我想创建 KVM 机器的克隆 - 昨天我能够在几分钟内创建同一台机器的克隆。现在却花了几个小时，而且仍然卡在“0%”：
create full clone of drive ide0 (local:100/vm-100-disk-1.raw)
Formatting '/var/lib/vz/images/111/vm-111-disk-1.raw', fmt=raw size=536870912000
transferred: 0 bytes remaining: 536870912000 bytes total: 536870912000 bytes progression: 0.00 %
我不知道为什么会这样。任务正在运行（几分钟前我重新启动了它）-http://d.pr/tJn4
知道又出了什么问题吗？
编辑：磁盘 I/O 较低，因为任务没有将任何数据写入硬盘（http://d.pr/1furj）。
如果我跟踪概述中给出的进程 ID，我会得到以下结果：
select(24, [16 19], NULL, NULL, {0, 553078}) = 0 (Timeout)
select(24, [16 19], NULL, NULL, {1, 0}) = 0 (Timeout)
select(24, [16 19], NULL, NULL, {1, 0}) = 0 (Timeout)
select(24, [16 19], NULL, NULL, {1, 0}) = 0 (Timeout)
select(24, [16 19], NULL, NULL, {1, 0}) = 0 (Timeout)
select(24, [16 19], NULL, NULL, {1, 0}) = 0 (Timeout)
select(24, [16 19], NULL, NULL, {1, 0}) = 0 (Timeout)
select(24, [16 19], NULL, NULL, {1, 0}) = 0 (Timeout)
select(24, [16 19], NULL, NULL, {1, 0}) = 0 (Timeout)
select(24, [16 19], NULL, NULL, {1, 0}) = 0 (Timeout)
select(24, [16 19], NULL, NULL, {1, 0}) = 0 (Timeout)
select(24, [16 19], NULL, NULL, {1, 0}) = 0 (Timeout)
select(24, [16 19], NULL, NULL, {1, 0}) = 0 (Timeout)
select(24, [16 19], NULL, NULL, {1, 0}) = 0 (Timeout)
select(24, [16 19], NULL, NULL, {1, 0}) = 0 (Timeout)
如果我跟踪进程 233113（实际上正在运行），我会得到以下结果：
lseek(7, 49650073600, SEEK_DATA) = 49650073600
lseek(7, 49650073600, SEEK_HOLE) = 49650077696
lseek(7, 49650077696, SEEK_DATA) = 51797557248
lseek(7, 51797557248, SEEK_DATA) = 51797557248
lseek(7, 51797557248, SEEK_HOLE) = 51797565440
lseek(7, 51797565440, SEEK_DATA) = 51797622784
lseek(7, 51797622784, SEEK_DATA) = 51797622784
lseek(7, 51797622784, SEEK_HOLE) = 51797630976
lseek(7, 51797630976, SEEK_DATA) = 51797688320
lseek(7, 51797688320, SEEK_DATA) = 51797688320
lseek(7, 51797688320, SEEK_HOLE) = 51801108480
lseek(7, 51801108480, SEEK_DATA) = 51831242752
lseek(7, 51831242752, SEEK_DATA) = 51831242752
lseek(7, 51831242752, SEEK_HOLE) = 51833991168
lseek(7, 51833991168, SEEK_DATA) = 51931774976
lseek(7, 51931774976, SEEK_DATA) = 51931774976
lseek(7, 51931774976, SEEK_HOLE) = 51962368000
lseek(7, 51962368000, SEEK_DATA) = 51962380288
lseek(7, 51962380288, SEEK_DATA) = 51962380288
lseek(7, 51962380288, SEEK_HOLE) = 51963707392
lseek(7, 51963707392, SEEK_DATA) = 51963756544
lseek(7, 51963756544, SEEK_DATA) = 51963756544
lseek(7, 51963756544, SEEK_HOLE) = 51963973632
lseek(7, 51963973632, SEEK_DATA) = 53945040896
lseek(7, 53945040896, SEEK_DATA) = 53945040896
lseek(7, 53945040896, SEEK_HOLE) = 53945049088
lseek(7, 53945049088, SEEK_DATA) = 53945106432
lseek(7, 53945106432, SEEK_DATA) = 53945106432
lseek(7, 53945106432, SEEK_HOLE) = 53945110528
lseek(7, 53945110528, SEEK_DATA) = 53945171968
lseek(7, 53945171968, SEEK_DATA) = 53945171968
lseek(7, 53945171968, SEEK_HOLE) = 53947260928
lseek(7, 53947260928, SEEK_DATA) = 53978726400
