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McKenney" , Matthew Wilcox , David Rientjes , Axel Rasmussen , Suren Baghdasaryan , Vlastimil Babka , Rik van Riel , Peter Zijlstra Subject: [PATCH v3 58/66] mm/oom_kill: Use maple tree iterators instead of vma linked list Thread-Topic: [PATCH v3 58/66] mm/oom_kill: Use maple tree iterators instead of vma linked list Thread-Index: AQHXuYisFGigQEVdzkGpPBKHaTZEYA== Date: Tue, 5 Oct 2021 01:31:08 +0000 Message-ID: <20211005012959.1110504-59-Liam.Howlett@oracle.com> References: <20211005012959.1110504-1-Liam.Howlett@oracle.com> In-Reply-To: <20211005012959.1110504-1-Liam.Howlett@oracle.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: git-send-email 2.30.2 authentication-results: lists.infradead.org; dkim=none (message not signed) header.d=none;lists.infradead.org; dmarc=none action=none header.from=oracle.com; x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 5d0088fa-563b-4741-e72f-08d9879fd976 x-ms-traffictypediagnostic: BLAPR10MB5044: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:208; 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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: BL0PR10MB3011.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 5d0088fa-563b-4741-e72f-08d9879fd976 X-MS-Exchange-CrossTenant-originalarrivaltime: 05 Oct 2021 01:31:08.7626 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: Y5YF6vBsDBx9Xi7wyx73ErCNL5K3v/OZkfJ/+qXyOT834uremitmCi+REAEbHtTQiIIUMTjjxAYJaE6dTVTcoQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BLAPR10MB5044 X-Proofpoint-Virus-Version: vendor=nai engine=6300 definitions=10127 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 adultscore=0 phishscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 suspectscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2109230001 definitions=main-2110050007 X-Proofpoint-GUID: e-H_qXuneRnpKD6uV4m_xYdNxy_KgvDb X-Proofpoint-ORIG-GUID: e-H_qXuneRnpKD6uV4m_xYdNxy_KgvDb Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Liam R. Howlett" Signed-off-by: Liam R. Howlett --- mm/oom_kill.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 831340e7ad8b..e0334667d36a 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -516,6 +516,7 @@ bool __oom_reap_task_mm(struct mm_struct *mm) { struct vm_area_struct *vma; bool ret =3D true; + MA_STATE(mas, &mm->mm_mt, 0, 0); =20 /* * Tell all users of get_user/copy_from_user etc... that the content @@ -525,7 +526,8 @@ bool __oom_reap_task_mm(struct mm_struct *mm) */ set_bit(MMF_UNSTABLE, &mm->flags); =20 - for (vma =3D mm->mmap ; vma; vma =3D vma->vm_next) { + rcu_read_lock(); + mas_for_each(&mas, vma, ULONG_MAX) { if (!can_madv_lru_vma(vma)) continue; =20 @@ -557,6 +559,7 @@ bool __oom_reap_task_mm(struct mm_struct *mm) tlb_finish_mmu(&tlb); } } + rcu_read_unlock(); =20 return ret; } --=20 2.30.2