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([2601:646:c200:1ef2:8e8:e217:43e7:e032]) by smtp.gmail.com with ESMTPSA id i25sm16435713pgb.33.2021.02.07.14.02.37 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 07 Feb 2021 14:02:37 -0800 (PST) From: Andy Lutomirski Mime-Version: 1.0 (1.0) Subject: Re: [RFC PATCH v3 1/2] mempinfd: Add new syscall to provide memory pin Date: Sun, 7 Feb 2021 14:02:36 -0800 Message-Id: References: <1612685884-19514-2-git-send-email-wangzhou1@hisilicon.com> In-Reply-To: <1612685884-19514-2-git-send-email-wangzhou1@hisilicon.com> To: Zhou Wang X-Mailer: iPhone Mail (18D52) Cc: jean-philippe@linaro.org, kevin.tian@intel.com, Sihang Chen , jgg@ziepe.ca, linux-api@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org, Alexander Viro , gregkh@linuxfoundation.org, zhangfei.gao@linaro.org, Andrew Morton , liguozhu@hisilicon.com, linux-arm-kernel@lists.infradead.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Cgo+IE9uIEZlYiA3LCAyMDIxLCBhdCAxMjozMSBBTSwgWmhvdSBXYW5nIDx3YW5nemhvdTFAaGlz aWxpY29uLmNvbT4gd3JvdGU6Cj4gCj4g77u/U1ZBKHNoYXJlIHZpcnR1YWwgYWRkcmVzcykgb2Zm ZXJzIGEgd2F5IGZvciBkZXZpY2UgdG8gc2hhcmUgcHJvY2VzcyB2aXJ0dWFsCj4gYWRkcmVzcyBz cGFjZSBzYWZlbHksIHdoaWNoIG1ha2VzIG1vcmUgY29udmVuaWVudCBmb3IgdXNlciBzcGFjZSBk ZXZpY2UKPiBkcml2ZXIgY29kaW5nLiBIb3dldmVyLCBJTyBwYWdlIGZhdWx0cyBtYXkgaGFwcGVu IHdoZW4gZG9pbmcgRE1BCj4gb3BlcmF0aW9ucy4gQXMgdGhlIGxhdGVuY3kgb2YgSU8gcGFnZSBm YXVsdCBpcyByZWxhdGl2ZWx5IGJpZywgRE1BCj4gcGVyZm9ybWFuY2Ugd2lsbCBiZSBhZmZlY3Rl ZCBzZXZlcmVseSB3aGVuIHRoZXJlIGFyZSBJTyBwYWdlIGZhdWx0cy4KPiBGcm9tIGEgbG9uZyB0 ZXJtIHZpZXcsIERNQSBwZXJmb3JtYW5jZSB3aWxsIGJlIG5vdCBzdGFibGUuCj4gCj4gSW4gaGln aC1wZXJmb3JtYW5jZSBJL08gY2FzZXMsIGFjY2VsZXJhdG9ycyBtaWdodCB3YW50IHRvIHBlcmZv cm0KPiBJL08gb24gYSBtZW1vcnkgd2l0aG91dCBJTyBwYWdlIGZhdWx0cyB3aGljaCBjYW4gcmVz dWx0IGluIGRyYW1hdGljYWxseQo+IGluY3JlYXNlZCBsYXRlbmN5LiBDdXJyZW50IG1lbW9yeSBy ZWxhdGVkIEFQSXMgY291bGQgbm90IGFjaGlldmUgdGhpcwo+IHJlcXVpcmVtZW50LCBlLmcuIG1s b2NrIGNhbiBvbmx5IGF2b2lkIG1lbW9yeSB0byBzd2FwIHRvIGJhY2t1cCBkZXZpY2UsCj4gcGFn ZSBtaWdyYXRpb24gY2FuIHN0aWxsIHRyaWdnZXIgSU8gcGFnZSBmYXVsdC4KPiAKPiBWYXJpb3Vz IGRyaXZlcnMgd29ya2luZyB1bmRlciB0cmFkaXRpb25hbCBub24tU1ZBIG1vZGUgYXJlIHVzaW5n Cj4gdGhlaXIgb3duIHNwZWNpZmljIGlvY3RsIHRvIGRvIHBpbi4gU3VjaCBpb2N0bCBjYW4gYmUg c2VlbiBpbiB2NGwyLAo+IGdwdSwgaW5maW5pYmFuZCwgbWVkaWEsIHZmaW8sIGV0Yy4gRHJpdmVy cyBhcmUgdXN1YWxseSBkb2luZyBkbWEKPiBtYXBwaW5nIHdoaWxlIGRvaW5nIHBpbi4KPiAKPiBC dXQsIGluIFNWQSBtb2RlLCBwaW4gY291bGQgYmUgYSBjb21tb24gbmVlZCB3aGljaCBpc24ndCBu ZWNlc3NhcmlseQo+IGJvdW5kIHdpdGggYW55IGRyaXZlcnMsIGFuZCBuZWl0aGVyIGlzIGRtYSBt YXBwaW5nIG5lZWRlZCBieSBkcml2ZXJzCj4gc2luY2UgZGV2aWNlcyBhcmUgdXNpbmcgdGhlIHZp cnR1YWwgYWRkcmVzcyBvZiBDUFUuIFRodXMsIEl0IGlzIGJldHRlcgo+IHRvIGludHJvZHVjZSBh IG5ldyBjb21tb24gc3lzY2FsbCBmb3IgaXQuCj4gCj4gVGhpcyBwYXRjaCBsZXZlcmFnZXMgdGhl IGRlc2lnbiBvZiB1c2VyZmF1bHRmZCBhbmQgYWRkcyBtZW1waW5mZCBmb3IgcGluCj4gdG8gYXZv aWQgbWVzc2luZyB1cCBtbV9zdHJ1Y3QuIEEgZmQgd2lsbCBiZSBnb3QgYnkgbWVtcGluZmQsIHRo ZW4gdXNlcgo+IHNwYWNlIGNhbiBkbyBwaW4vdW5waW4gcGFnZXMgYnkgaW9jdGxzIG9mIHRoaXMg ZmQsIGFsbCBwaW5uZWQgcGFnZXMgdW5kZXIKPiBvbmUgZmlsZSB3aWxsIGJlIHVucGlubmVkIGlu IGZpbGUgcmVsZWFzZSBwcm9jZXNzLiBMaWtlIHBpbiBwYWdlIGNhc2VzIGluCj4gb3RoZXIgcGxh Y2VzLCBjYW5fZG9fbWxvY2sgaXMgdXNlZCB0byBjaGVjayBwZXJtaXNzaW9uIGFuZCBpbnB1dAo+ IHBhcmFtZXRlcnMuCgoKQ2FuIHlvdSBkb2N1bWVudCB3aGF0IHRoZSBzeXNjYWxsIGRvZXM/CgpV c2VyZmF1bHRmZCBpcyBhbiBmZCBiZWNhdXNlIG9uZSBwcm9ncmFtIGNvbnRyb2xzIGFub3RoZXIu ICBJcyBtZW1waW5mZCBsaWtlIHRoaXM/Cl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fCmlvbW11IG1haWxpbmcgbGlzdAppb21tdUBsaXN0cy5saW51eC1mb3Vu ZGF0aW9uLm9yZwpodHRwczovL2xpc3RzLmxpbnV4Zm91bmRhdGlvbi5vcmcvbWFpbG1hbi9saXN0 aW5mby9pb21tdQ==