From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([209.51.188.92]:46952) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gtCzH-0000JU-T4 for qemu-devel@nongnu.org; Mon, 11 Feb 2019 09:55:12 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gtCzF-0004E6-P5 for qemu-devel@nongnu.org; Mon, 11 Feb 2019 09:55:11 -0500 From: Andrey Shinkevich Date: Mon, 11 Feb 2019 14:54:55 +0000 Message-ID: <96affe90-df67-41d7-e681-7c370a8513e0@virtuozzo.com> References: <1548244464-633186-1-git-send-email-andrey.shinkevich@virtuozzo.com> <41e29129-196d-1b24-03ae-373b7d357725@virtuozzo.com> In-Reply-To: Content-Language: en-US Content-Type: text/plain; charset="utf-8" Content-ID: Content-Transfer-Encoding: base64 MIME-Version: 1.0 Subject: Re: [Qemu-devel] [Qemu-block] [PATCH RFC 1/1] Stream block job involves copy-on-read filter List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Alberto Garcia , "qemu-devel@nongnu.org" , "qemu-block@nongnu.org" Cc: "kwolf@redhat.com" , Vladimir Sementsov-Ogievskiy , "jcody@redhat.com" , "mreitz@redhat.com" , Denis Lunev DQoNCk9uIDExLzAyLzIwMTkgMTc6MDcsIEFsYmVydG8gR2FyY2lhIHdyb3RlOg0KPiBPbiBGcmkg MDggRmViIDIwMTkgMDQ6Mjk6NDggUE0gQ0VULCBBbmRyZXkgU2hpbmtldmljaCB3cm90ZToNCj4+ IE9uIDA4LzAyLzIwMTkgMTY6MTMsIEFsYmVydG8gR2FyY2lhIHdyb3RlOg0KPj4+IE9uIFdlZCAy MyBKYW4gMjAxOSAxMjo1NDoyNCBQTSBDRVQsIEFuZHJleSBTaGlua2V2aWNoIHdyb3RlOg0KPj4+ PiArc3RhdGljIEJsb2NrRHJpdmVyU3RhdGUgKmluc2VydF9maWx0ZXIoQmxvY2tEcml2ZXJTdGF0 ZSAqYnMsIEVycm9yICoqZXJycCkNCj4+Pj4gK3sNCj4+Pj4gKyAgICBCbG9ja0RyaXZlclN0YXRl ICpjb3JfZmlsdGVyX2JzOw0KPj4+PiArICAgIEVycm9yICpsb2NhbF9lcnIgPSBOVUxMOw0KPj4+ PiArDQo+Pj4+ICsgICAgY29yX2ZpbHRlcl9icyA9IGNyZWF0ZV9maWx0ZXJfbm9kZShicywgZXJy cCk7DQo+Pj4+ICsgICAgaWYgKGNvcl9maWx0ZXJfYnMgPT0gTlVMTCkgew0KPj4+PiArICAgICAg ICBlcnJvcl9wcmVwZW5kKGVycnAsICJDb3VsZCBub3QgY3JlYXRlIGZpbHRlciBub2RlOiAiKTsN Cj4+Pj4gKyAgICAgICAgcmV0dXJuIE5VTEw7DQo+Pj4+ICsgICAgfQ0KPj4+PiArDQo+Pj4+ICsg ICAgYmRydl9zZXRfYWlvX2NvbnRleHQoY29yX2ZpbHRlcl9icywgYmRydl9nZXRfYWlvX2NvbnRl eHQoYnMpKTsNCj4+Pj4gKw0KPj4+PiArICAgIGJkcnZfZHJhaW5lZF9iZWdpbihicyk7DQo+Pj4+ ICsgICAgYmRydl9yZXBsYWNlX25vZGUoYnMsIGNvcl9maWx0ZXJfYnMsICZsb2NhbF9lcnIpOw0K Pj4+PiArICAgIGJkcnZfZHJhaW5lZF9lbmQoYnMpOw0KPj4+DQo+Pj4gSSB0aGluayB0aGlzIHdh cyBhbHJlYWR5IGRpc2N1c3NlZCBpbiB0aGUgcHJldmlvdXMgdmVyc2lvbiBvZiB0aGlzDQo+Pj4g