Refer to https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v4.15&id=99a9dc98ba52267ce5e062b52de88ea1f1b2a7d8 where this is disabled, not fixed. On Thu, Feb 1, 2018 at 2:47 PM, Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > On Thu, Feb 01, 2018 at 09:18:43AM -0500, Vince Weaver wrote: >> On Thu, 1 Feb 2018, gregkh@xxxxxxxxxxxxxxxxxxx wrote: >> >> > >> > This is a note to let you know that I've just added the patch titled >> > >> > kaiser: fix intel_bts perf crashes >> > >> > to the 4.4-stable tree which can be found at: >> > http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary >> > >> > The filename of the patch is: >> > kaiser-fix-intel_bts-perf-crashes.patch >> > and it can be found in the queue-4.4 subdirectory. >> > >> > If you, or anyone else, feels it should not be added to the stable tree, >> > please let <stable@xxxxxxxxxxxxxxx> know about it. >> >> I thought that to get into stable the patch had to be in upstream first. >> >> As far as I know, there is no fix for this particular problem (BTS >> disabled due to KPTI caused crashes) upstream. > > Really? This is a reported issue in 4.15? I haven't seen that report > anywhere, do you have a pointer to it? > > The 4.4 and 4.9 backports do have odd one-off patches that are not in > 4.14 and newer due to the way the backports were done, so they will > diverge. But they should not diverge in bugfixes :) > > thanks, > > greg k-h