From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mta1.migadu.com (out-145.mta1.migadu.com [95.215.58.145]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 58E113F328C for ; Mon, 19 Oct 2026 04:23:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.145 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792383820; cv=none; b=qPZXii9dyaiRNJYTO5nRYazqQPZUBDBluiEOp68eW9OCIfsJnzQX3TdnOze0wKVcGfxkFImkYq2soq4C9cqyllMCtkz3Kp+DSYCJp2TH6FIhwGTxH9oZyVAxlG5gGxR7Ww0vJZlqV9TbXN+1NY+fwZxxQQ1X2BnPSEctvCCuoUQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792383820; c=relaxed/simple; bh=7Fh4oWhpxYf6gDp8+ypvgmOJyH6o3AMY/5a5fCOp5W8=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=WxSX2bS1S743eutmASQOKCZt1b9LGkV3qrkMtZXgVrv2hqCJMfkeObzI0czrFSArwPiNuDZizbWxsL0rfiAmE47KolTBFRBjBTbBxfIh9nVynLsA0VB+7YkpvX22QOUB74TDx6Z2xzw0FubqY4sdxJlkQ1k+U251uIUPOBZRqME= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=EoopDytz; arc=none smtp.client-ip=95.215.58.145 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="EoopDytz" X-Envelope-To: bpf@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=7Fh4oWhpxYf6gDp8+ypvgmOJyH6o3AMY/5a5fCOp5W8=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1792383816; v=1; x=1792988616; b=EoopDytzBZyCkdjuIvTJsIBxSLsCMtXEHUw3ua8S6L/ejm6mHsDqcwoP+aHjxlWoGl5Z/ycR sLM85E4sendGztrmFulCySA+sdjUD/w9aGEjkujTqkQn6RqoCeoQaMD05b1HjG0mAVYgO/4WYEz eaWAfTjOW6y06g2J2H18MIXQ= X-Envelope-To: bpf@vger.kernel.org Received: by smtp.migadu.com with ESMTPS id a50a931287826443; Mon, 19 Oct 2026 04:23:35 +0000 X-Mizu-Trace-ID: a50a931287826443 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 , David Hildenbrand , Lorenzo Stoakes , Kairui Song , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Baoquan He , Baolin Wang , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, bpf@vger.kernel.org, Ridong Chen , Ridong Chen Subject: [PATCH v4 6/9] mm/vmscan: pass scan_control to mm_vmscan_reclaim_pages Date: Mon, 19 Oct 2026 12:23:05 +0800 Message-Id: <20261019042308.2372396-1-ridong.chen@linux.dev> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20261019034426.2354049-1-ridong.chen@linux.dev> References: <20261019034426.2354049-1-ridong.chen@linux.dev> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Ridong Chen reclaim_folio_list() passes sc.nr_scanned to mm_vmscan_reclaim_pages as a bare argument. Pass the enclosing struct scan_control instead and read nr_scanned out in TP_fast_assign, consistent with the other reclaim tracepoints. nr_reclaimed stays a separate argument: it is the return value of shrink_folio_list(), which does not update sc->nr_reclaimed. 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). Assisted-by: LLM Signed-off-by: Ridong Chen --- mm/trace_vmscan.h | 10 +++++----- mm/vmscan.c | 2 +- 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/mm/trace_vmscan.h b/mm/trace_vmscan.h index b1b329039e14..54168ad45f6e 100644 --- a/mm/trace_vmscan.h +++ b/mm/trace_vmscan.h @@ -418,11 +418,11 @@ 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) @@ -440,7 +440,7 @@ 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; diff --git a/mm/vmscan.c b/mm/vmscan.c index 5d5eee757c61..4bb00371a67f 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -2178,7 +2178,7 @@ 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; } -- 2.34.1