NONE_PTE, "exceed_none_pte") \
EM( SCAN_PTE_NON_PRESENT, "pte_non_present") \
EM( SCAN_PAGE_RO, "no_writable_page") \
EM( SCAN_NO_REFERENCED_PAGE, "no_referenced_page") \
EM( SCAN_LACK_REFERENCED_PAGE, "lack_referenced_page") \
EM( SCAN_PAGE_NULL, "page_null") \
EM( SCAN_SCAN_ABORT, "scan_aborted") \
EM( SCAN_PAGE_COUNT, "not_suitable_page_count") \
@@ -47,7 +47,7 @@ SCAN_STATUS
TRACE_EVENT(mm_khugepaged_scan_pmd,
TP_PROTO(struct mm_struct *mm, struct page *page, bool writable,
bool referenced, int none_or_zero, int status, int unmapped),
int referenced, int none_or_zero, int status, int unmapped),
TP_ARGS(mm, page, writable, referenced, none_or_zero, status, unmapped),
@@ -55,7 +55,7 @@ TRACE_EVENT(mm_khugepaged_scan_pmd,
__field(struct mm_struct *, mm)
__field(unsigned long, pfn)
__field(bool, writable)
__field(bool, referenced)
__field(int, referenced)
__field(int, none_or_zero)
__field(int, status)
__field(int, unmapped)
@@ -108,14 +108,14 @@ TRACE_EVENT(mm_collapse_huge_page,
TRACE_EVENT(mm_collapse_huge_page_isolate,
TP_PROTO(struct page *page, int none_or_zero,
bool referenced, bool writable, int status),
int referenced, bool writable, int status),
TP_ARGS(page, none_or_zero, referenced, writable, status),
TP_STRUCT__entry(
__field(unsigned long, pfn)
__field(int, none_or_zero)
__field(bool, referenced)
__field(int, referenced)
__field(bool, writable)
__field(int, status)
),
@@ -138,25 +138,28 @@ TRACE_EVENT(mm_collapse_huge_page_isolate,
TRACE_EVENT(mm_collapse_huge_page_swapin,
TP_PROTO(struct mm_struct *mm, int swapped_in, int ret),
TP_PROTO(struct mm_struct *mm, int swapped_in, int referenced, int ret),
TP_ARGS(mm, swapped_in, ret),
TP_ARGS(mm, swapped_in, referenced, ret),
TP_STRUCT__entry(
__field(struct mm_struct *, mm)
__field(int, swapped_in)
__field(int, referenced)
__field(int, ret)
),
TP_fast_assign(
__entry->mm = mm;
__entry->swapped_in = swapped_in;
__entry->referenced = referenced;
__entry->ret = ret;
),
TP_printk("mm=%p, swapped_in=%d, ret=%d",
TP_printk("mm=%p, swapped_in=%d, referenced=%d, ret=%d",
__entry->mm,
__entry->swapped_in,
__entry->referenced,
__entry->ret)
);