On Wednesday, October 01, 2014 01:15:57 PM Shreyas B. Prabhu wrote: > Fast sleep is an idle state, where the core and the L1 and L2 > caches are brought down to a threshold voltage. This also means that > the communication between L2 and L3 caches have to be fenced. However > the current P8 chips have a bug wherein this fencing between L2 and > L3 caches get delayed by a cpu cycle. This can delay L3 response to > the other cpus if they request for data during this time. Thus they > would fetch the same data from the memory which could lead to data > corruption if L3 cache is not flushed. > > This series overcomes above problem in kernel. > > Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org> > Cc: Paul Mackerras <pau...@samba.org> > Cc: Michael Ellerman <m...@ellerman.id.au> > Cc: Rafael J. Wysocki <r...@rjwysocki.net> > Cc: linux...@vger.kernel.org > Cc: linuxppc-...@lists.ozlabs.org > Cc: Srivatsa S. Bhat <sriva...@mit.edu> > Cc: Preeti U. Murthy <pre...@linux.vnet.ibm.com> > Cc: Vaidyanathan Srinivasan <sva...@linux.vnet.ibm.com> > > v2: > Rebased on 3.17-rc7 > Split from 'powerpc/powernv: Support for fastsleep and winkle' > > v1: > https://lkml.org/lkml/2014/8/25/446 > > Preeti U Murthy (1): > powerpc/powernv/cpuidle: Add workaround to enable fastsleep > > Shreyas B. Prabhu (1): > powerpc/kvm/book3s_hv: Enable CPUs to run guest after waking up from > fast-sleep > > Srivatsa S. Bhat (1): > powerpc/powernv: Enable Offline CPUs to enter deep idle states > > arch/powerpc/include/asm/machdep.h | 3 + > arch/powerpc/include/asm/opal.h | 7 ++ > arch/powerpc/include/asm/processor.h | 4 +- > arch/powerpc/kernel/exceptions-64s.S | 35 ++++---- > arch/powerpc/kernel/idle.c | 19 ++++ > arch/powerpc/kernel/idle_power7.S | 2 +- > arch/powerpc/platforms/powernv/opal-wrappers.S | 1 + > arch/powerpc/platforms/powernv/powernv.h | 7 ++ > arch/powerpc/platforms/powernv/setup.c | 118 > +++++++++++++++++++++++++ > arch/powerpc/platforms/powernv/smp.c | 11 ++- > drivers/cpuidle/cpuidle-powernv.c | 13 ++- > 11 files changed, 194 insertions(+), 26 deletions(-)
[2/3] seems to be missig from the series. Also, since that mostly modifies arch/powerpc, I think it should go through that tree. I'm fine with the cpuidle-powernv changes in [1/3] and [3/3]. -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center. -- 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/
