Anthony Liguori wrote:
> Avi Kivity wrote:
>> Anthony Liguori wrote:
>>
>>> I think it's just a matter of calling do_mmap() with the appropriate
>>> parameters. It looks likes there's some drivers call do_mmap()
>>> directly.
>>>
>>>
>>
>> This will halve the maximum size of virtual machines on i386 since
>> userspace will also mmap() the memory, and the virtual address space is
>> restricted to 3GB.
>>
>
> I wonder if there is a way to force the mmap() to return the userspace
> address we previously allocated.
>
Yes:
>
> unsigned long
> get_unmapped_area(struct file *file, unsigned long addr, unsigned long
> len,
> unsigned long pgoff, unsigned long flags)
> {
> unsigned long (*get_area)(struct file *, unsigned long,
> unsigned long, unsigned long,
> unsigned long);
>
> get_area = current->mm->get_unmapped_area;
> if (file && file->f_op && file->f_op->get_unmapped_area)
> get_area = file->f_op->get_unmapped_area;
> addr = get_area(file, addr, len, pgoff, flags);
--
error compiling committee.c: too many arguments to function
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