From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EE82EC43458 for ; Tue, 30 Jun 2026 01:53:55 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id B96CC6B00A3; Mon, 29 Jun 2026 21:53:54 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id B6E3B6B00A6; Mon, 29 Jun 2026 21:53:54 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A36346B00A8; Mon, 29 Jun 2026 21:53:54 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 70E646B00A3 for ; Mon, 29 Jun 2026 21:53:54 -0400 (EDT) Received: from smtpin07.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay05.hostedemail.com (Postfix) with ESMTP id C98CC40154 for ; Tue, 30 Jun 2026 01:53:53 +0000 (UTC) X-FDA: 84934907946.07.D3114DB Received: from out-189.mta1.migadu.com (out-189.mta1.migadu.com [95.215.58.189]) by imf07.hostedemail.com (Postfix) with ESMTP id 340F240003 for ; Tue, 30 Jun 2026 01:53:52 +0000 (UTC) Authentication-Results: imf07.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=TMgXlUlz; spf=pass (imf07.hostedemail.com: domain of ye.liu@linux.dev designates 95.215.58.189 as permitted sender) smtp.mailfrom=ye.liu@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1782784432; b=MWA/LXJI+/fFO2WeSwlwAAg3J6U3xdB5KayYxGMitNd+Z9ChvUhgFqlmEIgOnQWiflHQRU hp/5Hmafo3mFIcjxhcO+spNBlJWZzWt6m3nQuhy/KHe7/LxFNcLEvPuqAew9d9im8Teq04 VOnz0dr1SamAwhN5qH+OencBzkWHJzA= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1782784432; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=o+9YrpEU34OPDz2iHabTDbvzWefArLaf4fpVcXgkiMk=; b=BUZLzr3PFv6sQbT7tM9APrmIZBms3waUAetWjn/1pBctC0pPM1HSAW2fpUS3rvRr97EjWr RSlJRM8/5mbHgU0UCVthv24P3PTVFKMnUUQnabvQvzxZaDMTrGoRxGWHNT6BQPhAgh18zq IQjz9tdC/M7CJ/IiW6WwXkV7yTnfiLI= ARC-Authentication-Results: i=1; imf07.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=TMgXlUlz; spf=pass (imf07.hostedemail.com: domain of ye.liu@linux.dev designates 95.215.58.189 as permitted sender) smtp.mailfrom=ye.liu@linux.dev; dmarc=pass (policy=none) header.from=linux.dev X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1782784430; 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=o+9YrpEU34OPDz2iHabTDbvzWefArLaf4fpVcXgkiMk=; b=TMgXlUlzodF1IoLeynZ74eaIyV4U7rjvQXiu7RJXnASDsdrob6kxCYb1iZ3Oj2sGEoImCo PpbCJQ3Y7D4H1RmilH3Ccx34B3/dsJZlglzP80/GxM6U5g9lqjT0ZKC4rAuGD3D7z53R4e iFzxQ+Akjbb+4xLM01Ojlc64dPgqoAM= From: Ye Liu To: Andrew Morton , David Hildenbrand , Steven Rostedt , Masami Hiramatsu , Vlastimil Babka Cc: Ye Liu , Zi Yan , Matthew Brost , Joshua Hahn , Rakie Kim , Byungchul Park , Gregory Price , Ying Huang , Alistair Popple , Mathieu Desnoyers , Suren Baghdasaryan , Michal Hocko , Brendan Jackman , Johannes Weiner , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org Subject: [PATCH v3 2/7] mm/page_owner: add MR_NEVER to enum migrate_reason and use it for last_migrate_reason Date: Tue, 30 Jun 2026 09:53:19 +0800 Message-ID: <20260630015331.147174-3-ye.liu@linux.dev> In-Reply-To: <20260630015331.147174-1-ye.liu@linux.dev> References: <20260630015331.147174-1-ye.liu@linux.dev> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Rspam-User: X-Stat-Signature: 8w43fndmurfcwx7odg8spud1peyig8s5 X-Rspamd-Queue-Id: 340F240003 X-Rspamd-Server: rspam06 X-HE-Tag: 1782784432-588473 X-HE-Meta: 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 