Re: [fuse-devel] O_DIRECT with open() returns EINVAL

[Miklos S. <mi...@sz...>]

> I have an application which opens files with O_DIRECT.

Which app?

> the application fails
> on fuse based filesystems. While fuse based fs's can handle direct IO  mode
> if the FS returns the 'struct file_info' with ->direct_io = 1, why not use
> the same technique if O_DIRECT comes in file->f_flags (instead of just
> returning EINVAL)?

That's a possibility, but the O_DIRECT interface is generally
considered broken, due to badly interacting with the page cache, and
so I'm not entirely happy about having to support it.

Miklos