From nobody Mon Feb 9 01:29:30 2026 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8F495157A6B for ; Tue, 11 Feb 2025 00:32:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739233960; cv=none; b=t2LuUW0TbtiDbd87yA7BiJbuuZuQ8CQYfGWEgNC3yoMtcHPyFDPpTmbjHMV7SCROJKhFy83RhcRhGIcmHMLf/al+KtvbCBBlEDI1+x5HnVf+Q/g7ry/bRl40OOcWiD0mQSyE2jRPT3xnkLPdDi+sYkfjrYS8tT1zUc9PR9z8u/Y= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739233960; c=relaxed/simple; bh=JPucIzP6hBd57vYfJsYxB4P4vQ+RDB6cBPSfUoc+880=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=W4YdygEERQw7IKVxOk31ZdksW6WjC/CCSUUH5RpHNoFfBkvavwKsRgNaN+lwL4BlhcJCDmv2oCyAh//goUVqKjlpKJ2cGBh5dTqvjK7IZTvv7c4k7inmsRp+w5TeEY4fc6uvlzOXFkxDgb0l/U2rKT9Bo1adLo87dlL2SLd9pVc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=a+yWVb5M; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="a+yWVb5M" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1739233957; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=mWdmFB3VEeA1XnEF1XTP4N/+VjRlOdLjAcJyCJVOZpY=; b=a+yWVb5Mal7Cql/f2710z1O5RCKd5FkOhzIGZQGgPhq1N4wMbAlEo6l+vO4uuaQIxQ6kZA j/GpwymkkpcUd4vOWq4kHsShgxJyOzRsHOpDOsRwr1PNrm829ahNEh2LV8kO/pmk46ovaM hnv3f9Zf6N6OsOm/mP6ZHYFDyhFDoOU= Received: from mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-20-dTR64f4SM6qnszwScxMw2w-1; Mon, 10 Feb 2025 19:32:35 -0500 X-MC-Unique: dTR64f4SM6qnszwScxMw2w-1 X-Mimecast-MFC-AGG-ID: dTR64f4SM6qnszwScxMw2w Received: from mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.111]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 84DE3195608C; Tue, 11 Feb 2025 00:32:24 +0000 (UTC) Received: from h1.redhat.com (unknown [10.22.88.129]) by mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id A30601800876; Tue, 11 Feb 2025 00:32:14 +0000 (UTC) From: Nico Pache To: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-mm@kvack.org Cc: ryan.roberts@arm.com, anshuman.khandual@arm.com, catalin.marinas@arm.com, cl@gentwo.org, vbabka@suse.cz, mhocko@suse.com, apopple@nvidia.com, dave.hansen@linux.intel.com, will@kernel.org, baohua@kernel.org, jack@suse.cz, srivatsa@csail.mit.edu, haowenchao22@gmail.com, hughd@google.com, aneesh.kumar@kernel.org, yang@os.amperecomputing.com, peterx@redhat.com, ioworker0@gmail.com, wangkefeng.wang@huawei.com, ziy@nvidia.com, jglisse@google.com, surenb@google.com, vishal.moola@gmail.com, zokeefe@google.com, zhengqi.arch@bytedance.com, jhubbard@nvidia.com, 21cnbao@gmail.com, willy@infradead.org, kirill.shutemov@linux.intel.com, david@redhat.com, aarcange@redhat.com, raquini@redhat.com, dev.jain@arm.com, sunnanyong@huawei.com, usamaarif642@gmail.com, audra@redhat.com, akpm@linux-foundation.org, rostedt@goodmis.org, mathieu.desnoyers@efficios.com, tiwai@suse.de Subject: [RFC v2 8/9] khugepaged: improve tracepoints for mTHP orders Date: Mon, 10 Feb 2025 17:30:27 -0700 Message-ID: <20250211003028.213461-9-npache@redhat.com> In-Reply-To: <20250211003028.213461-1-npache@redhat.com> References: <20250211003028.213461-1-npache@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 Content-Type: text/plain; charset="utf-8" Add the order to the tracepoints to give better insight into what order is being operated at for khugepaged. Signed-off-by: Nico Pache --- include/trace/events/huge_memory.h | 34 +++++++++++++++++++----------- mm/khugepaged.c | 10 +++++---- 2 files changed, 28 insertions(+), 16 deletions(-) diff --git a/include/trace/events/huge_memory.h b/include/trace/events/huge= _memory.h index 9d5c00b0285c..ea2fe20a39f5 100644 --- a/include/trace/events/huge_memory.h +++ b/include/trace/events/huge_memory.h @@ -92,34 +92,37 @@ TRACE_EVENT(mm_khugepaged_scan_pmd, =20 TRACE_EVENT(mm_collapse_huge_page, =20 - TP_PROTO(struct mm_struct *mm, int isolated, int status), + TP_PROTO(struct mm_struct *mm, int isolated, int status, int order), =20 - TP_ARGS(mm, isolated, status), + TP_ARGS(mm, isolated, status, order), =20 