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Re: [Xen-devel] [PATCH 3/6] remove late (on-demand) construction of IOMMU page tables

> -----Original Message-----
> From: Jan Beulich <jbeulich@xxxxxxxx>
> Sent: 29 August 2019 10:52
> To: Paul Durrant <Paul.Durrant@xxxxxxxxxx>
> Cc: 'JulienGrall' <julien.grall@xxxxxxx>; 'Alexandru Isaila' 
> <aisaila@xxxxxxxxxxxxxxx>; 'Petre
> Pircalabu' <ppircalabu@xxxxxxxxxxxxxxx>; 'Razvan Cojocaru' 
> <rcojocaru@xxxxxxxxxxxxxxx>; Andrew Cooper
> <Andrew.Cooper3@xxxxxxxxxx>; George Dunlap <George.Dunlap@xxxxxxxxxx>; Ian 
> Jackson
> <Ian.Jackson@xxxxxxxxxx>; Roger Pau Monne <roger.pau@xxxxxxxxxx>; 
> 'VolodymyrBabchuk'
> <Volodymyr_Babchuk@xxxxxxxx>; 'Stefano Stabellini' <sstabellini@xxxxxxxxxx>; 
> 'xen-
> devel@xxxxxxxxxxxxxxxxxxxx' <xen-devel@xxxxxxxxxxxxxxxxxxxx>; 'Konrad 
> Rzeszutek Wilk'
> <konrad.wilk@xxxxxxxxxx>; 'Tamas K Lengyel' <tamas@xxxxxxxxxxxxx>; Tim 
> (Xen.org) <tim@xxxxxxx>; 'Wei
> Liu' <wl@xxxxxxx>
> Subject: Re: [Xen-devel] [PATCH 3/6] remove late (on-demand) construction of 
> IOMMU page tables
> On 29.08.2019 11:33, Paul Durrant wrote:
> > TBH I've seen sufficient numbers of domain create failures when using
> > auto-ballooning that I stopped using it some time ago (besides the fact
> > that it's slow). If you're happy with the simplistic
> > double-the-page-table-reservation calculation then I can add that but
> > IMO it would be better to add another patch to just remove auto-ballooning.
> I'd not be overly happy, but I could live with this. But this needs
> consent by others, not the least the tool stack maintainers.

Ok. I'll deal with that later. Looking again though, I'm not sure what you mean 
by 'the amount reserved for page tables'? Do you mean 'shadow_memkb' or 
something else?

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