This was inspired by https://bugzilla.redhat.com/show_bug.cgi?id=1481593 Previous versions: v1: https://lists.gnu.org/archive/html/qemu-devel/2017-09/msg01559.html v2: https://lists.gnu.org/archive/html/qemu-devel/2017-09/msg04069.html v3: https://lists.gnu.org/archive/html/qemu-devel/2017-09/msg04523.html v4: https://lists.gnu.org/archive/html/qemu-devel/2017-09/msg05669.html
This patchset tries to reduce amount of memory used by FlatViews and tries share as many FVs between address spaces as possible. Changelog: v5: * removed "memory: Give memory_region_transaction_commit a hint" (broken) * added "memory: Avoid temporary FlatView allocation in a single child case" but I suggest ditching it, it is just there to demonsrate how I checked the suggested idea * updated example of "info mtree -f -d" in 14/18 to demonstrate the result v4: * total rework again to provide grounds for new 15/18, 17/18, 18/18 v3: * addressed comments from v2, mainly simplified the code v2: * total rework This is based on sha1 c51700273a Peter Maydell "Merge remote-tracking branch 'remotes/cohuck/tags/s390x-20170919-v2' into staging". Please comment. Thanks. Alexey Kardashevskiy (18): exec: Explicitly export target AS from address_space_translate_internal memory: Open code FlatView rendering memory: Move FlatView allocation to a helper memory: Move AddressSpaceDispatch from AddressSpace to FlatView memory: Remove AddressSpace pointer from AddressSpaceDispatch memory: Switch memory from using AddressSpace to FlatView memory: Cleanup after switching to FlatView memory: Rename mem_begin/mem_commit/mem_add helpers memory: Store physical root MR in FlatView memory: Alloc dispatch tree where topology is generared memory: Move address_space_update_ioeventfds memory: Share FlatView's and dispatch trees between address spaces memory: Do not allocate FlatView in address_space_init memory: Rework "info mtree" to print flat views and dispatch trees memory: Share special empty FlatView memory: Get rid of address_space_init_shareable memory: Create FlatView directly memory: Avoid temporary FlatView allocation in a single child case include/exec/memory-internal.h | 16 +- include/exec/memory.h | 76 +++++----- include/hw/arm/armv7m.h | 2 +- cpus.c | 5 +- exec.c | 330 ++++++++++++++++++++++++---------------- hw/arm/armv7m.c | 9 +- hw/intc/openpic_kvm.c | 2 +- memory.c | 335 +++++++++++++++++++++++++++++++---------- monitor.c | 3 +- target/arm/cpu.c | 16 +- target/i386/cpu.c | 5 +- hmp-commands-info.hx | 7 +- 12 files changed, 533 insertions(+), 273 deletions(-) -- 2.11.0