TP_STRUCT__entry( __field(struct mm_struct *, mm) __field(int, isolated) __field(int, status) + __field(int, order) ), =20 TP_fast_assign( __entry->mm =3D mm; __entry->isolated =3D isolated; __entry->status =3D status; + __entry->order =3D order; ), =20 - TP_printk("mm=3D%p, isolated=3D%d, status=3D%s", + TP_printk("mm=3D%p, isolated=3D%d, status=3D%s order=3D%d", __entry->mm, __entry->isolated, - __print_symbolic(__entry->status, SCAN_STATUS)) + __print_symbolic(__entry->status, SCAN_STATUS), + __entry->order) ); =20 TRACE_EVENT(mm_collapse_huge_page_isolate, =20 TP_PROTO(struct page *page, int none_or_zero, - int referenced, bool writable, int status), + int referenced, bool writable, int status, int order), =20 - TP_ARGS(page, none_or_zero, referenced, writable, status), + TP_ARGS(page, none_or_zero, referenced, writable, status, order), =20 TP_STRUCT__entry( __field(unsigned long, pfn) @@ -127,6 +130,7 @@ TRACE_EVENT(mm_collapse_huge_page_isolate, __field(int, referenced) __field(bool, writable) __field(int, status) + __field(int, order) ), =20 TP_fast_assign( @@ -135,27 +139,31 @@ TRACE_EVENT(mm_collapse_huge_page_isolate, __entry->referenced =3D referenced; __entry->writable =3D writable; __entry->status =3D status; + __entry->order =3D order; ), =20 - TP_printk("scan_pfn=3D0x%lx, none_or_zero=3D%d, referenced=3D%d, writable= =3D%d, status=3D%s", + TP_printk("scan_pfn=3D0x%lx, none_or_zero=3D%d, referenced=3D%d, writable= =3D%d, status=3D%s order=3D%d", __entry->pfn, __entry->none_or_zero, __entry->referenced, __entry->writable, - __print_symbolic(__entry->status, SCAN_STATUS)) + __print_symbolic(__entry->status, SCAN_STATUS), + __entry->order) ); =20 TRACE_EVENT(mm_collapse_huge_page_swapin, =20 - TP_PROTO(struct mm_struct *mm, int swapped_in, int referenced, int ret), + TP_PROTO(struct mm_struct *mm, int swapped_in, int referenced, int ret, + int order), =20 - TP_ARGS(mm, swapped_in, referenced, ret), + TP_ARGS(mm, swapped_in, referenced, ret, order), =20 TP_STRUCT__entry( __field(struct mm_struct *, mm) __field(int, swapped_in) __field(int, referenced) __field(int, ret) + __field(int, order) ), =20 TP_fast_assign( @@ -163,13 +171,15 @@ TRACE_EVENT(mm_collapse_huge_page_swapin, __entry->swapped_in =3D swapped_in; __entry->referenced =3D referenced; __entry->ret =3D ret; + __entry->order =3D order; ), =20 - TP_printk("mm=3D%p, swapped_in=3D%d, referenced=3D%d, ret=3D%d", + TP_printk("mm=3D%p, swapped_in=3D%d, referenced=3D%d, ret=3D%d, order=3D%= d", __entry->mm, __entry->swapped_in, __entry->referenced, - __entry->ret) + __entry->ret, + __entry->order) ); =20 TRACE_EVENT(mm_khugepaged_scan_file, diff --git a/mm/khugepaged.c b/mm/khugepaged.c index cd310989725b..e2ba18e57064 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -713,13 +713,14 @@ static int __collapse_huge_page_isolate(struct vm_are= a_struct *vma, } else { result =3D SCAN_SUCCEED; trace_mm_collapse_huge_page_isolate(&folio->page, none_or_zero, - referenced, writable, result); + referenced, writable, result, + order); return result; } out: release_pte_pages(pte, _pte, compound_pagelist); trace_mm_collapse_huge_page_isolate(&folio->page, none_or_zero, - referenced, writable, result); + referenced, writable, result, order); return result; } =20 @@ -1088,7 +1089,8 @@ static int __collapse_huge_page_swapin(struct mm_stru= ct *mm, =20 result =3D SCAN_SUCCEED; out: - trace_mm_collapse_huge_page_swapin(mm, swapped_in, referenced, result); + trace_mm_collapse_huge_page_swapin(mm, swapped_in, referenced, result, + order); return result; } =20 @@ -1305,7 +1307,7 @@ static int collapse_huge_page(struct mm_struct *mm, u= nsigned long address, *mmap_locked =3D false; if (folio) folio_put(folio); - trace_mm_collapse_huge_page(mm, result =3D=3D SCAN_SUCCEED, result); + trace_mm_collapse_huge_page(mm, result =3D=3D SCAN_SUCCEED, result, order= ); return result; } =20 --=20 2.48.1