lseek(7, 53978726400, SEEK_DATA) = 53978726400
lseek(7, 53978726400, SEEK_HOLE) = 53981294592
lseek(7, 53981294592, SEEK_DATA) = 54079258624
lseek(7, 54079258624, SEEK_DATA) = 54079258624
lseek(7, 54079258624, SEEK_HOLE) = 54096543744
lseek(7, 54096543744, SEEK_DATA) = 54096560128
lseek(7, 54096560128, SEEK_DATA) = 54096560128
lseek(7, 54096560128, SEEK_HOLE) = 54096625664
lseek(7, 54096625664, SEEK_DATA) = 56092524544
lseek(7, 56092524544, SEEK_DATA) = 56092524544
lseek(7, 56092524544, SEEK_HOLE) = 56092532736
lseek(7, 56092532736, SEEK_DATA) = 56092590080
lseek(7, 56092590080, SEEK_DATA) = 56092590080
lseek(7, 56092590080, SEEK_HOLE) = 56092594176
lseek(7, 56092594176, SEEK_DATA) = 56092655616
lseek(7, 56092655616, SEEK_DATA) = 56092655616
lseek(7, 56092655616, SEEK_HOLE) = 56094593024
lseek(7, 56094593024, SEEK_DATA) = 56126210048
lseek(7, 56126210048, SEEK_DATA) = 56126210048
lseek(7, 56126210048, SEEK_HOLE) = 56128737280
lseek(7, 56128737280, SEEK_DATA) = 56226742272
lseek(7, 56226742272, SEEK_DATA) = 56226742272
lseek(7, 56226742272, SEEK_HOLE) = 56250884096
lseek(7, 56250884096, SEEK_DATA) = 58240008192
lseek(7, 58240008192, SEEK_DATA) = 58240008192
lseek(7, 58240008192, SEEK_HOLE) = 58240016384
lseek(7, 58240016384, SEEK_DATA) = 58240073728
lseek(7, 58240073728, SEEK_DATA) = 58240073728
lseek(7, 58240073728, SEEK_HOLE) = 58240077824
lseek(7, 58240077824, SEEK_DATA) = 58240139264
lseek(7, 58240139264, SEEK_DATA) = 58240139264
lseek(7, 58240139264, SEEK_HOLE) = 58241294336
VM 的大小为500GB并且机器上有足够的空间：
udev 10M 0 10M 0% /dev
tmpfs 26G 319M 25G 2% /run
/dev/sda4 3,6T 878G 2,6T 26% /
tmpfs 63G 43M 63G 1% /dev/shm
tmpfs 5,0M 0 5,0M 0% /run/lock
tmpfs 63G 0 63G 0% /sys/fs/cgroup
/dev/sda3 946M 188M 694M 22% /boot
cgmfs 100K 0 100K 0% /run/cgmanager/fs
/dev/fuse 30M 28K 30M 1% /etc/pve
tmpfs 100K 0 100K 0% /run/lxcfs/controllers
tmpfs 13G 0 13G 0% /run/user/1000
这是一个没有集群的单一 proxmox 安装。
我正在运行以下 proxmox 系统：
proxmox-ve: 4.1-28 (running kernel: 4.2.6-1-pve)
pve-manager: 4.1-2 (running version: 4.1-2/78c5f4a2)
pve-kernel-4.2.6-1-pve: 4.2.6-28
pve-kernel-2.6.32-43-pve: 2.6.32-166
pve-kernel-4.2.2-1-pve: 4.2.2-16
pve-kernel-2.6.32-26-pve: 2.6.32-114
pve-kernel-4.2.3-2-pve: 4.2.3-22
lvm2: 2.02.116-pve2
corosync-pve: 2.3.5-2
libqb0: 0.17.2-1
pve-cluster: 4.0-29
qemu-server: 4.0-42
pve-firmware: 1.1-7
libpve-common-perl: 4.0-42
libpve-access-control: 4.0-10
libpve-storage-perl: 4.0-38
pve-libspice-server1: 0.12.5-2
vncterm: 1.2-1
pve-qemu-kvm: 2.4-18
pve-container: 1.0-35
pve-firewall: 2.0-14
pve-ha-manager: 1.0-16
ksm-control-daemon: 1.2-1
glusterfs-client: 3.5.2-2+deb8u1
lxc-pve: 1.1.5-5
lxcfs: 0.13-pve2
cgmanager: 0.39-pve1
criu: 1.6.0-1
系统日志显示：
Dec 29 19:03:49 hostname pvedaemon[26539]: <root@pam> starting task UPID:hostname:0000681B:0329CBE4:5682CB05:qmclone:100:root@pam:
Dec 29 19:04:59 hostname pveproxy[19936]: worker exit
