v4: --- * fix indent in tracepoint (thanks Janosch) v3: --- * rename te -> entry (David) * add counters for gmap reuse and gmap create (David) v2: --- * also count shadowing of pages (Janosch) * fix naming of counters (Janosch) * mention shadowing of multiple levels is counted in each level (Claudio) * fix inaccuate commit description regarding gmap notifier (Claudio) When running a guest-3 via VSIE, guest-1 needs to shadow the page table structures of guest-2. To reflect changes of the guest-2 in the _shadowed_ page table structures, the _shadowing_ sturctures sometimes need to be rebuilt. Since this is a costly operation, it should be avoided whenever possible. This series adds kvm stat counters to count the number of shadow gmaps created and a tracepoint whenever something is unshadowed. This is a first step to try and improve VSIE performance. Please note that "KVM: s390: add tracepoint in gmap notifier" has some checkpatch --strict findings. I did not fix these since the tracepoint definition would then look completely different from all the other tracepoints in arch/s390/kvm/trace-s390.h. If you want me to fix that, please let me know. Nico Boehr (2): KVM: s390: add stat counter for shadow gmap events KVM: s390: add tracepoint in gmap notifier arch/s390/include/asm/kvm_host.h | 7 +++++++ arch/s390/kvm/gaccess.c | 7 +++++++ arch/s390/kvm/kvm-s390.c | 11 ++++++++++- arch/s390/kvm/trace-s390.h | 23 +++++++++++++++++++++++ arch/s390/kvm/vsie.c | 5 ++++- 5 files changed, 51 insertions(+), 2 deletions(-) -- 2.41.0
