tree 18d8041935c716ea293399136f769dafdbd8614d
parent 3cbbe9fd1feaf3264f745fccb0bf5f62c583078f
author Paolo Bonzini <pbonzini@redhat.com> 1404899581 +0200
committer Stefan Hajnoczi <stefanha@redhat.com> 1409305618 +0100

AioContext: take bottom halves into account when computing aio_poll timeout

Right now, QEMU invokes aio_bh_poll before the "poll" phase
of aio_poll.  It is simpler to do it afterwards and skip the
"poll" phase altogether when the OS-dependent parts of AioContext
are invoked from GSource.  This way, AioContext behaves more
similarly when used as a GSource vs. when used as stand-alone.

As a start, take bottom halves into account when computing the
poll timeout.  If a bottom half is ready, do a non-blocking
poll.  As a side effect, this makes idle bottom halves work
with aio_poll; an improvement, but not really an important
one since they are deprecated.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>