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authorMichal Hocko <mhocko@suse.com>2017-02-23 02:44:21 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-02-23 03:41:29 +0300
commit1265e3a69f1ea97357536773d48c92a409e01eaf (patch)
tree43ff45112693719b8015a07e9329cf9c24fed030 /include/trace/events/vmscan.h
parent9d998b4f1e39abd69441d29a1ef3250514479267 (diff)
downloadlinux-1265e3a69f1ea97357536773d48c92a409e01eaf.tar.xz
mm, vmscan: show the number of skipped pages in mm_vmscan_lru_isolate
mm_vmscan_lru_isolate shows the number of requested, scanned and taken pages. This is mostly OK but on 32b systems the number of scanned pages is quite misleading because it includes both the scanned and skipped pages. Moreover the skipped part is scaled based on the number of taken pages. Let's report the exact numbers without any additional logic and add the number of skipped pages. This should make the reported data much more easier to interpret. Link: http://lkml.kernel.org/r/20170104101942.4860-4-mhocko@kernel.org Signed-off-by: Michal Hocko <mhocko@suse.com> Acked-by: Minchan Kim <minchan@kernel.org> Acked-by: Mel Gorman <mgorman@suse.de> Acked-by: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/trace/events/vmscan.h')
-rw-r--r--include/trace/events/vmscan.h8
1 files changed, 6 insertions, 2 deletions
diff --git a/include/trace/events/vmscan.h b/include/trace/events/vmscan.h
index c295d8f1b67a..340b3c4ef4a8 100644
--- a/include/trace/events/vmscan.h
+++ b/include/trace/events/vmscan.h
@@ -274,17 +274,19 @@ TRACE_EVENT(mm_vmscan_lru_isolate,
int order,
unsigned long nr_requested,
unsigned long nr_scanned,
+ unsigned long nr_skipped,
unsigned long nr_taken,
isolate_mode_t isolate_mode,
int file),
- TP_ARGS(classzone_idx, order, nr_requested, nr_scanned, nr_taken, isolate_mode, file),
+ TP_ARGS(classzone_idx, order, nr_requested, nr_scanned, nr_skipped, nr_taken, isolate_mode, file),
TP_STRUCT__entry(
__field(int, classzone_idx)
__field(int, order)
__field(unsigned long, nr_requested)
__field(unsigned long, nr_scanned)
+ __field(unsigned long, nr_skipped)
__field(unsigned long, nr_taken)
__field(isolate_mode_t, isolate_mode)
__field(int, file)
@@ -295,17 +297,19 @@ TRACE_EVENT(mm_vmscan_lru_isolate,
__entry->order = order;
__entry->nr_requested = nr_requested;
__entry->nr_scanned = nr_scanned;
+ __entry->nr_skipped = nr_skipped;
__entry->nr_taken = nr_taken;
__entry->isolate_mode = isolate_mode;
__entry->file = file;
),
- TP_printk("isolate_mode=%d classzone=%d order=%d nr_requested=%lu nr_scanned=%lu nr_taken=%lu file=%d",
+ TP_printk("isolate_mode=%d classzone=%d order=%d nr_requested=%lu nr_scanned=%lu nr_skipped=%lu nr_taken=%lu file=%d",
__entry->isolate_mode,
__entry->classzone_idx,
__entry->order,
__entry->nr_requested,
__entry->nr_scanned,
+ __entry->nr_skipped,
__entry->nr_taken,
__entry->file)
);