On Mon, 17 Feb 2020 12:33:33 -0500
Igor Mammedov <imamm...@redhat.com> wrote:
Paolo,
Can you merge this via your tree if possible, pls?
(You said that's about the time you'd be preparing pull req)
> v5:
> - pick up new Reviewed-by-s
> - drop "ppc/prep: use memdev for RAM" since machine was removed
> - add patch "mips/mips_jazz: add max ram size check"
> - extend comment for "default_ram_id" to clarify that's setting it serves
> as optin flag for -m support. [03/79]
> - rebase "arm/raspi: use memdev for RAM" once more
>
> v4:
> - pick up new Reviewed-by-s
> - Fix access to uninitialized pagesize/hpsize in
> "[PATCH REPOST v3 74/80] exec: cleanup
> qemu_minrampagesize()/qemu_maxrampagesize()"
> - Make explicitly provided memory-backend work by using string property
> instead
> of link so it would be possible to delay access to the backend to the time
> when backends are initialized.
> - added new patches to make explicit backend work nice with -m and do sanity
> check on ram_size
> 'vl.c: move -m parsing after memory backends has been processed'
> 'vl.c: ensure that ram_size matches size of machine.memory-backend"
> all this ram_size business needs cleanup too, but that's out of the scope
> of this series.
> - include m68k/q800 board into conversion
> - drop patches that were merged through other trees
>
> v3:
> - due to libvirt not being ready, postpone till 5.1
> * [PATCH v2 82/86] numa: forbid '-numa node, mem' for 5.0 and newer
> machine types
> and depended
> [PATCH v2 86/86] numa: remove deprecated implicit RAM distribution
> between nodes
> - drop as not related "[PATCH v2 85/86] numa: make exit() usage consistent"
> - drop "[PATCH v2 76/86] post conversion default_ram_id cleanup"
> so that default memory-backedend won't be created for boards that do not
> care
> about -m. Which makes -m optin feature. We should decide what do in case
> board doesn't use -m (but that's out of scope of this series)
> - use object_register_sugar_prop() instead of hacking compat props directly
> - simplified/reworked aspeed patches
> - s/RAM_ADDR_FMT/size_to_str()/
> - rename 'ram-memdev' property to 'memory-backend'
> - minor fixes to numa-test
> - fixes for issues noticed during review of
> [PATCH v2 66/86] ppc/{ppc440_bamboo,sam460x}: drop RAM size fixup
>
> v2:
> - fix compile errors on mingw32 host by introducing RAM_ADDR_UFMT [11/86]
> - replace "[PATCH 43/86] hppa: drop RAM size fixup" with alternative
> patches made by Philippe (which effectively do the same thing but other
> way around)
> - ppc440: fix crash and add suggested valid RAM size in error output.
> s/ppc4xx_sdram_adjust/ppc4xx_sdram_prep/ and simplify it by removing
> not necessary nested loop
> - rebase on current master due to new conflicts
>
>
> Series removes ad hoc RAM allocation API
> (memory_region_allocate_system_memory)
> and consolidates it around hostmem backend. It allows to
> * resolve conflicts between global -mem-prealloc and hostmem's "policy"
> option
> fixing premature allocation before binding policy is applied
> * simplify complicated memory allocation routines which had to deal with 2
> ways
> to allocate RAM.
> * it allows to reuse hostmem backends of a choice for main RAM without adding
> extra CLI options to duplicate hostmem features.
> Recent case was -mem-shared, to enable vhost-user on targets that don't
> support hostmem backends [1] (ex: s390)
> * move RAM allocation from individual boards into generic machine code and
> provide them with prepared MemoryRegion.
> * clean up deprecated NUMA features which were tied to the old API (see
> patches)
> - "numa: remove deprecated -mem-path fallback to anonymous RAM"
> - (POSTPONED, waiting on libvirt side) "forbid '-numa node,mem' for 5.0
> and newer machine types"
> - (POSTPONED) "numa: remove deprecated implicit RAM distribution between
> nodes"
>
> Conversion introduces a new machine.memory-backend property and wrapper code
> that
> aliases global -mem-path and -mem-alloc into automatically created hostmem
> backend properties (provided memory-backend was not set explicitly given by
> user).
> And then follows bulk of trivial patches that incrementally convert individual
> boards to using machine.memory-backend provided MemoryRegion.
>
> Board conversion typically involves:
> * providing MachineClass::default_ram_size and MachineClass::default_ram_id
> so generic code could create default backend if user didn't explicitly
> provide
> memory-backend or -m options
> * dropping memory_region_allocate_system_memory() call
> * using convenience MachineState::ram MemoryRegion, which points to
> MemoryRegion
> allocated by ram-memdev
> On top of that for some boards:
> * added missing ram_size checks (typically it were boards with fixed ram
> size)
> * ram_size fixups were replaced by checks and hard errors, forcing user to
> provide correct "-m" values instead of ignoring it and continuing running.
>
> After all boards are converted the old API is removed and memory allocation
> routines are cleaned up.
>
> git tree for testing:
> https://github.com/imammedo/qemu convert_main_ram_to_memdev_v5
>
> previous rev:
> https://github.com/imammedo/qemu convert_main_ram_to_memdev_v4
>
> CC: Paolo Bonzini <pbonz...@redhat.com>
>
[...]
