On Wed, Jul 18, 2018 at 11:29:50AM +0200, Greg KH wrote: > On Wed, Jul 18, 2018 at 08:41:28AM +0800, Jin, Yao wrote: > > Hi, > > > > The stable kernel 4.9.112 has supported Intel uncore feature in perf core. > > While it also needs the perf tool supporting to let perf uncore feature > > work. > > > > Following backport patches enables basic perf uncore feature in 4.9.112. > > > > For example, on skylake desktop, > > Why would anyone care about this on a "desktop" for 4.9? No one should > be using 4.9.y on a desktop anymore, it's over 2 years old, why would > they expect any "new" hardware support to work for them? Why can't they It's actually not new hardware support: Skylake is fairly old hardware at this point. > just use 4.14.y or better yet. 4.17.y? Desktops should NOT be using a 2 > year old kernel. > > Heck, servers shouldn't either, but that's a totally different rant. These chips are not only used in desktops but also in servers. > However, for hardware that is newer than the base kernel version > release, I have no sympathy. Just use a newer kernel, right? We have customers which are on old kernels with new hardware. The backports happen either way. This is just an attempt to do it in a coordinated fashion. > What distro relies on a 4.9 kernel for brand new hardware that does not > already support a newer kernel release for such hardware? None afaik, but there is a lot of Linux use beyond distros. -Andi
