* Andy Lutomirski <luto@xxxxxxxxxx> wrote: > Ingo, before applying this, please apply these two KASAN fixes: > > http://lkml.kernel.org/g/1452516679-32040-2-git-send-email-aryabinin@xxxxxxxxxxxxx > http://lkml.kernel.org/g/1452516679-32040-3-git-send-email-aryabinin@xxxxxxxxxxxxx > > Without those fixes, this series will trigger a KASAN bug. > > This is a straightforward speedup on Ivy Bridge and newer, IIRC. > (I tested on Skylake. INVPCID is not available on Sandy Bridge. > I don't have Ivy Bridge, Haswell or Broadwell to test on, so I > could be wrong as to when the feature was introduced.) > > I think we should consider these patches separately from the rest > of the PCID stuff -- they barely interact, and this part is much > simpler and is useful on its own. > > This is exactly identical to patches 2-4 of the PCID RFC series. > > Andy Lutomirski (3): > x86/mm: Add INVPCID helpers > x86/mm: Add a noinvpcid option to turn off INVPCID > x86/mm: If INVPCID is available, use it to flush global mappings > > Documentation/kernel-parameters.txt | 2 ++ > arch/x86/include/asm/tlbflush.h | 50 +++++++++++++++++++++++++++++++++++++ > arch/x86/kernel/cpu/common.c | 16 ++++++++++++ > 3 files changed, 68 insertions(+) Ok, I'll pick these up tomorrow unless there are objections. Thanks, Ingo -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>