Re: [PATCH] x86,perf: Disable intel_bts when PTI

[Greg KH]

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@xxxxxxxxxxxxxxx>
> Reported-by: Vince Weaver <vincent.weaver@xxxxxxxxx>
> Reported-by: Robert ÅwiÄcki <robert@xxxxxxxxxxx>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>

Can you add a:
	Cc: stable <stable@xxxxxxxxxxxxxxx>
please?

thanks,

greg k-h