Re: [PATCH 1/3] qemu: Move memory limit computation to a reusable function

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On Tue, Jul 02, 2013 at 12:34:44 +0200, Paolo Bonzini wrote:
> Il 02/07/2013 08:34, Jiri Denemark ha scritto:
> > I'm not sure if that's
> > the right think to do or not but it's certainly better than before when
> > memory locking limit completely ignore the need for VRAM and per-disk
> > cache. Unfortunately, the original formula was suggested by Avi, who
> > moved to new challenges. Perhaps others could jump in and share their
> > opinions (Paolo? :-P).
> 
> I think the disk cache should not be counted in the memory locking
> limit.

Hmm, I guess you're right. However, we're computing a limit and I feel
like allowing QEMU to lock a bit more shouldn't make any bad effects or
am I wrong? On the other hand, it would be pretty easy to let the
function know what kind of limit it's going to compute each time it's
called.

> Apart from that, the code you posted below makes sense.

Even with the 1GB addition for VFIO? I have to admit I'm a bit ignorant
of VFIO but shouldn't that limit be derived from the number of attached
devices (similarly to what we do with dick caches)?

Thanks,

Jirka

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