On 31/07/2019 17:50, Dave Hansen wrote:

On 7/23/19 10:58 AM, Andrey Konovalov wrote:

quoted

The mmap and mremap (only new_addr) syscalls do not currently accept
tagged addresses. Architectures may interpret the tag as a background
colour for the corresponding vma.

What the heck is a "background colour"? :)

Good point, this is some jargon that we started using for MTE, the idea being that 
the kernel could set a tag value (specified during mmap()) as "background colour" for 
anonymous pages allocated in that range.

Anyway, this patch series is not about MTE. Andrey, for v20 (if any), I think it's 
best to drop this last sentence to avoid any confusion.

Kevin