Recently, Mel Gorman added some vmscan tracepoint. but they can't
trace memcg. So, This patch series does.
following three patches are nit fix and cleanups.
memcg: sc.nr_to_reclaim should be initialized
memcg: mem_cgroup_shrink_node_zone() doesn't need sc.nodemask
memcg: nid and zid can be calculated from zone
following four patches are tracepoint conversion and adding memcg tracepoints.
vmscan: convert direct reclaim tracepoint to DEFINE_EVENT
memcg, vmscan: add memcg reclaim tracepoint
vmscan: convert mm_vmscan_lru_isolate to DEFINE_EVENT
memcg, vmscan: add mm_vmscan_memcg_isolate tracepoint
diffstat
================
include/linux/memcontrol.h | 6 ++--
include/linux/mmzone.h | 5 +++
include/linux/swap.h | 3 +-
include/trace/events/vmscan.h | 79 +++++++++++++++++++++++++++++++++++++++--
mm/memcontrol.c | 15 +++++---
mm/vmscan.c | 35 ++++++++++++------
6 files changed, 118 insertions(+), 25 deletions(-)
Sameple output is here.
=========================
dd-1851 [001] 158.837763: mm_vmscan_memcg_reclaim_begin: order=0 may_writepage=1 gfp_flags=GFP_HIGHUSER_MOVABLE
dd-1851 [001] 158.837783: mm_vmscan_memcg_isolate: isolate_mode=0 order=0 nr_requested=32 nr_scanned=32 nr_taken=32 contig_taken=0 contig_dirty=0 contig_failed=0
dd-1851 [001] 158.837860: mm_vmscan_memcg_reclaim_end: nr_reclaimed=32
(...)
dd-1970 [000] 266.608235: mm_vmscan_wakeup_kswapd: nid=0 zid=1 order=0
dd-1970 [000] 266.608239: mm_vmscan_wakeup_kswapd: nid=1 zid=1 order=0
dd-1970 [000] 266.608248: mm_vmscan_wakeup_kswapd: nid=2 zid=1 order=0
kswapd1-348 [001] 266.608254: mm_vmscan_kswapd_wake: nid=1 order=0
dd-1970 [000] 266.608254: mm_vmscan_wakeup_kswapd: nid=3 zid=1 order=0
kswapd3-350 [000] 266.608266: mm_vmscan_kswapd_wake: nid=3 order=0
(...)
kswapd0-347 [001] 267.328891: mm_vmscan_memcg_softlimit_reclaim_begin: order=0 may_writepage=1 gfp_flags=GFP_HIGHUSER_MOVABLE
kswapd0-347 [001] 267.328897: mm_vmscan_memcg_isolate: isolate_mode=0 order=0 nr_requested=32 nr_scanned=32 nr_taken=32 contig_taken=0 contig_dirty=0 contig_failed=0
kswapd0-347 [001] 267.328915: mm_vmscan_memcg_isolate: isolate_mode=0 order=0 nr_requested=32 nr_scanned=32 nr_taken=32 contig_taken=0 contig_dirty=0 contig_failed=0
kswapd0-347 [001] 267.328989: mm_vmscan_memcg_softlimit_reclaim_end: nr_reclaimed=32
kswapd0-347 [001] 267.329019: mm_vmscan_lru_isolate: isolate_mode=1 order=0 nr_requested=32 nr_scanned=32 nr_taken=32 contig_taken=0 contig_dirty=0 contig_failed=0
kswapd0-347 [001] 267.330562: mm_vmscan_lru_isolate: isolate_mode=1 order=0 nr_requested=32 nr_scanned=32 nr_taken=32 contig_taken=0 contig_dirty=0 contig_failed=0
(...)
kswapd2-349 [001] 267.407081: mm_vmscan_kswapd_sleep: nid=2
kswapd3-350 [001] 267.408077: mm_vmscan_kswapd_sleep: nid=3
kswapd1-348 [000] 267.427858: mm_vmscan_kswapd_sleep: nid=1
kswapd0-347 [001] 267.430064: mm_vmscan_kswapd_sleep: nid=0
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