This is convenient when tracking down why the skip count is high because it'll show what classzone kswapd woke up at and what zones are being isolated. Signed-off-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx> --- include/trace/events/vmscan.h | 28 ++++++++++++++++++---------- mm/vmscan.c | 4 ++-- 2 files changed, 20 insertions(+), 12 deletions(-) diff --git a/include/trace/events/vmscan.h b/include/trace/events/vmscan.h index 897f1aa1ee5f..3d242fb8910a 100644 --- a/include/trace/events/vmscan.h +++ b/include/trace/events/vmscan.h @@ -55,21 +55,23 @@ TRACE_EVENT(mm_vmscan_kswapd_sleep, TRACE_EVENT(mm_vmscan_kswapd_wake, - TP_PROTO(int nid, int order), + TP_PROTO(int nid, int zid, int order), - TP_ARGS(nid, order), + TP_ARGS(nid, zid, order), TP_STRUCT__entry( __field( int, nid ) + __field( int, zid ) __field( int, order ) ), TP_fast_assign( __entry->nid = nid; + __entry->zid = zid; __entry->order = order; ), - TP_printk("nid=%d order=%d", __entry->nid, __entry->order) + TP_printk("nid=%d zid=%d order=%d", __entry->nid, __entry->zid, __entry->order) ); TRACE_EVENT(mm_vmscan_wakeup_kswapd, @@ -266,16 +268,18 @@ TRACE_EVENT(mm_shrink_slab_end, DECLARE_EVENT_CLASS(mm_vmscan_lru_isolate_template, - TP_PROTO(int order, + TP_PROTO(int classzone_idx, + int order, unsigned long nr_requested, unsigned long nr_scanned, unsigned long nr_taken, isolate_mode_t isolate_mode, int file), - TP_ARGS(order, nr_requested, nr_scanned, nr_taken, isolate_mode, file), + TP_ARGS(classzone_idx, order, nr_requested, nr_scanned, 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) @@ -285,6 +289,7 @@ DECLARE_EVENT_CLASS(mm_vmscan_lru_isolate_template, ), TP_fast_assign( + __entry->classzone_idx = classzone_idx; __entry->order = order; __entry->nr_requested = nr_requested; __entry->nr_scanned = nr_scanned; @@ -293,8 +298,9 @@ DECLARE_EVENT_CLASS(mm_vmscan_lru_isolate_template, __entry->file = file; ), - TP_printk("isolate_mode=%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_taken=%lu file=%d", __entry->isolate_mode, + __entry->classzone_idx, __entry->order, __entry->nr_requested, __entry->nr_scanned, @@ -304,27 +310,29 @@ DECLARE_EVENT_CLASS(mm_vmscan_lru_isolate_template, DEFINE_EVENT(mm_vmscan_lru_isolate_template, mm_vmscan_lru_isolate, - TP_PROTO(int order, + TP_PROTO(int classzone_idx, + int order, unsigned long nr_requested, unsigned long nr_scanned, unsigned long nr_taken, isolate_mode_t isolate_mode, int file), - TP_ARGS(order, nr_requested, nr_scanned, nr_taken, isolate_mode, file) + TP_ARGS(classzone_idx, order, nr_requested, nr_scanned, nr_taken, isolate_mode, file) ); DEFINE_EVENT(mm_vmscan_lru_isolate_template, mm_vmscan_memcg_isolate, - TP_PROTO(int order, + TP_PROTO(int classzone_idx, + int order, unsigned long nr_requested, unsigned long nr_scanned, unsigned long nr_taken, isolate_mode_t isolate_mode, int file), - TP_ARGS(order, nr_requested, nr_scanned, nr_taken, isolate_mode, file) + TP_ARGS(classzone_idx, order, nr_requested, nr_scanned, nr_taken, isolate_mode, file) ); diff --git a/mm/vmscan.c b/mm/vmscan.c index 4e6bb656afb3..9e12f5d75c06 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1414,7 +1414,7 @@ static unsigned long isolate_lru_pages(unsigned long nr_to_scan, if (!list_empty(&pages_skipped)) list_splice(&pages_skipped, src); *nr_scanned = scan; - trace_mm_vmscan_lru_isolate(sc->order, nr_to_scan, scan, + trace_mm_vmscan_lru_isolate(sc->reclaim_idx, sc->order, nr_to_scan, scan, nr_taken, mode, is_file_lru(lru)); return nr_taken; } @@ -3368,7 +3368,7 @@ static int kswapd(void *p) * Try reclaim the requested order but if that fails * then try sleeping on the basis of the order reclaimed. */ - trace_mm_vmscan_kswapd_wake(pgdat->node_id, order); + trace_mm_vmscan_kswapd_wake(pgdat->node_id, classzone_idx, order); if (balance_pgdat(pgdat, order, classzone_idx) < order) goto kswapd_try_sleep; -- 2.6.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx"> email@xxxxxxxxx </a>