Messages in this thread | | | Date | Mon, 09 Apr 2012 17:56:11 +0100 | From | "Jan Beulich" <> | Subject | Re: [Xen-devel] [PATCH 6/7] xen/setup: Make dom0_mem=XGB behavior be similar to classic Xen kernels. |
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>>> Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 04/06/12 11:04 PM >>> >> With your new behaviour it will no longer possible to specify an >> unlimited balloon but a limited number of initial pages. This is >> behaviour that Jan said he used. > >I am not sure I see the problem - I mean if one uses: > >dom0_mem=min:8G,max:16G > >I understand that we want to start at 8GB and if the user >choose to - balloon up to 16GB. > >But doing this: > >dom0_mem=8G > >and allocating pagetables up to .. say 32GB, seems counter-intuive >as the effect is similar to having no 'dom0_mem' except that the initial >size is smaller.
What's counter intuitive here? There may not be a need - from the perspective of the kernel - for a hard upper limit enforced by Xen (i.e. the pseudo infinity we have right now may be quite fine).
Anyway, as said in the other reply already - unless this is to address a bug, I don't see the point in changing behavior that has been that way for a pretty long time.
Jan
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