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mm/vmscan: drop may_writepage and classzone_idx from direct reclaim begin template

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There are three tracepoints using this template, which are
mm_vmscan_direct_reclaim_begin,
mm_vmscan_memcg_reclaim_begin,
mm_vmscan_memcg_softlimit_reclaim_begin.

Regarding mm_vmscan_direct_reclaim_begin,
sc.may_writepage is !laptop_mode, that's a static setting, and
reclaim_idx is derived from gfp_mask which is already show in this
tracepoint.

Regarding mm_vmscan_memcg_reclaim_begin,
may_writepage is !laptop_mode too, and reclaim_idx is (MAX_NR_ZONES-1),
which are both static value.

mm_vmscan_memcg_softlimit_reclaim_begin is the same with
mm_vmscan_memcg_reclaim_begin.

So we can drop them all.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Yafang Shao <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Yafang Shao 2019-05-13 17:19:14 -07:00 • committed by Linus Torvalds
commit 3481c37ffa
2 changed files with 13 additions and 27 deletions
Download patch file Download diff file Expand all files Collapse all files

26
include/trace/events/vmscan.h
View file

@ -106,51 +106,45 @@ TRACE_EVENT(mm_vmscan_wakeup_kswapd,
DECLARE_EVENT_CLASS(mm_vmscan_direct_reclaim_begin_template,
TP_PROTO(int order, int may_writepage, gfp_t gfp_flags, int classzone_idx),
TP_PROTO(int order, gfp_t gfp_flags),
TP_ARGS(order, may_writepage, gfp_flags, classzone_idx),
TP_ARGS(order, gfp_flags),
TP_STRUCT__entry(
__field( int, order )
__field( int, may_writepage )
__field( gfp_t, gfp_flags )
__field( int, classzone_idx )
),
TP_fast_assign(
__entry->order = order;
__entry->may_writepage = may_writepage;
__entry->gfp_flags = gfp_flags;
__entry->classzone_idx = classzone_idx;
),
TP_printk("order=%d may_writepage=%d gfp_flags=%s classzone_idx=%d",
TP_printk("order=%d gfp_flags=%s",
__entry->order,
__entry->may_writepage,
show_gfp_flags(__entry->gfp_flags),
__entry->classzone_idx)
show_gfp_flags(__entry->gfp_flags))
);
DEFINE_EVENT(mm_vmscan_direct_reclaim_begin_template, mm_vmscan_direct_reclaim_begin,
TP_PROTO(int order, int may_writepage, gfp_t gfp_flags, int classzone_idx),
TP_PROTO(int order, gfp_t gfp_flags),
TP_ARGS(order, may_writepage, gfp_flags, classzone_idx)
TP_ARGS(order, gfp_flags)
);
#ifdef CONFIG_MEMCG
DEFINE_EVENT(mm_vmscan_direct_reclaim_begin_template, mm_vmscan_memcg_reclaim_begin,
TP_PROTO(int order, int may_writepage, gfp_t gfp_flags, int classzone_idx),
TP_PROTO(int order, gfp_t gfp_flags),
TP_ARGS(order, may_writepage, gfp_flags, classzone_idx)
TP_ARGS(order, gfp_flags)
);
DEFINE_EVENT(mm_vmscan_direct_reclaim_begin_template, mm_vmscan_memcg_softlimit_reclaim_begin,
TP_PROTO(int order, int may_writepage, gfp_t gfp_flags, int classzone_idx),
TP_PROTO(int order, gfp_t gfp_flags),
TP_ARGS(order, may_writepage, gfp_flags, classzone_idx)
TP_ARGS(order, gfp_flags)
);
#endif /* CONFIG_MEMCG */