From: John Hubbard Subject: [PATCH v6 07/24] IB/umem: use get_user_pages_fast() to pin DMA pages Date: Tue, 19 Nov 2019 00:16:26 -0800 Message-ID: <20191119081643.1866232-8-jhubbard@nvidia.com> References: <20191119081643.1866232-1-jhubbard@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from hqemgate16.nvidia.com (hqemgate16.nvidia.com [216.228.121.65]) by gabe.freedesktop.org (Postfix) with ESMTPS id 6C9116ECA3 for ; Tue, 19 Nov 2019 08:16:56 +0000 (UTC) In-Reply-To: <20191119081643.1866232-1-jhubbard@nvidia.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Andrew Morton Cc: Michal Hocko , Jan Kara , kvm@vger.kernel.org, linux-doc@vger.kernel.org, David Airlie , Dave Chinner , dri-devel@lists.freedesktop.org, LKML , linux-mm@kvack.org, Paul Mackerras , linux-kselftest@vger.kernel.org, Ira Weiny , Jonathan Corbet , linux-rdma@vger.kernel.org, Michael Ellerman , Christoph Hellwig , Jason Gunthorpe , Jason Gunthorpe , Vlastimil Babka , =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= , linux-media@vger.kernel.org, Shuah Khan , John Hubbard , linux-block@vger.kernel.org, =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= , Al Viro List-Id: dri-devel@lists.freedesktop.org QW5kIGdldCByaWQgb2YgdGhlIG1tYXBfc2VtIGNhbGxzLCBhcyBwYXJ0IG9mIHRoYXQuIE5vdGUK dGhhdCBnZXRfdXNlcl9wYWdlc19mYXN0KCkgd2lsbCwgaWYgbmVjZXNzYXJ5LCBmYWxsIGJhY2sg dG8KX19ndXBfbG9uZ3Rlcm1fdW5sb2NrZWQoKSwgd2hpY2ggdGFrZXMgdGhlIG1tYXBfc2VtIGFz IG5lZWRlZC4KClJldmlld2VkLWJ5OiBKYW4gS2FyYSA8amFja0BzdXNlLmN6PgpSZXZpZXdlZC1i eTogSmFzb24gR3VudGhvcnBlIDxqZ2dAbWVsbGFub3guY29tPgpSZXZpZXdlZC1ieTogSXJhIFdl aW55IDxpcmEud2VpbnlAaW50ZWwuY29tPgpTaWduZWQtb2ZmLWJ5OiBKb2huIEh1YmJhcmQgPGpo dWJiYXJkQG52aWRpYS5jb20+Ci0tLQogZHJpdmVycy9pbmZpbmliYW5kL2NvcmUvdW1lbS5jIHwg MTcgKysrKysrLS0tLS0tLS0tLS0KIDEgZmlsZSBjaGFuZ2VkLCA2IGluc2VydGlvbnMoKyksIDEx IGRlbGV0aW9ucygtKQoKZGlmZiAtLWdpdCBhL2RyaXZlcnMvaW5maW5pYmFuZC9jb3JlL3VtZW0u YyBiL2RyaXZlcnMvaW5maW5pYmFuZC9jb3JlL3VtZW0uYwppbmRleCAyNDI0NGEyZjY4Y2MuLjNk NjY0YTI1MzllYiAxMDA2NDQKLS0tIGEvZHJpdmVycy9pbmZpbmliYW5kL2NvcmUvdW1lbS5jCisr KyBiL2RyaXZlcnMvaW5maW5pYmFuZC9jb3JlL3VtZW0uYwpAQCAtMjcxLDE2ICsyNzEsMTMgQEAg c3RydWN0IGliX3VtZW0gKmliX3VtZW1fZ2V0KHN0cnVjdCBpYl91ZGF0YSAqdWRhdGEsIHVuc2ln bmVkIGxvbmcgYWRkciwKIAlzZyA9IHVtZW0tPnNnX2hlYWQuc2dsOwogCiAJd2hpbGUgKG5wYWdl cykgewotCQlkb3duX3JlYWQoJm1tLT5tbWFwX3NlbSk7Ci0JCXJldCA9IGdldF91c2VyX3BhZ2Vz KGN1cl9iYXNlLAotCQkJCSAgICAgbWluX3QodW5zaWduZWQgbG9uZywgbnBhZ2VzLAotCQkJCQkg ICBQQUdFX1NJWkUgLyBzaXplb2YgKHN0cnVjdCBwYWdlICopKSwKLQkJCQkgICAgIGd1cF9mbGFn cyB8IEZPTExfTE9OR1RFUk0sCi0JCQkJICAgICBwYWdlX2xpc3QsIE5VTEwpOwotCQlpZiAocmV0 IDwgMCkgewotCQkJdXBfcmVhZCgmbW0tPm1tYXBfc2VtKTsKKwkJcmV0ID0gZ2V0X3VzZXJfcGFn ZXNfZmFzdChjdXJfYmFzZSwKKwkJCQkJICBtaW5fdCh1bnNpZ25lZCBsb25nLCBucGFnZXMsCisJ CQkJCQlQQUdFX1NJWkUgLworCQkJCQkJc2l6ZW9mKHN0cnVjdCBwYWdlICopKSwKKwkJCQkJICBn dXBfZmxhZ3MgfCBGT0xMX0xPTkdURVJNLCBwYWdlX2xpc3QpOworCQlpZiAocmV0IDwgMCkKIAkJ CWdvdG8gdW1lbV9yZWxlYXNlOwotCQl9CiAKIAkJY3VyX2Jhc2UgKz0gcmV0ICogUEFHRV9TSVpF OwogCQlucGFnZXMgICAtPSByZXQ7CkBAIC0yODgsOCArMjg1LDYgQEAgc3RydWN0IGliX3VtZW0g KmliX3VtZW1fZ2V0KHN0cnVjdCBpYl91ZGF0YSAqdWRhdGEsIHVuc2lnbmVkIGxvbmcgYWRkciwK IAkJc2cgPSBpYl91bWVtX2FkZF9zZ190YWJsZShzZywgcGFnZV9saXN0LCByZXQsCiAJCQlkbWFf Z2V0X21heF9zZWdfc2l6ZShjb250ZXh0LT5kZXZpY2UtPmRtYV9kZXZpY2UpLAogCQkJJnVtZW0t PnNnX25lbnRzKTsKLQotCQl1cF9yZWFkKCZtbS0+bW1hcF9zZW0pOwogCX0KIAogCXNnX21hcmtf ZW5kKHNnKTsKLS0gCjIuMjQuMAoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX18KZHJpLWRldmVsIG1haWxpbmcgbGlzdApkcmktZGV2ZWxAbGlzdHMuZnJlZWRl c2t0b3Aub3JnCmh0dHBzOi8vbGlzdHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8v ZHJpLWRldmVs