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

[Avi K. <av...@qu...>]

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.