cGF0Y2g6IGlmIHlvdSBpbnNlcnQgYSBjb3B5LW9uLXJlYWQgZmlsdGVyIGhlcmUgdGhlbiBhbGwg Z3Vlc3QgcmVhZHMNCj4+PiB3aWxsIGNvcHkgdGhlIGRhdGEgZnJvbSB0aGUgYmFja2luZyBjaGFp biwgYnV0IHlvdSBkb24ndCB3YW50IHRvIGNvcHkNCj4+PiBhbnl0aGluZyBiZWxvdyB0aGUgJ2Jh c2UnIG5vZGUsIHNvIHRoZSBjb3B5LW9uLXJlYWQgZmlsdGVyIG5lZWRzIGENCj4+PiAnYmFzZScg cGFyYW1ldGVyLg0KPj4+DQo+PiBCZWZvcmUgdGhhdCwgd2Ugc3RpbGwgaGF2ZSB0aGUgdW5yZXNv bHZlZCBpc3N1ZSB3aXRoIGdldHRpbmcgdGhlDQo+PiBmaWx0ZXIgYXMgdGhlICdiYXNlJyBpbnB1 dCBwYXJhbWV0ZXIuIFRoYXQgaGFwcGVucyBzb21ldGltZXMgYmVjYXVzZQ0KPj4gdGhlIGJhc2Ug aXMgYmVpbmcgc2VhcmNoZWQgYnkgdGhlIGZpbGUgbmFtZSwgd2hpY2ggaXMgdGhlIHNhbWUgdG8g dGhlDQo+PiBvbmUgb2YgdGhlIGZpbHRlciwgcmF0aGVyIHRoYW4gYnkgdGhlIG5vZGUgbmFtZSAo ISkNCj4gDQo+IEknbSBub3Qgc3VyZSBpZiBJIHVuZGVyc3RhbmQuIGJsb2NrLXN0cmVhbSBoYXMg J2Jhc2UnIGFuZCAnYmFzZS1ub2RlJw0KPiBwYXJhbWV0ZXJzLCBhbmQgaW4gdGhlIGZpcnN0IGNh c2UgeW91IHdvdWxkIGNvbnZlcnQgdGhlIGZpbGUgbmFtZSB0byBhDQo+IG5vZGUgbmFtZS4NCj4g DQo+IHN0cmVhbV9zdGFydCgpIGdldHMgdGhlIEJsb2NrRHJpdmVyU3RhdGUsIG5vdCB0aGUgZmls ZSBuYW1lLCBzbyB3aHkNCj4gY2FuJ3QgeW91IGdldCB0aGUgbm9kZSBuYW1lIGZyb20gdGhlcmUg YW5kIHBhc3MgaXQgdG8gdGhlIGNvcHktb24tcmVhZA0KPiBmaWx0ZXI/DQo+IA0KPiBCZXJ0bw0K PiANCldoZW4gdGhlIGJsb2NrLXN0cmVhbSBRTVAgY29tbWFuZCBpcyBydW4gd2l0aCBhIGJhc2Ug ZmlsZSBwYXRoIG5hbWUsDQpxbXBfYmxvY2tfc3RyZWFtKCkgaW52b2tlcyBiZHJ2X2xvb2t1cF9i cygpIHRvIGdldCB0aGUNCkJsb2NrRHJpdmVyU3RhdGUgYnkgdGhlIGZpbGUgbmFtZSBhbmQgdG8g cGFzcyBpdCBmdXJ0aGVyIHRvDQpzdHJlYW1fc3RhcnQoKSwgd2hpbGUgaGFzX2Jhc2Vfbm9kZSA9 PSBmYWxzZS4NCkl0IHdvcmtzIHRoZSBzYW1lIHdheSBmb3IgdGhlIGNvcHktb24tcmVhZCBmaWx0 ZXIgaW5zZXJ0ZWQgYWJvdmUgdGhlDQpRQ09XMiBub2RlIGJlY2F1c2UgdGhleSBib3RoIGhhdmUg dGhlIHNhbWUgYW5kIG9ubHkgZmlsZSBwYXRoIG5hbWUuDQpTbywgdGhlIEJsb2NrRHJpdmVyU3Rh dGUgb2YgdGhlIGZpbHRlciBpcyBwYXNzZWQgdG8gdGhlDQpzdHJlYW1fc3RhcnQoKSBhcyB0aGUg cGFyYW1ldGVyIGluc3RlYWQgb2YgdGhlIG9uZSBvZiB0aGUgUUNPVzIgYmFzZQ0Kbm9kZS4gSSBl bWFpbGVkIHRoZSB3b3JrYXJvdW5kIHBhdGNoIHRoYXQgc2tpcHMgdGhlIGZpbHRlciBCUyBwYXNz ZWQNCnRvIHRoZSBzdHJlYW1fc3RhcnQoKSBhcyB0aGUgcGFyYW1ldGVyLCBpZiBhbnkuDQpUaGVy ZSBpcyBhbiBpZGVhIG9mIFZsYWRpbWlyIHRvIHBhc3MgYW4gaW50ZXJtZWRpYXRlIG5vZGUgdGhh dCBoYXMNCnRoZSBiYXNlIG5vZGUgYXMgaXRzIGJhY2tpbmcgb25lIGluc3RlYWQuIElmIHlvdSBj YW4gc3VnZ2VzdCBhbm90aGVyDQppZGVhLCBpdCB3aWxsIGJlIGFwcHJlY2lhdGVkLg0KDQotLSAN CldpdGggdGhlIGJlc3QgcmVnYXJkcywNCkFuZHJleSBTaGlua2V2aWNoDQo=