From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33424) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fizi4-0000X3-W3 for qemu-devel@nongnu.org; Fri, 27 Jul 2018 06:10:57 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fizi1-0005Q3-Oj for qemu-devel@nongnu.org; Fri, 27 Jul 2018 06:10:56 -0400 Received: from mxhk.zte.com.cn ([63.217.80.70]:51946) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fizi1-0005Go-At for qemu-devel@nongnu.org; Fri, 27 Jul 2018 06:10:53 -0400 Received: from mse01.zte.com.cn (unknown [10.30.3.20]) by Forcepoint Email with ESMTPS id BF38E43F9DCF718A2510 for ; Fri, 27 Jul 2018 18:10:44 +0800 (CST) Received: from kjyxapp05.zte.com.cn ([10.30.12.204]) by mse01.zte.com.cn with SMTP id w6RAACqC061003 for ; Fri, 27 Jul 2018 18:10:12 +0800 (GMT-8) (envelope-from yang.bin18@zte.com.cn) Date: Fri, 27 Jul 2018 18:10:14 +0800 (CST) Message-ID: <201807271810146495949@zte.com.cn> Mime-Version: 1.0 From: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: base64 Subject: [Qemu-devel] =?utf-8?q?qcow2_performance_improve_=5Bdiscuss=5D?= List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org V2hlbiB1c2UgY2x1c3Rlcl9zaXplPTFNIHFjb3cyIG5ld2x5IGNyZWF0ZWQgdG8gdGVzdCAiMzJr IHJhbmQgd3JpdGUiIGluIHRoZSBWTSxXZSBnZXQgbG93IHBlcmZvcm1hbmNlIHdpdGhpbiBWTeOA gkJ1dCB0aGVyZSBhcmUgaHVnZSDigJx3cml0ZeKAnSByZXF1ZXN0cyBpbiBIT1NUIHdoaWNoIGZh bGxzIGludG8gcWVtdSAgIHN0YWNrIG9mInBlcmZvcm1fY293Ii4NCg0KDQogICAgICAgICBXZSBm b3VuZCB0aHJlZSBzY2VuZSB0byB1c2UgY293Lg0KDQogICAgICAgICAgICAgICAgMS4gIHdyaXRl IGNsdXN0ZXIgaGF2ZSBzbmFwc2hvdCANCg0KICAgICAgICAgICAgICAgIDIuICB3cml0ZSBpbWcg aGFzIGJhY2tpbmcgZmlsZSANCg0KICAgICAgICAgICAgICAgIDMuICB0d28gY29uY3VycmVudCB3 cml0ZXMgaGFwcGVuIHRvIHRoZSBzYW1lIHVuYWxsb2NhdGVkIGNsdXN0ZXIuRWFjaCB3cml0ZSBh bGxvY2F0ZXMgc2VwYXJhdGUgY2x1c3RlciBhbmQgd3JpdGVzIGRhdGEgY29uY3VycmVudGx5IOOA gg0KDQogICAgICAgICAgICAgICAgRm9yIHNjZW5lIDIgYW5kIDPvvIx3ZSB3YW50IHRvIGNoZWNr IHRoZSBuZWNlc3NpdHkgYmVmb3JlIGNvdy4NCg0KICAgICAgICAgICAgICAgIEZvciBzY2VuZSAy ICx0byBjaGVjayBicy0+YmFja2luZyxpZiBmYWxzZSAsbm90IGNvdyAuIA0KDQogICAgICAgICAg ICAgICAgRm9yIHNjZW5lIDMsaWYgbm90IGNvbmN1cnJlbnQgd3JpdGVzIGhhcHBlbiB0byB0aGUg c2FtZSB1bmFsbG9jYXRlZCBjbHVzdGVyLG5vdCBjb3cu