From mboxrd@z Thu Jan 1 00:00:00 1970 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 7B7D94C9016 for ; Mon, 11 May 2026 19:01:13 +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=1778526074; cv=none; b=SRuFHHnDNDmyqy3RZdnSym5R0b8z2AOiXb0LIVk7tvE/AVjA+6vT+Br9ClcVtZGb9NfPcwHwcWLIw+O1aSwEhiyIwhcOcxb5n6czseTJp8RQF6V4UIlHpQFwg7s5Slc8xM5h+kYOyAJV28i855KGomCyuwJGWc+IkPvROtfgBS0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778526074; c=relaxed/simple; bh=NEKXOp29ElGDfgd2KF4LOfY11/GRS1TZMTzRmZUyU6I=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:content-type; b=ZNSX1PkJ82/J/KRn57g1b9WYaAm1qMATjSmuIc9mJnUTq2qT9S2fjyu1eIDPG7ElBL7CDz33UPLivfnDuNxv+9fm+gUxu97a2KscklyY0rcwgK6SBfZqztzoLfetR0yK8X5kan15dKvinGR9ov0sTy9rMuum1Jz9p+GL4l1aQMM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine 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=eUSbWVPn; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine 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="eUSbWVPn" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1778526072; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=uKalnTJU5FPuLj6iiEUKCdnXzBUcvwu0YQrUwlp5/tY=; b=eUSbWVPnXokfOd0kFNB3fAboSQZHmy45FP8QfCeqsoofVFwVmXFuQo7skqmSVQP58CQlZQ GMX9Kd7FQoPb01I9xONhG1u3zFrifoi5ct8rhhTG8KtzPo/eLaoqqVypr/jBacE05P35Fu VYYsUcf9G25PxtXllGgPk0pKfZqmIwg= Received: from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-126-dYubUeAkO1S-b6eeGxY1WA-1; Mon, 11 May 2026 15:01:10 -0400 X-MC-Unique: dYubUeAkO1S-b6eeGxY1WA-1 X-Mimecast-MFC-AGG-ID: dYubUeAkO1S-b6eeGxY1WA_1778526068 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (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-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id E0E431800367; Mon, 11 May 2026 19:01:07 +0000 (UTC) Received: from p1.redhat.com (unknown [10.44.22.3]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 96A8F3002D30; Mon, 11 May 2026 19:00:49 +0000 (UTC) From: Nico Pache To: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org Cc: aarcange@redhat.com, akpm@linux-foundation.org, anshuman.khandual@arm.com, apopple@nvidia.com, baohua@kernel.org, baolin.wang@linux.alibaba.com, byungchul@sk.com, catalin.marinas@arm.com, cl@gentwo.org, corbet@lwn.net, dave.hansen@linux.intel.com, david@kernel.org, dev.jain@arm.com, gourry@gourry.net, hannes@cmpxchg.org, hughd@google.com, jack@suse.cz, jackmanb@google.com, jannh@google.com, jglisse@google.com, joshua.hahnjy@gmail.com, kas@kernel.org, lance.yang@linux.dev, liam@infradead.org, ljs@kernel.org, mathieu.desnoyers@efficios.com, matthew.brost@intel.com, mhiramat@kernel.org, mhocko@suse.com, npache@redhat.com, peterx@redhat.com, pfalcato@suse.de, rakie.kim@sk.com, raquini@redhat.com, rdunlap@infradead.org, richard.weiyang@gmail.com, rientjes@google.com, rostedt@goodmis.org, rppt@kernel.org, ryan.roberts@arm.com, shivankg@amd.com, sunnanyong@huawei.com, surenb@google.com, thomas.hellstrom@linux.intel.com, tiwai@suse.de, usamaarif642@gmail.com, vbabka@suse.cz, vishal.moola@gmail.com, wangkefeng.wang@huawei.com, will@kernel.org, willy@infradead.org, yang@os.amperecomputing.com, ying.huang@linux.alibaba.com, ziy@nvidia.com, zokeefe@google.com Subject: [PATCH mm-unstable v17 09/14] mm/khugepaged: improve tracepoints for mTHP orders Date: Mon, 11 May 2026 12:58:09 -0600 Message-ID: <20260511185817.686831-10-npache@redhat.com> In-Reply-To: <20260511185817.686831-1-npache@redhat.com> References: <20260511185817.686831-1-npache@redhat.com> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 X-Mimecast-MFC-PROC-ID: RZQh4yLsyjI7eoDIJoQLdaJJs_18UorHs5WKICBD0Io_1778526068 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true Add the order to the mm_collapse_huge_page<_swapin,_isolate> tracepoints to give better insight into what order is being operated at for. Reviewed-by: Lorenzo Stoakes Reviewed-by: Baolin Wang Acked-by: David Hildenbrand (Arm) Signed-off-by: Nico Pache --- include/trace/events/huge_memory.h | 34 +++++++++++++++++++----------- mm/khugepaged.c | 9 ++++---- 2 files changed, 27 insertions(+), 16 deletions(-) diff --git a/include/trace/events/huge_memory.h b/include/trace/events/huge_memory.h index 443e0bd13fdb..70c25136e7e8 100644 --- a/include/trace/events/huge_memory.h +++ b/include/trace/events/huge_memory.h @@ -90,40 +90,44 @@ TRACE_EVENT(mm_khugepaged_scan_pmd, TRACE_EVENT(mm_collapse_huge_page, - TP_PROTO(struct mm_struct *mm, int isolated, int status), + TP_PROTO(struct mm_struct *mm, int isolated, int status, unsigned int order), - TP_ARGS(mm, isolated, status), + TP_ARGS(mm, isolated, status, order), TP_STRUCT__entry( __field(struct mm_struct *, mm) __field(int, isolated) __field(int, status) + __field(unsigned int, order) ), TP_fast_assign( __entry->mm = mm; __entry->isolated = isolated; __entry->status = status; + __entry->order = order; ), - TP_printk("mm=%p, isolated=%d, status=%s", + TP_printk("mm=%p, isolated=%d, status=%s, order=%u", __entry->mm, __entry->isolated, - __print_symbolic(__entry->status, SCAN_STATUS)) + __print_symbolic(__entry->status, SCAN_STATUS), + __entry->order) ); TRACE_EVENT(mm_collapse_huge_page_isolate, TP_PROTO(struct folio *folio, int none_or_zero, - int referenced, int status), + int referenced, int status, unsigned int order), - TP_ARGS(folio, none_or_zero, referenced, status), + TP_ARGS(folio, none_or_zero, referenced, status, order), TP_STRUCT__entry( __field(unsigned long, pfn) __field(int, none_or_zero) __field(int, referenced) __field(int, status) + __field(unsigned int, order) ), TP_fast_assign( @@ -131,26 +135,30 @@ TRACE_EVENT(mm_collapse_huge_page_isolate, __entry->none_or_zero = none_or_zero; __entry->referenced = referenced; __entry->status = status; + __entry->order = order; ), - TP_printk("scan_pfn=0x%lx, none_or_zero=%d, referenced=%d, status=%s", + TP_printk("scan_pfn=0x%lx, none_or_zero=%d, referenced=%d, status=%s, order=%u", __entry->pfn, __entry->none_or_zero, __entry->referenced, - __print_symbolic(__entry->status, SCAN_STATUS)) + __print_symbolic(__entry->status, SCAN_STATUS), + __entry->order) ); TRACE_EVENT(mm_collapse_huge_page_swapin, - 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, + unsigned int order), - TP_ARGS(mm, swapped_in, referenced, ret), + TP_ARGS(mm, swapped_in, referenced, ret, order), TP_STRUCT__entry( __field(struct mm_struct *, mm) __field(int, swapped_in) __field(int, referenced) __field(int, ret) + __field(unsigned int, order) ), TP_fast_assign( @@ -158,13 +166,15 @@ TRACE_EVENT(mm_collapse_huge_page_swapin, __entry->swapped_in = swapped_in; __entry->referenced = referenced; __entry->ret = ret; + __entry->order = order; ), - TP_printk("mm=%p, swapped_in=%d, referenced=%d, ret=%d", + TP_printk("mm=%p, swapped_in=%d, referenced=%d, ret=%d, order=%u", __entry->mm, __entry->swapped_in, __entry->referenced, - __entry->ret) + __entry->ret, + __entry->order) ); TRACE_EVENT(mm_khugepaged_scan_file, diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 27654ea3f5ca..f28066069437 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -779,13 +779,13 @@ static enum scan_result __collapse_huge_page_isolate(struct vm_area_struct *vma, } else { result = SCAN_SUCCEED; trace_mm_collapse_huge_page_isolate(folio, none_or_zero, - referenced, result); + referenced, result, order); return result; } out: release_pte_pages(pte, _pte, compound_pagelist); trace_mm_collapse_huge_page_isolate(folio, none_or_zero, - referenced, result); + referenced, result, order); return result; } @@ -1181,7 +1181,8 @@ static enum scan_result __collapse_huge_page_swapin(struct mm_struct *mm, result = 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; } @@ -1390,7 +1391,7 @@ static enum scan_result collapse_huge_page(struct mm_struct *mm, unsigned long s out_nolock: if (folio) folio_put(folio); - trace_mm_collapse_huge_page(mm, result == SCAN_SUCCEED, result); + trace_mm_collapse_huge_page(mm, result == SCAN_SUCCEED, result, order); return result; } -- 2.54.0