From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 5327837AA88 for ; Thu, 22 Jan 2026 19:31:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769110330; cv=none; b=Sm/SQJvSSMb1DaUSVINHNKeEBWJiIOKn+blSYfTP0Ki+eRPcSfU1Qw8b1GCYhTvZn9hP3E8TSIi5urJDQgkGGMDSBes2Ucb9kcrLuXxe2mYR8mJh0sJaIHhsuSWyzwcXsX85bsn9b1921oTH4JdNztGUcpA6kPHPT58mex4wkCE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769110330; c=relaxed/simple; bh=Z1iD1TTm98H/I3c6oDdYUQSvch+A5HauD3woGIDbZ7A=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=eHF27kty6ion3j/BcTGaGTO5wm+tbXwCPaNJbFExJ0sf+hvmfyqQa2+cwxaT0UnsMNglbEy2eiJyv0T+rDeMCTE6uE6bXDeeXfSQ9t6IcbcGU6wnDtXwiwgzKvqWKenfn2zRzYdfFj458EBpO4uHa1j7A92iGQxfqa34SJpt8NA= 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=c5vnFwKm; arc=none smtp.client-ip=170.10.129.124 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="c5vnFwKm" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1769110314; 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=FYYlse+kS0J3Xm+psz9vJ/SdkHQSC+eVDJpTvkyTwMM=; b=c5vnFwKmrOKIXfO/SUUBp3uqkZexTcUHhqo3e1AAvJzWfd4bAQOarqykZO+OfVi8jLQvhO oj7mDiXnnxoAsXNbGAwufAEotqbU0IzMBq6PoH4l2K4G0+N52SQ5kXnirxcSM/H7bNoBi2 8z0DXF+YpT3YFNCHpRKwpy8zZ3AUtl8= Received: from mx-prod-mc-06.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-367-vPyl76d2M2uK5E2-m-SbAw-1; Thu, 22 Jan 2026 14:31:52 -0500 X-MC-Unique: vPyl76d2M2uK5E2-m-SbAw-1 X-Mimecast-MFC-AGG-ID: vPyl76d2M2uK5E2-m-SbAw_1769110311 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (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-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 428A718005AD; Thu, 22 Jan 2026 19:31:51 +0000 (UTC) Received: from h1.redhat.com (unknown [10.22.88.59]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id E4D601958DC1; Thu, 22 Jan 2026 19:31:41 +0000 (UTC) From: Nico Pache To: linux-mm@kvack.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org Cc: npache@redhat.com, akpm@linux-foundation.org, david@kernel.org, lorenzo.stoakes@oracle.com, ziy@nvidia.com, baolin.wang@linux.alibaba.com, Liam.Howlett@oracle.com, ryan.roberts@arm.com, dev.jain@arm.com, baohua@kernel.org, lance.yang@linux.dev, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com, corbet@lwn.net, rostedt@goodmis.org, mhiramat@kernel.org, mathieu.desnoyers@efficios.com, matthew.brost@intel.com, joshua.hahnjy@gmail.com, rakie.kim@sk.com, byungchul@sk.com, gourry@gourry.net, ying.huang@linux.alibaba.com, apopple@nvidia.com, jannh@google.com, pfalcato@suse.de, jackmanb@google.com, hannes@cmpxchg.org, willy@infradead.org, peterx@redhat.com, wangkefeng.wang@huawei.com, usamaarif642@gmail.com, sunnanyong@huawei.com, vishal.moola@gmail.com, thomas.hellstrom@linux.intel.com, yang@os.amperecomputing.com, kas@kernel.org, aarcange@redhat.com, raquini@redhat.com, anshuman.khandual@arm.com, catalin.marinas@arm.com, tiwai@suse.de, will@kernel.org, dave.hansen@linux.intel.com, jack@suse.cz, cl@gentwo.org, jglisse@google.com, zokeefe@google.com, rientjes@google.com, rdunlap@infradead.org, hughd@google.com, richard.weiyang@gmail.com, David Hildenbrand Subject: [PATCH mm-unstable v14 11/16] khugepaged: improve tracepoints for mTHP orders Date: Thu, 22 Jan 2026 12:28:36 -0700 Message-ID: <20260122192841.128719-12-npache@redhat.com> In-Reply-To: <20260122192841.128719-1-npache@redhat.com> References: <20260122192841.128719-1-npache@redhat.com> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 Add the order to the mm_collapse_huge_page<_swapin,_isolate> tracepoints to give better insight into what order is being operated at for. Acked-by: David Hildenbrand Reviewed-by: Lorenzo Stoakes Reviewed-by: Baolin Wang 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 4e41bff31888..942c82f2d0a4 100644 --- a/include/trace/events/huge_memory.h +++ b/include/trace/events/huge_memory.h @@ -88,40 +88,44 @@ 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( @@ -129,26 +133,30 @@ 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( @@ -156,13 +164,15 @@ 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 96f1c28646ba..e33b2594949d 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -732,13 +732,13 @@ 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; } @@ -1132,7 +1132,8 @@ 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; } @@ -1356,7 +1357,7 @@ static enum scan_result collapse_huge_page(struct mm_struct *mm, unsigned long s WARN_ON_ONCE(*mmap_locked); 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; } -- 2.52.0