Messages in this thread | | | Date | Sun, 14 Jan 2018 11:52:01 +0100 (CET) | From | Thomas Gleixner <> | Subject | Re: [PATCH] x86,perf: Disable intel_bts when PTI |
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On Sun, 14 Jan 2018, Greg KH wrote:
> On Sun, Jan 14, 2018 at 11:27:13AM +0100, Peter Zijlstra wrote: > > > > The intel_bts driver does not use the 'normal' BTS buffer we allocated > > space for in the cpu_entry_area but instead uses the memory allocated > > for the perf AUX buffer. > > > > This obviously comes apart when using PTI because then the kernel > > mapping; which includes that AUX buffer memory; disappears. > > > > For now disable this driver when PTI is enabled, we'll try and sort > > something out later. > > > > Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> > > Reported-by: Vince Weaver <vincent.weaver@maine.edu> > > Reported-by: Robert Święcki <robert@swiecki.net> > > Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> > > Can you add a: > Cc: stable <stable@vger.kernel.org> > please?
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