Peter Zijlstra <[email protected]> writes: > On Mon, Oct 13, 2014 at 04:45:39PM +0300, Alexander Shishkin wrote: >> Intel PT cannot be used at the same time as LBR or BTS and will cause a >> general protection fault if they are used together. In order to avoid >> fixing up GPs in the fast path, instead we use flags to indicate that >> that one of these is in use so that the other avoids MSR access altogether. >> > > Yeah, don't like this. Like I've said many times before we should simply > disallow creating PT events when there are LBR events and vice versa.
Ok, I must have misunderstood you before. This makes things a bit easier. Regards, -- Alex -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
