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Tue, 17 Aug 2021 15:47:58 +0000 From: Liam Howlett To: "maple-tree@lists.infradead.org" , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , Andrew Morton CC: Song Liu , Davidlohr Bueso , "Paul E . McKenney" , Matthew Wilcox , Laurent Dufour , David Rientjes , Axel Rasmussen , Suren Baghdasaryan , Vlastimil Babka , Rik van Riel , Peter Zijlstra , Michel Lespinasse , Liam Howlett Subject: [PATCH v2 57/61] mm/oom_kill: Use maple tree iterators instead of vma linked list Thread-Topic: [PATCH v2 57/61] mm/oom_kill: Use maple tree iterators instead of vma linked list Thread-Index: AQHXk38xccKM7ah0Lkmm8L45r57zWg== Date: Tue, 17 Aug 2021 15:47:33 +0000 Message-ID: <20210817154651.1570984-58-Liam.Howlett@oracle.com> References: <20210817154651.1570984-1-Liam.Howlett@oracle.com> In-Reply-To: <20210817154651.1570984-1-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: 74ee029f-0cc3-40eb-e71a-08d96196635c x-ms-traffictypediagnostic: DM6PR10MB3580: x-ms-exchange-transport-forked: True 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: DM6PR10MB4380.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 74ee029f-0cc3-40eb-e71a-08d96196635c X-MS-Exchange-CrossTenant-originalarrivaltime: 17 Aug 2021 15:47:33.1926 (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: ug+QWEzeugI3COC3cTLZg/g5svdyIr5QltdgOkq9r6/34ACMKdWl1/gq7N6tS+4oCMgVLFj3AGXSMs8M30H/fg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR10MB3580 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=10079 signatures=668682 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 adultscore=0 bulkscore=0 suspectscore=0 mlxlogscore=999 phishscore=0 mlxscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2107140000 definitions=main-2108170097 X-Proofpoint-ORIG-GUID: z9nhQQqgdVbxOHyOMnuUEr9GULANq8kB X-Proofpoint-GUID: z9nhQQqgdVbxOHyOMnuUEr9GULANq8kB 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 431d38c3bba8..40a01f334735 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -519,6 +519,7 @@ 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 @@ -528,7 +529,8 @@ 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 @@ -560,6 +562,7 @@ bool __oom_reap_task_mm(struct mm_struct *mm) tlb_finish_mmu(&tlb); } } + rcu_read_unlock(); =20 return ret; } --=20 2.30.2