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mm: compaction: cleanup the compaction trace events 

As Steven suggested [1], we should access the pointers from the trace
event to avoid dereferencing them to the tracepoint function when the
tracepoint is disabled.

[1] https://lkml.org/lkml/2021/11/3/409

Link: https://lkml.kernel.org/r/4cd393b4d57f8f01ed72c001509b28e3a3b1a8c1.1646985115.git.baolin.wang@linux.alibaba.com
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Steven Rostedt (Google) <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Baolin Wang 2022-03-22 14:45:56 -07:00 committed by Linus Torvalds
parent 96bd3e79ef
commit abd4349ff9
2 changed files with 16 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
include/trace/events/compaction.h
View File

@ -67,10 +67,10 @@ DEFINE_EVENT(mm_compaction_isolate_template, mm_compaction_isolate_freepages,
#ifdef CONFIG_COMPACTION
TRACE_EVENT(mm_compaction_migratepages,
TP_PROTO(unsigned long nr_all,
TP_PROTO(struct compact_control *cc,
unsigned int nr_succeeded),
TP_ARGS(nr_all, nr_succeeded),
TP_ARGS(cc, nr_succeeded),
TP_STRUCT__entry(
__field(unsigned long, nr_migrated)
@ -79,7 +79,7 @@ TRACE_EVENT(mm_compaction_migratepages,
TP_fast_assign(
__entry->nr_migrated = nr_succeeded;
__entry->nr_failed = nr_all - nr_succeeded;
__entry->nr_failed = cc->nr_migratepages - nr_succeeded;
),
TP_printk("nr_migrated=%lu nr_failed=%lu",
@ -88,10 +88,10 @@ TRACE_EVENT(mm_compaction_migratepages,
);
TRACE_EVENT(mm_compaction_begin,
TP_PROTO(unsigned long zone_start, unsigned long migrate_pfn,
unsigned long free_pfn, unsigned long zone_end, bool sync),
TP_PROTO(struct compact_control *cc, unsigned long zone_start,
unsigned long zone_end, bool sync),
TP_ARGS(zone_start, migrate_pfn, free_pfn, zone_end, sync),
TP_ARGS(cc, zone_start, zone_end, sync),
TP_STRUCT__entry(
__field(unsigned long, zone_start)
@ -103,8 +103,8 @@ TRACE_EVENT(mm_compaction_begin,
TP_fast_assign(
__entry->zone_start = zone_start;
__entry->migrate_pfn = migrate_pfn;
__entry->free_pfn = free_pfn;
__entry->migrate_pfn = cc->migrate_pfn;
__entry->free_pfn = cc->free_pfn;
__entry->zone_end = zone_end;
__entry->sync = sync;
),
@ -118,11 +118,11 @@ TRACE_EVENT(mm_compaction_begin,
);
TRACE_EVENT(mm_compaction_end,
TP_PROTO(unsigned long zone_start, unsigned long migrate_pfn,
unsigned long free_pfn, unsigned long zone_end, bool sync,
TP_PROTO(struct compact_control *cc, unsigned long zone_start,
unsigned long zone_end, bool sync,
int status),
TP_ARGS(zone_start, migrate_pfn, free_pfn, zone_end, sync, status),
TP_ARGS(cc, zone_start, zone_end, sync, status),
TP_STRUCT__entry(
__field(unsigned long, zone_start)
@ -135,8 +135,8 @@ TRACE_EVENT(mm_compaction_end,
TP_fast_assign(
__entry->zone_start = zone_start;
__entry->migrate_pfn = migrate_pfn;
__entry->free_pfn = free_pfn;
__entry->migrate_pfn = cc->migrate_pfn;
__entry->free_pfn = cc->free_pfn;
__entry->zone_end = zone_end;
__entry->sync = sync;
__entry->status = status;

9
mm/compaction.c
View File

@ -2387,8 +2387,7 @@ compact_zone(struct compact_control *cc, struct capture_control *capc)
update_cached = !sync &&
cc->zone->compact_cached_migrate_pfn[0] == cc->zone->compact_cached_migrate_pfn[1];
trace_mm_compaction_begin(start_pfn, cc->migrate_pfn,
cc->free_pfn, end_pfn, sync);
trace_mm_compaction_begin(cc, start_pfn, end_pfn, sync);
/* lru_add_drain_all could be expensive with involving other CPUs */
lru_add_drain();
@ -2438,8 +2437,7 @@ compact_zone(struct compact_control *cc, struct capture_control *capc)
compaction_free, (unsigned long)cc, cc->mode,
MR_COMPACTION, &nr_succeeded);
trace_mm_compaction_migratepages(cc->nr_migratepages,
nr_succeeded);
trace_mm_compaction_migratepages(cc, nr_succeeded);
/* All pages were either migrated or will be released */
cc->nr_migratepages = 0;
@ -2515,8 +2513,7 @@ compact_zone(struct compact_control *cc, struct capture_control *capc)
count_compact_events(COMPACTMIGRATE_SCANNED, cc->total_migrate_scanned);
count_compact_events(COMPACTFREE_SCANNED, cc->total_free_scanned);
trace_mm_compaction_end(start_pfn, cc->migrate_pfn,
cc->free_pfn, end_pfn, sync, ret);
trace_mm_compaction_end(cc, start_pfn, end_pfn, sync, ret);
return ret;
}