This patchset fixes the migration of storage attributes. Each memory slot has a bitmap, with 2 bits per page, used to keep track of dirty pages during migration. We only use one bit, the other would be wasted. With this patch, the second bit is now used to keep track of dirty storage attributes. This means that we do not need anymore to allocate and manage the additional bitmap, and no extra work is needed to keep track of memory slots. The code does get a little bit more complicated when accounting for the memory slots, but overall it should be more robust. the first patch simply introduces two auxiliary functions, while the second patch does the actual job. Claudio Imbrenda (2): KVM: s390x: some utility functions for migration KVM: s390: Fix storage attributes migration with memory slots arch/s390/include/asm/kvm_host.h | 9 +- arch/s390/kvm/kvm-s390.c | 286 +++++++++++++++++++++++++-------------- arch/s390/kvm/priv.c | 33 +++-- 3 files changed, 208 insertions(+), 120 deletions(-) -- 2.7.4
