From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48275) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f6zxj-0002uZ-Hy for qemu-devel@nongnu.org; Fri, 13 Apr 2018 10:46:04 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1f6zxg-0002dS-Fr for qemu-devel@nongnu.org; Fri, 13 Apr 2018 10:46:03 -0400 Received: from indium.canonical.com ([91.189.90.7]:46516) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1f6zxg-0002bw-9u for qemu-devel@nongnu.org; Fri, 13 Apr 2018 10:46:00 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1f6zxe-0002JR-KA for ; Fri, 13 Apr 2018 14:45:58 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id 976D42E80CF for ; Fri, 13 Apr 2018 14:45:58 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Fri, 13 Apr 2018 14:27:49 -0000 From: Thomas Huth <1126369@bugs.launchpad.net> Reply-To: Bug 1126369 <1126369@bugs.launchpad.net> Sender: bounces@canonical.com References: <20130215160748.9226.2053.malonedeb@gac.canonical.com> Message-Id: <152362966986.23464.7247155250850334343.malone@soybean.canonical.com> Errors-To: bounces@canonical.com Subject: [Qemu-devel] [Bug 1126369] Re: qemu-img snapshot -c is unreasonably slow List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Looking through old bug tickets... have this issue been fixed, i.e. could we close this ticket nowadays? Or is there still something left to do? ** Changed in: qemu Status: New =3D> Incomplete -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1126369 Title: qemu-img snapshot -c is unreasonably slow Status in QEMU: Incomplete Bug description: Something fishy is going on with qcow2 internal snapshot creation times. I don't know if this is a regression because I haven't used internal snapshots in the past. QEMU 1.4-rc2: $ qemu-img create -f qcow2 test.qcow2 -o size=3D50G,preallocation=3Dmetad= ata $ time qemu-img snapshot -c new test.qcow2 real 3m39.147s user 0m10.748s sys 0m26.165s (This is on an SSD) I expect snapshot creation to take under 1 second. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1126369/+subscriptions