On 06/10/2011 05:38 AM, Igmar Palsenberg wrote:
> 
> On Jun 9, 2011, at 5:04 PM, John Reiser wrote:
> 
>>> ==1019== Warning: noted but unhandled ioctl 0xae03 with no size/direction 
>>> hints
>>> ==1019==    This could cause spurious value errors to appear.
>>> ==1019==    See README_MISSING_SYSCALL_OR_IOCTL for guidance on
>>> writing a proper wrapper.

>> The syscall is:
>>      ioctl(fd, 0xae03, ...)

Igmar Palsenberg <[email protected]> writes:
> I would bet my money on KVM_CHECK_EXTENSION. The KVM ioctl() from what I can 
> remember is two dozens of ioctl()'s, so if no one else volenteers, I'm 
> willing to supply a patch for this. That is, if Oleg can somehow confirm that 
> this really is KVM.

linux/include/linux/kvm.h has
-----
#define KVMIO 0xAE

#define KVM_CHECK_EXTENSION     _IO(KVMIO, 0x03)
-----
and in this particular case there are only two arguments used by the ioctl,
so the valgrind Warning is just a warning: the ioctl does not access user
address space.

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