On 8/1/19 5:48 AM, Andrey Konovalov wrote: > On Thu, Aug 1, 2019 at 2:11 PM Kevin Brodsky <kevin.brodsky@xxxxxxx> wrote: >> On 31/07/2019 17:50, Dave Hansen wrote: >>> On 7/23/19 10:58 AM, Andrey Konovalov wrote: >>>> 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. > Sure, thanks! OK, but what does that mean for tagged addresses getting passed to mmap/mremap? That sentence read to me like "architectures might allow tags for ...something...". So do we accept tagged addresses into those syscalls?