JBBBN1Gl 10fJr6Kpt//GjFgOvJ2Mv3m7pKVoy1Eu0c+Ckxm6k+xWgMmw1BhMadNUDaiknjJ8rg0N7zsgXlf/Qt1LQea22AL+awLJ3mmmXG+MdVUoJejnZ1eF0yTvEv3NE+NTslutbsVVMpN2Owhf5ed0x4zPHJh66jg1065gTRRYeXughCeaEq86mBC/sqWvJeLFqogUUfSIO9Px9HV20sPtyIlTyXOhyIbDjcUBAHKedvIH27nyvEuJZ+4a/MsEM4nHDExiKaIbXXwHYtA0w7qWnyj7/WScQdRRjGYc1f64jLnD8Y9x6brs/zD5QU1zh9M1xBqoDE60L Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: The last_migrate_reason field uses -1 as a sentinel value to mean "no migration has happened". Replace the four bare -1 occurrences by adding a proper MR_NEVER member to enum migrate_reason, defining a corresponding "never_migrated" string in the MIGRATE_REASON trace macro, and removing the local MIGRATE_REASON_NONE define. No functional change. Signed-off-by: Ye Liu --- include/linux/migrate_mode.h | 1 + include/trace/events/migrate.h | 3 ++- mm/page_owner.c | 8 ++++---- 3 files changed, 7 insertions(+), 5 deletions(-) diff --git a/include/linux/migrate_mode.h b/include/linux/migrate_mode.h index 265c4328b36a..05102d4d2490 100644 --- a/include/linux/migrate_mode.h +++ b/include/linux/migrate_mode.h @@ -25,6 +25,7 @@ enum migrate_reason { MR_LONGTERM_PIN, MR_DEMOTION, MR_DAMON, + MR_NEVER, /* page has never been migrated */ MR_TYPES }; diff --git a/include/trace/events/migrate.h b/include/trace/events/migrate.h index cd01dd7b3640..11bc0aa14c7e 100644 --- a/include/trace/events/migrate.h +++ b/include/trace/events/migrate.h @@ -23,7 +23,8 @@ EM( MR_CONTIG_RANGE, "contig_range") \ EM( MR_LONGTERM_PIN, "longterm_pin") \ EM( MR_DEMOTION, "demotion") \ - EMe(MR_DAMON, "damon") + EM( MR_DAMON, "damon") \ + EMe(MR_NEVER, "never_migrated") /* * First define the enums in the above macros to be exported to userspace diff --git a/mm/page_owner.c b/mm/page_owner.c index 342549891a8d..c2f43ab860eb 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -339,7 +339,7 @@ noinline void __set_page_owner(struct page *page, unsigned short order, depot_stack_handle_t handle; handle = save_stack(gfp_mask); - __update_page_owner_handle(page, handle, order, gfp_mask, -1, + __update_page_owner_handle(page, handle, order, gfp_mask, MR_NEVER, ts_nsec, current->pid, current->tgid, current->comm); inc_stack_record_count(handle, gfp_mask, 1 << order); @@ -596,7 +596,7 @@ print_page_owner(char __user *buf, size_t count, unsigned long pfn, if (ret >= count) goto err; - if (page_owner->last_migrate_reason != -1) { + if (page_owner->last_migrate_reason != MR_NEVER) { ret += scnprintf(kbuf + ret, count - ret, "Page has been migrated, last migrate reason: %s\n", migrate_reason_names[page_owner->last_migrate_reason]); @@ -667,7 +667,7 @@ void __dump_page_owner(const struct page *page) stack_depot_print(handle); } - if (page_owner->last_migrate_reason != -1) + if (page_owner->last_migrate_reason != MR_NEVER) pr_alert("page has been migrated, last migrate reason: %s\n", migrate_reason_names[page_owner->last_migrate_reason]); page_ext_put(page_ext); @@ -826,7 +826,7 @@ static void init_pages_in_zone(struct zone *zone) /* Found early allocated page */ __update_page_owner_handle(page, early_handle, 0, 0, - -1, local_clock(), current->pid, + MR_NEVER, local_clock(), current->pid, current->tgid, current->comm); count++; ext_put_continue: -- 2.43.0