From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Wang Subject: Re: [PATCH net-next 0/3] vhost: accelerate metadata access through vmap() Date: Mon, 24 Dec 2018 16:44:14 +0800 Message-ID: References: <20181213101022.12475-1-jasowang@redhat.com> <20181213144116-mutt-send-email-mst@kernel.org> <836932fc-9266-b73d-2ee5-645f399e1a54@redhat.com> <20181215.114308.647436101869587689.davem@davemloft.net> <20181216144200-mutt-send-email-mst@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <20181216144200-mutt-send-email-mst@kernel.org> Content-Language: en-US List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org To: "Michael S. Tsirkin" , David Miller Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org List-Id: virtualization@lists.linuxfoundation.org Ck9uIDIwMTgvMTIvMTcg5LiK5Y2IMzo1NywgTWljaGFlbCBTLiBUc2lya2luIHdyb3RlOgo+IE9u IFNhdCwgRGVjIDE1LCAyMDE4IGF0IDExOjQzOjA4QU0gLTA4MDAsIERhdmlkIE1pbGxlciB3cm90 ZToKPj4gRnJvbTogSmFzb24gV2FuZyA8amFzb3dhbmdAcmVkaGF0LmNvbT4KPj4gRGF0ZTogRnJp LCAxNCBEZWMgMjAxOCAxMjoyOTo1NCArMDgwMAo+Pgo+Pj4gT24gMjAxOC8xMi8xNCDkuIrljYg0 OjEyLCBNaWNoYWVsIFMuIFRzaXJraW4gd3JvdGU6Cj4+Pj4gT24gVGh1LCBEZWMgMTMsIDIwMTgg YXQgMDY6MTA6MTlQTSArMDgwMCwgSmFzb24gV2FuZyB3cm90ZToKPj4+Pj4gSGk6Cj4+Pj4+Cj4+ Pj4+IFRoaXMgc2VyaWVzIHRyaWVzIHRvIGFjY2VzcyB2aXJ0cXVldWUgbWV0YWRhdGEgdGhyb3Vn aCBrZXJuZWwgdmlydHVhbAo+Pj4+PiBhZGRyZXNzIGluc3RlYWQgb2YgY29weV91c2VyKCkgZnJp ZW5kcyBzaW5jZSB0aGV5IGhhZCB0b28gbXVjaAo+Pj4+PiBvdmVyaGVhZHMgbGlrZSBjaGVja3Ms IHNwZWMgYmFycmllcnMgb3IgZXZlbiBoYXJkd2FyZSBmZWF0dXJlCj4+Pj4+IHRvZ2dsaW5nLgo+ Pj4+Pgo+Pj4+PiBUZXN0IHNob3dzIGFib3V0IDI0JSBpbXByb3ZlbWVudCBvbiBUWCBQUFMuIEl0 IHNob3VsZCBiZW5lZml0IG90aGVyCj4+Pj4+IGNhc2VzIGFzIHdlbGwuCj4+Pj4+Cj4+Pj4+IFBs ZWFzZSByZXZpZXcKPj4+PiBJIHRoaW5rIHRoZSBpZGVhIG9mIHNwZWVkaW5nIHVwIHVzZXJzcGFj ZSBhY2Nlc3MgaXMgYSBnb29kIG9uZS4KPj4+PiBIb3dldmVyIEkgdGhpbmsgdGhhdCBtb3Zpbmcg YWxsIGNoZWNrcyB0byBzdGFydCBpcyB3YXkgdG9vIGFnZ3Jlc3NpdmUuCj4+Pgo+Pj4gU28gZGlk IHBhY2tldCBhbmQgQUZfWERQLiBBbnl3YXksIHNoYXJpbmcgYWRkcmVzcyBzcGFjZSBhbmQgYWNj ZXNzCj4+PiB0aGVtIGRpcmVjdGx5IGlzIHRoZSBmYXN0ZXN0IHdheS4gUGVyZm9ybWFuY2UgaXMg dGhlIG1ham9yCj4+PiBjb25zaWRlcmF0aW9uIGZvciBwZW9wbGUgdG8gY2hvb3NlIGJhY2tlbmQu IENvbXBhcmUgdG8gdXNlcnNwYWNlCj4+PiBpbXBsZW1lbnRhdGlvbiwgdmhvc3QgZG9lcyBub3Qg aGF2ZSBzZWN1cml0eSBhZHZhbnRhZ2VzIGF0IGFueQo+Pj4gbGV2ZWwuIElmIHZob3N0IGlzIHN0 aWxsIHNsb3csIHBlb3BsZSB3aWxsIHN0YXJ0IHRvIGRldmVsb3AgYmFja2VuZHMKPj4+IGJhc2Vk IG9uIGUuZyBBRl9YRFAuCj4+IEV4YWN0bHksIHRoaXMgaXMgcHJlY2lzZWx5IGhvdyB0aGlzIGtp