On Mon, Apr 26, 2021 at 11:00:56AM -0700, Jianxiong Gao wrote:
On Sat, Apr 24, 2021 at 7:43 AM Greg KH <greg@xxxxxxxxx> wrote:
Ok, and what prevents you from adding this new feature do your "custom"
kernel, or to use 5.12 instead?
This is a new feature that Linux has never supported, and these patches
are not "trivial" at all. I also do not see the maintainer of the
subsystem agreeing that these are needed to be backported, which is not
a good sign.
So this is not about a new feature. This is about an existing bug that
we stumbled onto while using SEV virtualization. However SEV is not
needed to trigger the bug. We have reproduced the bug with just
NVMe + SWIOTLB=force option in Rhel 8 environment. Please note
that NVMe and SWIOTLB=force are both existing feature and without
the patch they don't work together. This is why we are proposing to merge
the patches into the LTS kernels.
Could you re-spin this series with the comments around patch formatting
addressed, and explicitly cc hch on this to get his ack?
--
Thanks,
Sasha
