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mm: vmscan: add PIDs to vmscan tracepoints

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The changes aims at adding additionnal tracepoints variables to help
debuggers attribute them to specific processes.

Link: https://lkml.kernel.org/r/20260316160908.42727-4-tballasi@linux.microsoft.com
Signed-off-by: Thomas Ballasi <tballasi@linux.microsoft.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Qi Zheng <zhengqi.arch@bytedance.com>
Cc: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Steven Rostedt (Google) <rostedt@goodmis.org>
Cc: Wei Xu <weixugc@google.com>
Cc: Yuanchu Xie <yuanchu@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Thomas Ballasi 2026-03-16 09:09:08 -07:00 committed by Andrew Morton
parent 874a0a566e
commit 77a9c445b6
1 changed files with 16 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
include/trace/events/vmscan.h
View File

@ -140,10 +140,12 @@ DECLARE_EVENT_CLASS(mm_vmscan_direct_reclaim_begin_template,
__entry->memcg_id = mem_cgroup_id(memcg);
),
TP_printk("order=%d gfp_flags=%s memcg_id=%llu",
TP_printk("order=%d gfp_flags=%s pid=%d memcg_id=%llu %s",
__entry->order,
show_gfp_flags(__entry->gfp_flags),
__entry->memcg_id)
__entry->ent.pid,
__entry->memcg_id,
__event_in_irq() ? "(in-irq)" : "")
);
DEFINE_EVENT(mm_vmscan_direct_reclaim_begin_template, mm_vmscan_direct_reclaim_begin,
@ -185,9 +187,11 @@ DECLARE_EVENT_CLASS(mm_vmscan_direct_reclaim_end_template,
__entry->memcg_id = mem_cgroup_id(memcg);
),
TP_printk("nr_reclaimed=%lu memcg_id=%llu",
TP_printk("nr_reclaimed=%lu pid=%d memcg_id=%llu %s",
__entry->nr_reclaimed,
__entry->memcg_id)
__entry->ent.pid,
__entry->memcg_id,
__event_in_irq() ? "(in-irq)" : "")
);
DEFINE_EVENT(mm_vmscan_direct_reclaim_end_template, mm_vmscan_direct_reclaim_end,
@ -248,17 +252,19 @@ TRACE_EVENT(mm_shrink_slab_start,
__entry->memcg_id = mem_cgroup_id(memcg);
),
TP_printk("%pS %p: nid: %d memcg_id: %llu objects to shrink %ld gfp_flags %s cache items %ld delta %lld total_scan %ld priority %d",
TP_printk("%pS %p: nid: %d pid: %d memcg_id: %llu objects to shrink %ld gfp_flags %s cache items %ld delta %lld total_scan %ld priority %d %s",
__entry->shrink,
__entry->shr,
__entry->nid,
__entry->ent.pid,
__entry->memcg_id,
__entry->nr_objects_to_shrink,
show_gfp_flags(__entry->gfp_flags),
__entry->cache_items,
__entry->delta,
__entry->total_scan,
__entry->priority)
__entry->priority,
__event_in_irq() ? "(in-irq)" : "")
);
TRACE_EVENT(mm_shrink_slab_end,
@ -290,15 +296,17 @@ TRACE_EVENT(mm_shrink_slab_end,
__entry->memcg_id = mem_cgroup_id(memcg);
),
TP_printk("%pS %p: nid: %d memcg_id: %llu unused scan count %ld new scan count %ld total_scan %ld last shrinker return val %d",
TP_printk("%pS %p: nid: %d pid: %d memcg_id: %llu unused scan count %ld new scan count %ld total_scan %ld last shrinker return val %d %s",
__entry->shrink,
__entry->shr,
__entry->nid,
__entry->ent.pid,
__entry->memcg_id,
__entry->unused_scan,
__entry->new_scan,
__entry->total_scan,
__entry->retval)
__entry->retval,
__event_in_irq() ? "(in-irq)" : "")
);
TRACE_EVENT(mm_vmscan_lru_isolate,