Hi,
running even a simple "qemu-img create -f qcow2 some.img 1G" causes
the following in dmesg on a Linux host with linux-2.6.39.1 x86_64 kernel
and 32bit userspace:
ioctl32(qemu-img:5296): Unknown cmd fd(3) cmd(00005326){t:'S';sz:0}
arg(7fffffff) on some.img
ioctl32(qemu-img:5296): Unknown cmd fd(3) cmd(801c0204){t:02;sz:28}
arg(fff77350) on some.img
(The same happens when starting a qemu or kvm vm.)
ioctl 00005326 seems to be CDROM_DRIVE_STATUS,
ioctl 801c0204 is FDGETPRM. Both are used in
qemu/block/raw-posix.c in cdrom_probe_device()
and floppy_probe_device() respectively.
FWIW, I'm using qemu/kvm from Debian unstable
(qemu-0.14.0+dfsg-5.1, qemu-kvm-0.14.1+dfsg-1)
Johannes
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