Linux loop device problem

gistfile1.txt

# mount -t iso9660 -o loop,ro,noexec ~temoto/Downloads/archlinux-2012.06-1-archboot-x86_64.iso /tmp/arch/
mount: /tmp/arch/: mount failed: No such file or directory


$ ls -l ~/Downloads/archlinux-2012.06-1-archboot-x86_64.iso 
-rw-r--r-- 1 temoto users 375390208 Aug 20 00:39 /home/temoto/Downloads/archlinux-2012.06-1-archboot-x86_64.iso


$ ls -ld /tmp/arch
drwxr-xr-x 2 root root 4096 Aug 20 01:10 /tmp/arch


$ ls -l /dev/loop-control 
crw------- 1 root root 10, 237 Jul 24 20:02 /dev/loop-control


$ sudo strace losetup --find --show ~/Downloads/archlinux-2012.06-1-archboot-x86_64.iso 
execve("/sbin/losetup", ["losetup", "--find", "--show", "/home/temoto/Downloads/archlinux"...], [/* 17 vars */]) = 0
brk(0)                                  = 0x1485000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2a88e99000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=159114, ...}) = 0
mmap(NULL, 159114, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f2a88e72000
close(3)                                = 0
open("/lib/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0000\30\2\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1997041, ...}) = 0
mmap(NULL, 3816528, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f2a888d5000
mprotect(0x7f2a88a70000, 2093056, PROT_NONE) = 0
mmap(0x7f2a88c6f000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x19a000) = 0x7f2a88c6f000
mmap(0x7f2a88c75000, 15440, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f2a88c75000
close(3)                                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2a88e71000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2a88e70000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2a88e6f000
arch_prctl(ARCH_SET_FS, 0x7f2a88e70700) = 0
mprotect(0x7f2a88c6f000, 16384, PROT_READ) = 0
mprotect(0x609000, 4096, PROT_READ)     = 0
mprotect(0x7f2a88e9a000, 4096, PROT_READ) = 0
munmap(0x7f2a88e72000, 159114)          = 0
brk(0)                                  = 0x1485000
brk(0x14a6000)                          = 0x14a6000
open("/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=1607632, ...}) = 0
mmap(NULL, 1607632, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f2a88ce6000
close(3)                                = 0
uname({sys="Linux", node="temoto-mobi", ...}) = 0
stat("/dev/loop-control", {st_mode=S_IFCHR|0600, st_rdev=makedev(10, 237), ...}) = 0
open("/dev/loop-control", O_RDWR)       = -1 ENODEV (No such device)
stat("/dev/loop", 0x7ffff2d87e40)       = -1 ENOENT (No such file or directory)
stat("/dev/loop0", 0x7ffff2d84d00)      = -1 ENOENT (No such file or directory)
open("/sys/block/loop0/dev", O_RDONLY)  = -1 ENOENT (No such file or directory)
readlink("/home", 0x7ffff2d85eb0, 4096) = -1 EINVAL (Invalid argument)
readlink("/home/temoto", 0x7ffff2d85eb0, 4096) = -1 EINVAL (Invalid argument)
readlink("/home/temoto/Downloads", 0x7ffff2d85eb0, 4096) = -1 EINVAL (Invalid argument)
readlink("/home/temoto/Downloads/archlinux-2012.06-1-archboot-x86_64.iso", 0x7ffff2d85eb0, 4096) = -1 EINVAL (Invalid argument)
open("/home/temoto/Downloads/archlinux-2012.06-1-archboot-x86_64.iso", O_RDWR) = 3
open("/dev/loop0", O_RDWR)              = -1 ENOENT (No such file or directory)
close(3)                                = 0
open("/usr/share/locale/locale.alias", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=2502, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2a88e98000
read(3, "# Locale name alias data base.\n#"..., 4096) = 2502
read(3, "", 4096)                       = 0
close(3)                                = 0
munmap(0x7f2a88e98000, 4096)            = 0
open("/usr/share/locale/en_US.UTF-8/LC_MESSAGES/util-linux.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en_US.utf8/LC_MESSAGES/util-linux.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en_US/LC_MESSAGES/util-linux.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en.UTF-8/LC_MESSAGES/util-linux.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en.utf8/LC_MESSAGES/util-linux.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en/LC_MESSAGES/util-linux.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
write(2, "losetup: ", 9losetup: )                = 9
write(2, "failed to setup loop device", 27failed to setup loop device) = 27
write(2, ": ", 2: )                       = 2
open("/usr/share/locale/en_US.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en_US.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en_US/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/share/locale/en/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
write(2, "No such file or directory\n", 26No such file or directory
) = 26
exit_group(1)                           = ?
+++ exited with 1 +++