Dec 29 19:04:59 hostname pveproxy[24482]: worker 19936 finished
Dec 29 19:04:59 hostname pveproxy[24482]: starting 1 worker(s)
Dec 29 19:04:59 hostname pveproxy[24482]: worker 27331 started
Dec 29 19:05:02 hostname lxcfs[18709]: select: No such file or directory
Dec 29 19:05:12 hostname pvedaemon[26539]: <root@pam> successful auth for user 'root@pam'
Dec 29 19:06:51 hostname lxcfs[18709]: select: Success
Dec 29 19:07:55 hostname kernel: [530914.403182] audit: type=1400 audit(1451412475.136:1387): apparmor="DENIED" operation="ptrace" profile="lxc-container-default" pid=1994 comm="sw-collectd" requested_mask="trace" denied_mask="trace" peer="unconfined"
Dec 29 19:07:55 hostname kernel: [530914.403204] audit: type=1400 audit(1451412475.136:1388): apparmor="DENIED" operation="ptrace" profile="lxc-container-default" pid=1994 comm="sw-collectd" requested_mask="read" denied_mask="read" peer="unconfined"
Dec 29 19:09:25 hostname pvedaemon[26539]: <root@pam> successful auth for user 'root@pam'
Dec 29 19:09:42 hostname pveproxy[24482]: worker 27331 finished
Dec 29 19:09:42 hostname pveproxy[24482]: starting 1 worker(s)
Dec 29 19:09:42 hostname pveproxy[24482]: worker 29677 started
Dec 29 19:09:44 hostname pveproxy[29676]: got inotify poll request in wrong process - disabling inotify
Dec 29 19:09:46 hostname pveproxy[29676]: worker exit
Dec 29 19:10:02 hostname lxcfs[18709]: select: Success
Dec 29 19:10:32 hostname pvedaemon[25727]: worker exit
Dec 29 19:10:32 hostname pvedaemon[1160]: worker 25727 finished
Dec 29 19:10:32 hostname pvedaemon[1160]: starting 1 worker(s)
Dec 29 19:10:32 hostname pvedaemon[1160]: worker 30242 started
Dec 29 19:11:45 hostname lxcfs[18709]: select: Success
Dec 29 19:11:48 hostname pvedaemon[30242]: <root@pam> successful auth for user 'root@pam'
Dec 29 19:13:48 hostname pvedaemon[26539]: worker exit
Dec 29 19:13:48 hostname pvedaemon[1160]: worker 26539 finished
Dec 29 19:13:48 hostname pvedaemon[1160]: starting 1 worker(s)
Dec 29 19:13:48 hostname pvedaemon[1160]: worker 31618 started
Dec 29 19:13:55 hostname pveproxy[29677]: worker exit
Dec 29 19:13:55 hostname pveproxy[24482]: worker 29677 finished
Dec 29 19:13:55 hostname pveproxy[24482]: starting 1 worker(s)
Dec 29 19:13:55 hostname pveproxy[24482]: worker 31677 started
Dec 29 19:14:28 hostname pveproxy[24482]: worker 26350 finished
Dec 29 19:14:28 hostname pveproxy[24482]: starting 1 worker(s)
Dec 29 19:14:28 hostname pveproxy[24482]: worker 31867 started
Dec 29 19:14:31 hostname pveproxy[31866]: worker exit
Dec 29 19:15:02 hostname lxcfs[18709]: select: Success
Dec 29 19:15:40 hostname pvedaemon[23612]: worker exit
Dec 29 19:15:40 hostname pvedaemon[1160]: worker 23612 finished
Dec 29 19:15:40 hostname pvedaemon[1160]: starting 1 worker(s)
Dec 29 19:15:40 hostname pvedaemon[1160]: worker 32588 started