bmQgb2YgcHJvYmxlbSBzaG91bGQgYmUgc29sdmVkLgo+Pgo+PiBNaWNoYWVsLCBJIHN0cm9uZ2x5 IHN1cHBvcnQgdGhlIGFwcHJvYWNoIEphc29uIGlzIHRha2luZyBoZXJlLCBhbmQgSQo+PiB3b3Vs ZCBsaWtlIHRvIGFzayB5b3UgdG8gc2VyaW91c2x5IHJlY29uc2lkZXIgeW91ciBvYmplY3Rpb25z Lgo+Pgo+PiBUaGFuayB5b3UuCj4gT2theS4gV29uJ3QgYmUgdGhlIGZpcnN0IHRpbWUgSSdtIHdy b25nLgo+Cj4gTGV0J3Mgc2F5IHdlIGlnbm9yZSBzZWN1cml0eSBhc3BlY3RzLCBidXQgd2UgbmVl ZCB0byBtYWtlIHN1cmUgdGhlCj4gZm9sbG93aW5nIGFsbCBrZWVwIHdvcmtpbmcgKGJyb2tlbiB3 aXRoIHRoaXMgcmV2aXNpb24pOgo+IC0gZmlsZSBiYWNrZWQgbWVtb3J5IChJIGRpZG4ndCBzZWUg d2hlcmUgd2UgbWFyayBtZW1vcnkgZGlydHkgLQo+ICAgIGlmIHdlIGRvbid0IHdlIGdldCBndWVz dCBtZW1vcnkgY29ycnVwdGlvbiBvbiBjbG9zZSwgaWYgd2UgZG8KPiAgICB0aGVuIGhvc3QgY3Jh c2ggYXMgaHR0cHM6Ly9sd24ubmV0L0FydGljbGVzLzc3NDQxMS8gc2VlbXMgdG8gYXBwbHkgaGVy ZT8pCgoKV2Ugb25seSBwaW4gbWV0YWRhdGEgcGFnZXMsIHNvIEkgZG9uJ3QgdGhpbmsgdGhleSBj YW4gYmUgdXNlZCBmb3IgRE1BLiAKU28gaXQgd2FzIHByb2JhYmx5IG5vdCBhbiBpc3N1ZS4gVGhl IHJlYWwgaXNzdWUgaXMgemVyb2NvcHkgY29kZXMsIG1heWJlIAppdCdzIHRpbWUgdG8gZGlzYWJs ZSBpdCBieSBkZWZhdWx0PwoKCj4gLSBUSFAKCgpXZSB3aWxsIG1pc3MgMiBvciA0IHBhZ2VzIGZv ciBUSFAsIEkgd29uZGVyIHdoZXRoZXIgb3Igbm90IGl0J3MgbWVhc3VyYWJsZS4KCgo+IC0gYXV0 by1OVU1BCgoKSSdtIG5vdCBzdXJlIGF1dG8tTlVNQSB3aWxsIGhlbHAgZm9yIHRoZSBjYXNlIG9m IElQQy4gSXQgY2FuIGRhbWFnZSB0aGUgCnBlcmZvcm1hbmNlIGluIHRoZSB3b3JzdCBjYXNlIGlm IHZob3N0IGFuZCB1c2Vyc3BhY2UgYXJlIHJ1bm5pbmcgaW4gdHdvIApkaWZmZXJlbnQgbm9kZXMu IEFueXdheSBJIGNhbiBtZWFzdXJlLgoKCj4KPiBCZWNhdXNlIHZob3N0IGlzbid0IGxpa2UgQUZf WERQIHdoZXJlIHlvdSBjYW4ganVzdCB0ZWxsIHBlb3BsZSAidXNlCj4gaHVnZXRsYmZzIiBhbmQg ImRhdGEgaXMgcmVtb3ZlZCBvbiBjbG9zZSIgLSBwZW9wbGUgYXJlIHVzaW5nIGl0IGluIGxvdHMK PiBvZiBjb25maWd1cmF0aW9ucyB3aXRoIGd1ZXN0IG1lbW9yeSBzaGFyZWQgYmV0d2VlbiByaW5n cyBhbmQgdW5yZWxhdGVkCj4gZGF0YS4KCgpUaGlzIHNlcmllcyBkb2Vzbid0IHNoYXJlIGRhdGEs IG9ubHkgbWV0YWRhdGEgaXMgc2hhcmVkLgoKCj4KPiBKYXNvbiwgdGhvdWdodHMgb24gdGhlc2U/ Cj4KCkJhc2VkIG9uIHRoZSBhYm92ZSwgSSBjYW4gbWVhc3VyZSB0aGUgaW1wYWN0IG9mIFRIUCB0 byBzZWUgaG93IGl0IGltcGFjdHMuCgpGb3IgdW5zYWZlIHZhcmlhbnRzLCBpdCBjYW4gb25seSB3 b3JrIGZvciB3aGVuIHdlIGNhbiBiYXRjaCB0aGUgYWNjZXNzIAphbmQgaXQgbmVlZHMgbm9uIHRy aXZpYWwgcmV3b3JrIG9uIHRoZSB2aG9zdCBjb2RlcyB3aXRoIHVuZXhwZWN0ZWQgCmFtb3VudCBv ZiB3b3JrIGZvciBhcmNocyBvdGhlciB0aGFuIHg4Ni4gSSdtIG5vdCBzdXJlIGl0J3Mgd29ydGgg dG8gdHJ5LgoKVGhhbmtzCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fXwpWaXJ0dWFsaXphdGlvbiBtYWlsaW5nIGxpc3QKVmlydHVhbGl6YXRpb25AbGlzdHMu bGludXgtZm91bmRhdGlvbi5vcmcKaHR0cHM6Ly9saXN0cy5saW51eGZvdW5kYXRpb24ub3JnL21h aWxtYW4vbGlzdGluZm8vdmlydHVhbGl6YXRpb24=