17 May
2015
17 May
'15
9:13 p.m.
On Wed May 13, 2015 at 14:24:35 +0800, yang.wei9@zte.com.cn wrote:
I create a file on tmpfs, and it read/write works fine. However, it cannot mmap, and returns EINVAL. I found the reason is that dataspace of the file is not valid.
L4::Cap<L4Re::Dataspace> fds = fi->data_space() if (!fds.is_valid()) { return -EINVAL; }How to make it valid? Is there another method to do file mapping?
tmpfs does not currently implement mmap, that's why it does not work. To make it work we'd need use memory more wasteful inside tmpfs than currently. Maybe it's worth it.
Adam
--
Adam adam@os.inf.tu-dresden.de
Lackorzynski http://os.inf.tu-dresden.de/~adam/