On Wed, May 19, 2021 at 09:42:42AM -0700, Jianxiong Gao wrote: > On Wed, May 19, 2021 at 1:11 AM Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > > > I still fail to understand why you can not just use the 5.10.y kernel or > > newer. What is preventing you from doing this if you wish to use this > > type of hardware? This is not a "regression" in that the 5.4.y kernel > > has never worked with this hardware before, it feels like a new feature. > > > NVMe + SWIOTLB is not a new feature. From my understanding it should > be supported by 5.4.y kernel correctly. Currently without the patch, any > NVMe device (along with some other devices that relies on offset to > work correctly), could be broken if the SWIOTLB is used on a 5.4.y kernel. Then do not do that, as obviously it never worked without your fixes, so this isn't a "regression". And again, why can you not just use 5.10.y? thanks, greg k-h
