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Sat, 31 Oct 2026 09:01:41 +0000 X-Mizu-Trace-ID: 15492aafd9b08072 X-Migadu-Flow: FLOW_OUT From: Ridong Chen To: Steven Rostedt , Masami Hiramatsu , Andrew Morton , Johannes Weiner , Michal Hocko , Roman Gushchin , Shakeel Butt , Dave Chinner Cc: Mathieu Desnoyers , Muchun Song , Qi Zheng , Kairui Song , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Baoquan He , Baolin Wang , David Hildenbrand , Lorenzo Stoakes , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org (open list:CONTROL GROUP - MEMORY RESOURCE CONTROLLER (MEMCG)), bpf@vger.kernel.org (open list:BPF [MISC]:Keyword:(?:\b|_)bpf(?:\b|_)), Ridong Chen , Ridong Chen Subject: [PATCH v5 4/6] mm/vmscan: pass scan_control to the vmscan tracepoints Date: Sat, 31 Oct 2026 17:00:39 +0800 Message-ID: <20261031090041.58574-5-ridong.chen@linux.dev> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20261031090041.58574-1-ridong.chen@linux.dev> References: <20261031090041.58574-1-ridong.chen@linux.dev> X-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: zkg8oqwu77rwottu5dq4iccia8pz6uu4 X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_PASS, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: B881340004 X-Rspam-User: X-HE-Tag: 1793437302-935254 X-HE-Meta: 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 dI7/3BSi ObjKbB9r78Y2Z+mlaA4xEHrxKWlTrb4ynfh48nIgq3i1sJXbxm9r50122Qph4D2ysuYutB2fsCAFf/X5bPUBHDIPLlVBvT1wtueR4YWzgV29p3lpujfaGu1qkGmq1fPDYcxYv0huU1zjJmlnNCsQPAxq1VnYiKjh5I0RH9pgaOlPeXc414zycaQq80R3FaFuayW7XbaGubOSsZMv4g19ycTWrjkIcx78AosXxH1YSqxkHHwqLf7J+kKf66sYg1MLF5KagUb1Kc34ukLbJvefLsb7wHTQ4uEnhSXBZPIVJ8bOg8fk= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 From: Ridong Chen Several vmscan tracepoints spell out reclaim state as individual arguments, all of which the caller already holds in struct scan_control. Now that the struct is visible from the trace header, pass sc directly and pick the fields out in TP_fast_assign instead of spelling them out at every callsite: - mm_vmscan_direct_reclaim_begin, mm_vmscan_memcg_reclaim_begin and mm_vmscan_node_reclaim_begin: gfp_mask and order. - mm_vmscan_lru_isolate, mm_vmscan_lru_shrink_inactive and mm_vmscan_lru_shrink_active: reclaim_idx, order and priority. - mm_vmscan_reclaim_pages: nr_scanned. nr_reclaimed stays a separate argument: it is the return value of shrink_folio_list(), which does not update sc->nr_reclaimed. - mm_vmscan_balance_pgdat_end: order and nr_reclaimed. highest_zoneidx stays a separate argument: it is a balance_pgdat() parameter, and sc.reclaim_idx may differ from it by the time the end event fires. No functional change. The tracefs event format (TP_STRUCT__entry and TP_printk) is unchanged, so tracefs-based consumers are unaffected. BPF programs attached via raw_tp/tp_btf see the new TP_PROTO and need to be adjusted; tracepoints are not a stable ABI (see Documentation/bpf/bpf_design_QA.rst). Signed-off-by: Ridong Chen --- mm/trace_vmscan.h | 74 +++++++++++++++++++++++------------------------ mm/vmscan.c | 26 ++++++++--------- 2 files changed, 48 insertions(+), 52 deletions(-) diff --git a/mm/trace_vmscan.h b/mm/trace_vmscan.h index 3917e1b62dfa..b2ad83e5f25e 100644 --- a/mm/trace_vmscan.h +++ b/mm/trace_vmscan.h @@ -124,10 +124,9 @@ TRACE_EVENT(mm_vmscan_balance_pgdat_begin, TRACE_EVENT(mm_vmscan_balance_pgdat_end, - TP_PROTO(int nid, int order, int highest_zoneidx, - unsigned long nr_reclaimed), + TP_PROTO(int nid, struct scan_control *sc, int highest_zoneidx), - TP_ARGS(nid, order, highest_zoneidx, nr_reclaimed), + TP_ARGS(nid, sc, highest_zoneidx), TP_STRUCT__entry( __field(int, nid) @@ -138,9 +137,9 @@ TRACE_EVENT(mm_vmscan_balance_pgdat_end, TP_fast_assign( __entry->nid = nid; - __entry->order = order; + __entry->order = sc->order; __entry->highest_zoneidx = highest_zoneidx; - __entry->nr_reclaimed = nr_reclaimed; + __entry->nr_reclaimed = sc->nr_reclaimed; ), TP_printk("nid=%d order=%d highest_zoneidx=%-8s nr_reclaimed=%lu", @@ -178,9 +177,9 @@ TRACE_EVENT(mm_vmscan_wakeup_kswapd, DECLARE_EVENT_CLASS(mm_vmscan_direct_reclaim_begin_template, - TP_PROTO(gfp_t gfp_flags, int order, struct mem_cgroup *memcg), + TP_PROTO(struct scan_control *sc, struct mem_cgroup *memcg), - TP_ARGS(gfp_flags, order, memcg), + TP_ARGS(sc, memcg), TP_STRUCT__entry( __field( unsigned long, gfp_flags ) @@ -189,8 +188,8 @@ DECLARE_EVENT_CLASS(mm_vmscan_direct_reclaim_begin_template, ), TP_fast_assign( - __entry->gfp_flags = (__force unsigned long)gfp_flags; - __entry->order = order; + __entry->gfp_flags = (__force unsigned long)sc->gfp_mask; + __entry->order = sc->order; __entry->memcg_id = mem_cgroup_id(memcg); ), @@ -204,17 +203,17 @@ DECLARE_EVENT_CLASS(mm_vmscan_direct_reclaim_begin_template, DEFINE_EVENT(mm_vmscan_direct_reclaim_begin_template, mm_vmscan_direct_reclaim_begin, - TP_PROTO(gfp_t gfp_flags, int order, struct mem_cgroup *memcg), + TP_PROTO(struct scan_control *sc, struct mem_cgroup *memcg), - TP_ARGS(gfp_flags, order, memcg) + TP_ARGS(sc, memcg) ); #ifdef CONFIG_MEMCG DEFINE_EVENT(mm_vmscan_direct_reclaim_begin_template, mm_vmscan_memcg_reclaim_begin, - TP_PROTO(gfp_t gfp_flags, int order, struct mem_cgroup *memcg), + TP_PROTO(struct scan_control *sc, struct mem_cgroup *memcg), - TP_ARGS(gfp_flags, order, memcg) + TP_ARGS(sc, memcg) ); #endif /* CONFIG_MEMCG */ @@ -350,15 +349,14 @@ TRACE_EVENT(mm_shrink_slab_end, ); TRACE_EVENT(mm_vmscan_lru_isolate, - TP_PROTO(int highest_zoneidx, - int order, - unsigned long nr_requested, - unsigned long nr_scanned, - unsigned long nr_skipped, - unsigned long nr_taken, - int lru), + TP_PROTO(struct scan_control *sc, + unsigned long nr_requested, + unsigned long nr_scanned, + unsigned long nr_skipped, + unsigned long nr_taken, + int lru), - TP_ARGS(highest_zoneidx, order, nr_requested, nr_scanned, nr_skipped, nr_taken, lru), + TP_ARGS(sc, nr_requested, nr_scanned, nr_skipped, nr_taken, lru), TP_STRUCT__entry( __field(int, highest_zoneidx) @@ -371,8 +369,8 @@ TRACE_EVENT(mm_vmscan_lru_isolate, ), TP_fast_assign( - __entry->highest_zoneidx = highest_zoneidx; - __entry->order = order; + __entry->highest_zoneidx = sc->reclaim_idx; + __entry->order = sc->order; __entry->nr_requested = nr_requested; __entry->nr_scanned = nr_scanned; __entry->nr_skipped = nr_skipped; @@ -419,11 +417,11 @@ TRACE_EVENT(mm_vmscan_write_folio, TRACE_EVENT(mm_vmscan_reclaim_pages, - TP_PROTO(int nid, - unsigned long nr_scanned, unsigned long nr_reclaimed, - struct reclaim_stat *stat), + TP_PROTO(int nid, struct scan_control *sc, + unsigned long nr_reclaimed, + struct reclaim_stat *stat), - TP_ARGS(nid, nr_scanned, nr_reclaimed, stat), + TP_ARGS(nid, sc, nr_reclaimed, stat), TP_STRUCT__entry( __field(int, nid) @@ -441,7 +439,7 @@ TRACE_EVENT(mm_vmscan_reclaim_pages, TP_fast_assign( __entry->nid = nid; - __entry->nr_scanned = nr_scanned; + __entry->nr_scanned = sc->nr_scanned; __entry->nr_reclaimed = nr_reclaimed; __entry->nr_dirty = stat->nr_dirty; __entry->nr_writeback = stat->nr_writeback; @@ -466,9 +464,9 @@ TRACE_EVENT(mm_vmscan_lru_shrink_inactive, TP_PROTO(int nid, unsigned long nr_scanned, unsigned long nr_reclaimed, - struct reclaim_stat *stat, int priority, int file), + struct reclaim_stat *stat, struct scan_control *sc, int file), - TP_ARGS(nid, nr_scanned, nr_reclaimed, stat, priority, file), + TP_ARGS(nid, nr_scanned, nr_reclaimed, stat, sc, file), TP_STRUCT__entry( __field(int, nid) @@ -498,7 +496,7 @@ TRACE_EVENT(mm_vmscan_lru_shrink_inactive, __entry->nr_activate1 = stat->nr_activate[1]; __entry->nr_ref_keep = stat->nr_ref_keep; __entry->nr_unmap_fail = stat->nr_unmap_fail; - __entry->priority = priority; + __entry->priority = sc->priority; __entry->reclaim_flags = trace_reclaim_flags(file); ), @@ -517,9 +515,9 @@ TRACE_EVENT(mm_vmscan_lru_shrink_active, TP_PROTO(int nid, unsigned long nr_taken, unsigned long nr_active, unsigned long nr_deactivated, - unsigned long nr_referenced, int priority, int file), + unsigned long nr_referenced, struct scan_control *sc, int file), - TP_ARGS(nid, nr_taken, nr_active, nr_deactivated, nr_referenced, priority, file), + TP_ARGS(nid, nr_taken, nr_active, nr_deactivated, nr_referenced, sc, file), TP_STRUCT__entry( __field(int, nid) @@ -537,7 +535,7 @@ TRACE_EVENT(mm_vmscan_lru_shrink_active, __entry->nr_active = nr_active; __entry->nr_deactivated = nr_deactivated; __entry->nr_referenced = nr_referenced; - __entry->priority = priority; + __entry->priority = sc->priority; __entry->reclaim_flags = trace_reclaim_flags(file); ), @@ -551,9 +549,9 @@ TRACE_EVENT(mm_vmscan_lru_shrink_active, TRACE_EVENT(mm_vmscan_node_reclaim_begin, - TP_PROTO(int nid, int order, gfp_t gfp_flags), + TP_PROTO(int nid, struct scan_control *sc), - TP_ARGS(nid, order, gfp_flags), + TP_ARGS(nid, sc), TP_STRUCT__entry( __field(int, nid) @@ -563,8 +561,8 @@ TRACE_EVENT(mm_vmscan_node_reclaim_begin, TP_fast_assign( __entry->nid = nid; - __entry->order = order; - __entry->gfp_flags = (__force unsigned long)gfp_flags; + __entry->order = sc->order; + __entry->gfp_flags = (__force unsigned long)sc->gfp_mask; ), TP_printk("nid=%d order=%d gfp_flags=%s", diff --git a/mm/vmscan.c b/mm/vmscan.c index 49677464fc9a..15e9184a580a 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1764,7 +1764,7 @@ static unsigned long isolate_lru_folios(unsigned long nr_to_scan, } } *nr_scanned = total_scan; - trace_mm_vmscan_lru_isolate(sc->reclaim_idx, sc->order, nr_to_scan, + trace_mm_vmscan_lru_isolate(sc, nr_to_scan, total_scan, skipped, nr_taken, lru); update_lru_sizes(lruvec, lru, nr_zone_taken); return nr_taken; @@ -2053,7 +2053,7 @@ static unsigned long shrink_inactive_list(unsigned long