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mm: vmscan: add PIDs to vmscan tracepoints

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>

authored by

Thomas Ballasi and committed by
Andrew Morton 77a9c445 874a0a56

+16 -8
+16 -8
include/trace/events/vmscan.h
··· 140 140 __entry->memcg_id = mem_cgroup_id(memcg); 141 141 ), 142 142 143 - TP_printk("order=%d gfp_flags=%s memcg_id=%llu", 143 + TP_printk("order=%d gfp_flags=%s pid=%d memcg_id=%llu %s", 144 144 __entry->order, 145 145 show_gfp_flags(__entry->gfp_flags), 146 - __entry->memcg_id) 146 + __entry->ent.pid, 147 + __entry->memcg_id, 148 + __event_in_irq() ? "(in-irq)" : "") 147 149 ); 148 150 149 151 DEFINE_EVENT(mm_vmscan_direct_reclaim_begin_template, mm_vmscan_direct_reclaim_begin, ··· 187 185 __entry->memcg_id = mem_cgroup_id(memcg); 188 186 ), 189 187 190 - TP_printk("nr_reclaimed=%lu memcg_id=%llu", 188 + TP_printk("nr_reclaimed=%lu pid=%d memcg_id=%llu %s", 191 189 __entry->nr_reclaimed, 192 - __entry->memcg_id) 190 + __entry->ent.pid, 191 + __entry->memcg_id, 192 + __event_in_irq() ? "(in-irq)" : "") 193 193 ); 194 194 195 195 DEFINE_EVENT(mm_vmscan_direct_reclaim_end_template, mm_vmscan_direct_reclaim_end, ··· 252 248 __entry->memcg_id = mem_cgroup_id(memcg); 253 249 ), 254 250 255 - 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", 251 + 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", 256 252 __entry->shrink, 257 253 __entry->shr, 258 254 __entry->nid, 255 + __entry->ent.pid, 259 256 __entry->memcg_id, 260 257 __entry->nr_objects_to_shrink, 261 258 show_gfp_flags(__entry->gfp_flags), 262 259 __entry->cache_items, 263 260 __entry->delta, 264 261 __entry->total_scan, 265 - __entry->priority) 262 + __entry->priority, 263 + __event_in_irq() ? "(in-irq)" : "") 266 264 ); 267 265 268 266 TRACE_EVENT(mm_shrink_slab_end, ··· 296 290 __entry->memcg_id = mem_cgroup_id(memcg); 297 291 ), 298 292 299 - 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", 293 + 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", 300 294 __entry->shrink, 301 295 __entry->shr, 302 296 __entry->nid, 297 + __entry->ent.pid, 303 298 __entry->memcg_id, 304 299 __entry->unused_scan, 305 300 __entry->new_scan, 306 301 __entry->total_scan, 307 - __entry->retval) 302 + __entry->retval, 303 + __event_in_irq() ? "(in-irq)" : "") 308 304 ); 309 305 310 306 TRACE_EVENT(mm_vmscan_lru_isolate,