Messages in this thread | | | Date | Sun, 14 Jan 2018 11:50:03 +0100 | From | Greg KH <> | Subject | Re: [PATCH] x86,perf: Disable intel_bts when PTI |
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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?
thanks,
greg k-h
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