Greetings, good news, I got performance results for a selected set of workloads with my software dirty bit patch (thanks Christian!). We found no downsides to the software dirty bits, and a substantial improvement in CPU utilization for the FIO test with mostly read mappings. All good, the patch can now go upstream. The patch changes common memory management code but the parts that are removed are purely s390 specific. I can handle it via the linux-s390 tree but I would not mind if it gets the sign-off by the mm folks. Martin Schwidefsky (1): s390/mm: implement software dirty bits arch/s390/include/asm/page.h | 22 ------- arch/s390/include/asm/pgtable.h | 131 ++++++++++++++++++++++++++------------- arch/s390/include/asm/sclp.h | 1 - arch/s390/include/asm/setup.h | 16 ++--- arch/s390/kvm/kvm-s390.c | 2 +- arch/s390/lib/uaccess_pt.c | 2 +- arch/s390/mm/pageattr.c | 2 +- arch/s390/mm/vmem.c | 24 +++---- drivers/s390/char/sclp_cmd.c | 10 +-- include/asm-generic/pgtable.h | 10 --- include/linux/page-flags.h | 8 --- mm/rmap.c | 24 ------- 12 files changed, 112 insertions(+), 140 deletions(-) -- 1.7.9.5 -- 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>