On 22/04/15 12:56, Jan Beulich wrote:
> Instead saturate the value if the input can't be represented in the
> respective struct domain field.
>
> Signed-off-by: Jan Beulich <jbeul...@suse.com>
Reviewed-by: Andrew Cooper <andrew.coop...@citrix.com>
Do I take it you have a 16TB guest to hand?
>
> --- a/xen/common/domctl.c
> +++ b/xen/common/domctl.c
> @@ -944,7 +944,7 @@ long do_domctl(XEN_GUEST_HANDLE_PARAM(xe
>
> case XEN_DOMCTL_max_mem:
> {
> - unsigned long new_max = op->u.max_mem.max_memkb >> (PAGE_SHIFT - 10);
> + uint64_t new_max = op->u.max_mem.max_memkb >> (PAGE_SHIFT - 10);
>
> spin_lock(&d->page_alloc_lock);
> /*
> @@ -952,7 +952,7 @@ long do_domctl(XEN_GUEST_HANDLE_PARAM(xe
> * that the domain will now be allowed to "ratchet" down to new_max.
> In
> * the meantime, while tot > max, all new allocations are disallowed.
> */
> - d->max_pages = new_max;
> + d->max_pages = min(new_max, (uint64_t)(typeof(d->max_pages))-1);
> spin_unlock(&d->page_alloc_lock);
> break;
> }
>
>
>
>
>
> _______________________________________________
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