On 30/03/2018 10:53, jiangyiwen wrote: > Currently, I found virtio-9p in VirtFS don't support "O_DIRECT + aio" > mode, both v9fs and qemu. So when user use "O_DIRECT + aio" mode and > increase iodepths, they can't get higher IOPS. > > I want to know why v9fs don't implement this mode? And I will try to > implement this mode from now on.
Can you explain? I think 9p has support for direct I/O in Linux. See v9fs_direct_IO in fs/9p/vfs_addr.c. Paolo
