mm/vmscan: drop may_writepage and classzone_idx from direct reclaim begin template
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/1553736322-32235-1-git-send-email-laoar.shao@gmail.com
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/trace/events/vmscan.h b/include/trace/events/vmscan.h
index b8b9d42..0aa882a 100644
--- a/include/trace/events/vmscan.h
+++ b/include/trace/events/vmscan.h
@@ -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 */
diff --git a/mm/vmscan.c b/mm/vmscan.c
index e869f9e..41a14eed 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -3174,10 +3174,7 @@ unsigned long try_to_free_pages(struct zonelist *zonelist, int order,
if (throttle_direct_reclaim(sc.gfp_mask, zonelist, nodemask))
return 1;
- trace_mm_vmscan_direct_reclaim_begin(order,
- sc.may_writepage,
- sc.gfp_mask,
- sc.reclaim_idx);
+ trace_mm_vmscan_direct_reclaim_begin(order, sc.gfp_mask);
nr_reclaimed = do_try_to_free_pages(zonelist, &sc);
@@ -3208,9 +3205,7 @@ unsigned long mem_cgroup_shrink_node(struct mem_cgroup *memcg,
(GFP_HIGHUSER_MOVABLE & ~GFP_RECLAIM_MASK);
trace_mm_vmscan_memcg_softlimit_reclaim_begin(sc.order,
- sc.may_writepage,
- sc.gfp_mask,
- sc.reclaim_idx);
+ sc.gfp_mask);
/*
* NOTE: Although we can get the priority field, using it
@@ -3259,10 +3254,7 @@ unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *memcg,
zonelist = &NODE_DATA(nid)->node_zonelists[ZONELIST_FALLBACK];
- trace_mm_vmscan_memcg_reclaim_begin(0,
- sc.may_writepage,
- sc.gfp_mask,
- sc.reclaim_idx);
+ trace_mm_vmscan_memcg_reclaim_begin(0, sc.gfp_mask);
psi_memstall_enter(&pflags);
noreclaim_flag = memalloc_noreclaim_save();
