>>> On 05.10.17 at 01:27, <andrew.coop...@citrix.com> wrote:
> As for TMEM itself (Julien: This my no means blocks the patch. It is
> more an observation for Konrad to see about fixing), I see that TMEM is
> broken on x86 machines with more than 5TB of RAM, because it is not
> legal to call page_to_virt() on a struct page_info allocated from the
> domheap (which is why alloc_xenheap_page() returns a void *, and
> alloc_domheap_page() specifically doesn't). The easy fix for this is to
> swap the allocation primitives over to using xenheap allocations, which
> would remove the need for page_to_virt() and back, or a better fix would
> be to not pass everything thing by virtual address (at which point
> retaining use of the domheap is fine).
For this reason we have
if ( tmem_enabled() )
{
printk(XENLOG_WARNING
"TMEM physical RAM limit exceeded, disabling TMEM\n");
tmem_disable();
}
in setup.c.
Jan
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