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SubjectRe: [uml-devel] [PATCH] UML - fix I/O hang when multiple devices are in use
Date
On giovedì 29 marzo 2007, Jeff Dike wrote:
> On Thu, Mar 29, 2007 at 02:36:43AM +0200, Blaisorblade wrote:
> > > Sometimes you need to. I'd probably just remove the do_ubd check and
> > > always recall the request function when handling completions, it's
> > > easier and safe.
>
> If I'm understanding this correctly, this is what happens now. There
> is still the flag check and return if the queue is being run, but I
> don't see the advantage of removing that.
Possibly he just didn't understood what do_ubd was for, maybe there's some
technical reason.

> That's a lot of mapping and unmapping though. I wonder if just
> calling mmap would cause the COWed page to be dropped...
Yes, it would.
--
Inform me of my mistakes, so I can add them to my list!
Paolo Giarrusso, aka Blaisorblade
http://www.user-mode-linux.org/~blaisorblade
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