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Re: [PATCH 6/7] xen/arch/x86/dom0_build.c: Extend the upper limit for Dom0's max_pages
- To: Bernhard Kaindl <bernhard.kaindl@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 2 Jun 2026 14:56:13 +0200
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Teddy Astie <teddy.astie@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Tue, 02 Jun 2026 12:57:11 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 29.05.2026 14:44, Bernhard Kaindl wrote:
> dom0_compute_nr_pages(): Update the upper limit for Dom0's max_pages
> in dom0_compute_nr_pages() to limit from UINT_MAX to ULONG_MAX.
>
> Signed-off-by: Bernhard Kaindl <bernhard.kaindl@xxxxxxxxxx>
> ----
> Creating a Dom0 of > 16TB isn't a useful thing,
How do you know?
> but could be for testing.
> ---
> xen/arch/x86/dom0_build.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/xen/arch/x86/dom0_build.c b/xen/arch/x86/dom0_build.c
> index 80308ca9af46..2ebb8308fbaf 100644
> --- a/xen/arch/x86/dom0_build.c
> +++ b/xen/arch/x86/dom0_build.c
> @@ -440,7 +440,7 @@ unsigned long __init dom0_compute_nr_pages(
> }
> }
>
> - d->max_pages = min_t(unsigned long, max_pages, UINT_MAX);
> + d->max_pages = min_t(unsigned long, max_pages, ULONG_MAX);
With this there's no need to use the (type-unsafe) min_t() anymore.
Wherever possible we want to use (type-safe) min().
Jan
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