nr_to_scan, handle_reclaim_writeback(nr_taken, pgdat, sc, &stat); trace_mm_vmscan_lru_shrink_inactive(pgdat->node_id, - nr_scanned, nr_reclaimed, &stat, sc->priority, file); + nr_scanned, nr_reclaimed, &stat, sc, file); return nr_reclaimed; } @@ -2160,7 +2160,7 @@ static void shrink_active_list(unsigned long nr_to_scan, mod_lruvec_state(lruvec, PGROTATE_ANON + file, nr_rotated); trace_mm_vmscan_lru_shrink_active(pgdat->node_id, nr_taken, nr_activate, - nr_deactivate, nr_rotated, sc->priority, file); + nr_deactivate, nr_rotated, sc, file); } static unsigned int reclaim_folio_list(struct list_head *folio_list, @@ -2183,7 +2183,7 @@ static unsigned int reclaim_folio_list(struct list_head *folio_list, list_del(&folio->lru); folio_putback_lru(folio); } - trace_mm_vmscan_reclaim_pages(pgdat->node_id, sc.nr_scanned, nr_reclaimed, &stat); + trace_mm_vmscan_reclaim_pages(pgdat->node_id, &sc, nr_reclaimed, &stat); return nr_reclaimed; } @@ -4849,9 +4849,9 @@ static int scan_folios(unsigned long nr_to_scan, struct lruvec *lruvec, mod_lruvec_state(lruvec, item, isolated); mod_lruvec_state(lruvec, PGREFILL, sorted); mod_lruvec_state(lruvec, PGSCAN_ANON + type, isolated); - trace_mm_vmscan_lru_isolate(sc->reclaim_idx, sc->order, nr_to_scan, - scanned, skipped, isolated, - type ? LRU_INACTIVE_FILE : LRU_INACTIVE_ANON); + trace_mm_vmscan_lru_isolate(sc, nr_to_scan, + scanned, skipped, isolated, + type ? LRU_INACTIVE_FILE : LRU_INACTIVE_ANON); *isolatedp = isolated; return scanned; @@ -4993,7 +4993,7 @@ static int evict_folios(unsigned long nr_to_scan, struct lruvec *lruvec, if (isolated) handle_reclaim_writeback(isolated, pgdat, sc, &stat); trace_mm_vmscan_lru_shrink_inactive(pgdat->node_id, - type_scanned, reclaimed, &stat, sc->priority, + type_scanned, reclaimed, &stat, sc, type ? LRU_INACTIVE_FILE : LRU_INACTIVE_ANON); list_for_each_entry_safe_reverse(folio, next, &list, lru) { @@ -6889,7 +6889,7 @@ unsigned long try_to_free_pages(struct zonelist *zonelist, int order, return 1; set_task_reclaim_state(current, &sc.reclaim_state); - trace_mm_vmscan_direct_reclaim_begin(sc.gfp_mask, order, NULL); + trace_mm_vmscan_direct_reclaim_begin(&sc, NULL); nr_reclaimed = do_try_to_free_pages(zonelist, &sc); @@ -6930,7 +6930,7 @@ unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *memcg, struct zonelist *zonelist = node_zonelist(numa_node_id(), sc.gfp_mask); set_task_reclaim_state(current, &sc.reclaim_state); - trace_mm_vmscan_memcg_reclaim_begin(sc.gfp_mask, 0, memcg); + trace_mm_vmscan_memcg_reclaim_begin(&sc, memcg); noreclaim_flag = memalloc_noreclaim_save(); nr_reclaimed = do_try_to_free_pages(zonelist, &sc); @@ -7407,8 +7407,7 @@ static int balance_pgdat(pg_data_t *pgdat, int order, int highest_zoneidx) psi_memstall_leave(&pflags); set_task_reclaim_state(current, NULL); - trace_mm_vmscan_balance_pgdat_end(pgdat->node_id, sc.order, - highest_zoneidx, sc.nr_reclaimed); + trace_mm_vmscan_balance_pgdat_end(pgdat->node_id, &sc, highest_zoneidx); /* * Return the order kswapd stopped reclaiming at as @@ -7886,8 +7885,7 @@ static unsigned long __node_reclaim(struct pglist_data *pgdat, unsigned int noreclaim_flag; unsigned long pflags; - trace_mm_vmscan_node_reclaim_begin(pgdat->node_id, sc->order, - sc->gfp_mask); + trace_mm_vmscan_node_reclaim_begin(pgdat->node_id, sc); cond_resched(); if (!sc->proactive) -- 2.43.0