Re: [Qemu-devel] migration: adding migration to/from a file (v2)

[Jamie Lokier <jamie@shareable.org>]

Uri Lublin wrote:
> Your concern in the previous patch was that write() to a regular file might 
> block. That's why I'm calling select before calling write. Do you think 
> select will mark the fd as writeable but write would still block ?

select() on a regular file _always_ marks the fd as writable.  That's
one of the rules of select().  For non-blocking file access you can
only use threads or AIO, or a helper process.

-- Jamie