Re: [Xen-devel] [PATCH for-4.12 5/8] pvh/dom0: warn when dom0_mem is not set to a fixed value

[George Dunlap <dunlapg@xxxxxxxxx>]

On Wed, Jan 30, 2019 at 10:37 AM Roger Pau Monne <roger.pau@xxxxxxxxxx> wrote:
>
> There have been several reports of the dom0 builder running out of
> memory when buildign a PVH dom0 without havingf specified a dom0_mem
> value. Print a warning message if dom0_mem is not set to a fixed value
> when booting in PVH mode.
>
> Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
> ---
> Cc: Jan Beulich <jbeulich@xxxxxxxx>
> Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
> Cc: Juergen Gross <jgross@xxxxxxxx>
> ---
> Without this patch creating a PVH dom0 without a dom0_mem parameter
> can result in the dom0 builder running out of memory thus leading to a
> Xen crash. The added message gives a hit to the user about a possible
> fix.

But why would it run out of memory?  Wouldn't it be better to find and
fix the root cause?

 -George

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