On Sun, May 10, 2015 at 12:22:47PM -0700, Andi Kleen wrote: > From: Andi Kleen <a...@linux.intel.com> > > With Arch Perfmon v4 the PMU ack unfreezes the LBRs. So we need to do > the PMU ack after the LBR reading, otherwise the LBRs would be polluted by the > PMI handler.
Hmm, we should move these last three patches before the SKL enablement patch no, otherwise things will misbehave -- say a bisection lands in between. /me shuffles patches. > This is a minimal change. In principle the ACK could be moved much later. Right, so the more complete change would be to use the new and improved FREEZE_ON_PMI and reenable both the LBRs and the CTRs with the STATUS_RESET MSR, right? Does it make sense to have a new handle_irq() routine for that? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
