Re: [patch 2/2] QEMU: decrease console "refresh rate" with -nographic

Avi Kivity
2008-04-15T05:39:26Z

Anthony Liguori wrote:
>
> BTW, when we set O_ASYNC on the tap fd, we're eliminating O_NONBLOCK.
> This means that we have to poll loop select() when readv()'ing packets
> instead of just reading until hitting AGAIN. This means at least an
> extra syscall per packet.

I didn't know that O_ASYNC and O_NONBLOCK were mutually exclusive. Can
you point me at the relevant documentation?

--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.