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Re: Perform mmap and poll on PUD character devices

On Sun, Sep 11, 2011 at 08:58:53PM +0200, Roger Pau Monné wrote:
> > I can't see how a userland implementation can have better performances
> > than an all in-kernel implementation. There are more context switches,
> > which are notr so cheap with Xen.
> >From what I understand using blktap with Xen provides better
> performance because it is designed specifically for this task (attach
> disks to virtual machines), and uses asynchronous I/O, not because

our block backend is also asynchronous

Manuel Bouyer <>
     NetBSD: 26 ans d'experience feront toujours la difference

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