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Tue, 30 Jul 2019 13:14:59 +0000 Received: from VI1PR05MB4141.eurprd05.prod.outlook.com ([fe80::5c6f:6120:45cd:2880]) by VI1PR05MB4141.eurprd05.prod.outlook.com ([fe80::5c6f:6120:45cd:2880%4]) with mapi id 15.20.2115.005; Tue, 30 Jul 2019 13:14:58 +0000 From: Jason Gunthorpe To: Christoph Hellwig CC: =?iso-8859-1?Q?J=E9r=F4me_Glisse?= , Ben Skeggs , Felix Kuehling , Ralph Campbell , "linux-mm@kvack.org" , "nouveau@lists.freedesktop.org" , "dri-devel@lists.freedesktop.org" , "amd-gfx@lists.freedesktop.org" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH 03/13] nouveau: pass struct nouveau_svmm to nouveau_range_fault Thread-Topic: [PATCH 03/13] nouveau: pass struct nouveau_svmm to nouveau_range_fault Thread-Index: AQHVRpr4kL6aKlcudUqEUBBy4/lXjabjGXIAgAAJtACAAAExAA== Date: Tue, 30 Jul 2019 13:14:58 +0000 Message-ID: <20190730131454.GG24038@mellanox.com> References: <20190730055203.28467-1-hch@lst.de> <20190730055203.28467-4-hch@lst.de> <20190730123554.GD24038@mellanox.com> <20190730131038.GB4566@lst.de> In-Reply-To: <20190730131038.GB4566@lst.de> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: YQXPR0101CA0007.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:c00:15::20) To VI1PR05MB4141.eurprd05.prod.outlook.com (2603:10a6:803:4d::16) authentication-results: spf=none (sender IP is ) smtp.mailfrom=jgg@mellanox.com; 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received-spf: None (protection.outlook.com: mellanox.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: mG8LV/6niYle0ZfCKqOsSXVNrQ8TsIEpZPZqLtc80iGAge6QFyZsPbO30d+w3zdHDTEbD3U6wHgrvsPxKUMejwgk+w1i9GxHsu1wuIVJa0S5iRpKEjH90e5zi+s/3+gRx5AHYU+OeLLboPMXlrPOYCThmhXaZdDTxKJYeN1e02y099G/gaySkSr+sG88WiJQari78KQ/O1YAdV6b0mFHtNbEyv9g1PzFaEne7NAS/Tn0ypDFQQtG3k+P09mmNpwFr4Y1HXZAJm5fC7pJCML7w+0xdH1tjfhXcUNJIReXF7/mSduVlhTx5f4b4eUMed/wNqK33lbMvZ6Cpuu+wq5ZKRwAbWKtdisCmbKE4lDTZBGlqIt+GeEG5xbxh2gO/ASl9WiZt4YsXdBGriWoxOEUVDFJrWRKV2AxKVnJIw2ma0U= Content-Type: text/plain; charset="iso-8859-1" Content-ID: <9EFBC7D2033F0A4F9278F6401B93A640@eurprd05.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: Mellanox.com X-MS-Exchange-CrossTenant-Network-Message-Id: 567c83d6-26ec-4ba9-1306-08d714efec1a X-MS-Exchange-CrossTenant-originalarrivaltime: 30 Jul 2019 13:14:58.8754 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: a652971c-7d2e-4d9b-a6a4-d149256f461b X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: jgg@mellanox.com X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR05MB4288 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, Jul 30, 2019 at 03:10:38PM +0200, Christoph Hellwig wrote: > On Tue, Jul 30, 2019 at 12:35:59PM +0000, Jason Gunthorpe wrote: > > On Tue, Jul 30, 2019 at 08:51:53AM +0300, Christoph Hellwig wrote: > > > This avoid having to abuse the vma field in struct hmm_range to unloc= k > > > the mmap_sem. > >=20 > > I think the change inside hmm_range_fault got lost on rebase, it is > > now using: > >=20 > > up_read(&range->hmm->mm->mmap_sem); > >=20 > > But, yes, lets change it to use svmm->mm and try to keep struct hmm > > opaque to drivers >=20 > It got lost somewhat intentionally as I didn't want the churn, but I > forgot to update the changelog. But if you are fine with changing it > over I can bring it back. I have a patch deleting hmm->mm, so using svmm seems cleaner churn here, we could defer and I can fold this into that patch? Jason