On 10.08.21 19:28, Julien Grall wrote:
Hi Julien.
On 09/08/2021 22:18, Oleksandr wrote:
On 09.08.21 23:45, Julien Grall wrote:
Hi Julien
Hi Oleksandr,
On 09/08/2021 19:24, Oleksandr wrote:
On 09.08.21 18:42, Julien Grall wrote:
1. If IOMMU is enabled for Dom0 -> provide holes found in Host DT
as safe ranges
I would take into the account holes >= 1MB.
May I ask why 1MB?
Nothing special, just thinking to not bother with small regions which
would not be too useful overall, but could bloat resulting reg property.
Anyway, I would be ok with any sizes.
I was more interesting with the reasoning behind your choice rather
than saying we want more.
I agree that we may want to skip smaller region. I am guess that an
high number of small regions will also increase the bookeeping in Linux.
But I would probably suggest to align the safe region to a 2MB
(superpage for 4KB page granularity) just because the backend (or even
Xen) may be able to do some optimization there.
OK, agree regarding the alignment. But, what about the size? I assume,
it should be a multiple of 2MB.
Cheers,
--
Regards,
Oleksandr Tyshchenko
