From nobody Fri Apr 3 02:23:00 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D4D86ECAAA1 for ; Sat, 17 Sep 2022 02:13:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229602AbiIQCNX (ORCPT ); Fri, 16 Sep 2022 22:13:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51266 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229379AbiIQCNU (ORCPT ); Fri, 16 Sep 2022 22:13:20 -0400 Received: from mail-pf1-x42e.google.com (mail-pf1-x42e.google.com [IPv6:2607:f8b0:4864:20::42e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A006CBC831 for ; Fri, 16 Sep 2022 19:13:17 -0700 (PDT) Received: by mail-pf1-x42e.google.com with SMTP id e68so22913208pfe.1 for ; Fri, 16 Sep 2022 19:13:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date; bh=O/wHfSygLsTDmbVML9jL5HVnMqDKxLwyjweHfisFexo=; b=hkpFE9dY8zc+Tj/9KFsk0wgqf7HV2Vezb5hXqx4WGnDt6gWbT8Oo2Mm/WniNar0pjZ axB4dbEGB4QUVsmTeFErEpIpUoOK+9fHkROm67WOLblpmqgjMoGBpUNsaB/0cWDEcvZP 6Jw8EIKe/7w3+jCTuy2gt1cMlwCaMbzVBkDiMMSXFmlXRauiQpcRy/XIwSiT6QtelneC 8LEfZwtbUlvV6Jpb7W9DxRKSzG3oTthsYAZmAsV9bEyQpF0sXHtt5ham7Da91bzhppLx AY6DtdzzaUHtLmU5YIVJsCGL/x3G2wGU+3xq3Ckv7QU8hzbrDXe0LNWaClm54Q35Rp3B Wp0A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date; bh=O/wHfSygLsTDmbVML9jL5HVnMqDKxLwyjweHfisFexo=; b=ELTBXathHA0bWGO0LSCjvjwI3kDEJMHAkzlpmRqmQj2LRRJxNzrEnJALJ9xgDXIAUI LSNZ4V6qsqEWYFMWOSCtQV+Xp/MmZ7ShD3ZNA8hXtbZemq2V4pTRwn9rEZC8/AmNenX+ sSN/d7nvcPkX6ZCuYE0RVwIYF8LQpu2FehSobHNZAm3OTt6oNgvqvb6VdHUe1CU1rB2I pLobY2v1UEVlVFf/Xt9dTMGgIlYL5/wAz6CVToMPy4lyTC1zk3eopJ9KjssC849UWXe2 wOea/snWt22YYH8DTvABwHfuvzO8Z43nnjrNcIzSumVk5bPd7up0+o3HrYMBh1kHdQyp E0hA== X-Gm-Message-State: ACrzQf0Kota0EiLyHXC+4UFGu+TluFZGSiZJ+t5jEXAxc48fEEnd8HST Ma2MXOqZvVbolfdef3qNuFzSs8DWk190cg== X-Google-Smtp-Source: AMsMyM4wSunl1Ehj83giXSNRzm8v0AxUUnGmsIK5jCr7OOe0AbFT0IYYcCJ0U4URWNWErqSPiRxzNQ== X-Received: by 2002:a63:1349:0:b0:438:fa5a:b6f1 with SMTP id 9-20020a631349000000b00438fa5ab6f1mr7201270pgt.250.1663380796804; Fri, 16 Sep 2022 19:13:16 -0700 (PDT) Received: from localhost.localdomain (lily-optiplex-3070.dynamic.ucsd.edu. [2607:f720:1300:3033::1:4dd]) by smtp.googlemail.com with ESMTPSA id oj5-20020a17090b4d8500b0020263b7177csm9753575pjb.3.2022.09.16.19.13.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 16 Sep 2022 19:13:15 -0700 (PDT) From: Li Zhong To: linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: akpm@linux-foundation.org, Li Zhong Subject: [PATCH v1] mm/vmscan: check the return value of migrate_pages() Date: Fri, 16 Sep 2022 19:12:57 -0700 Message-Id: <20220917021257.3840548-1-floridsleeves@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Check the return value of migrate_pages() to check error exeuction. Signed-off-by: Li Zhong Reported-by: kernel test robot --- mm/vmscan.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index b2b1431352dc..50aaaa9377e2 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1547,6 +1547,7 @@ static unsigned int demote_page_list(struct list_head= *demote_pages, { int target_nid =3D next_demotion_node(pgdat->node_id); unsigned int nr_succeeded; + int ret; =20 if (list_empty(demote_pages)) return 0; @@ -1555,10 +1556,13 @@ static unsigned int demote_page_list(struct list_he= ad *demote_pages, return 0; =20 /* Demotion ignores all cpuset and mempolicy settings */ - migrate_pages(demote_pages, alloc_demote_page, NULL, + ret =3D migrate_pages(demote_pages, alloc_demote_page, NULL, target_nid, MIGRATE_ASYNC, MR_DEMOTION, &nr_succeeded); =20 + if (ret) + putback_movable_pages(&pagelist); + if (current_is_kswapd()) __count_vm_events(PGDEMOTE_KSWAPD, nr_succeeded); else --=20 2.25.1