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[PATCH v1 00/13] migrate/ram: Fix resizing RAM blocks while migrating
From: |
David Hildenbrand |
Subject: |
[PATCH v1 00/13] migrate/ram: Fix resizing RAM blocks while migrating |
Date: |
Wed, 19 Feb 2020 17:17:12 +0100 |
This is the follow up of
"[PATCH RFC] memory: Don't allow to resize RAM while migrating" [1]
This series contains some (slightly modified) patches also contained in:
"[PATCH v2 fixed 00/16] Ram blocks with resizable anonymous allocations
under POSIX" [2]
That series will be based on this series. The last patch (#13) in this
series could be moved to the other series, but I decided to include it in
here for now (similar context).
I realized that resizing RAM blocks while the guest is being migrated
(precopy: resize while still running on the source, postcopy: resize
while already running on the target) is buggy. In case of precopy, we
can simply cancel migration. Postcopy handling is more involved. Resizing
can currently happen during a guest reboot, triggered by ACPI rebuilds.
Along with the fixes, some cleanups.
[1] https://lkml.kernel.org/r/address@hidden
[2] https://lkml.kernel.org/r/address@hidden
David Hildenbrand (13):
util: vfio-helpers: Factor out and fix processing of existing ram
blocks
stubs/ram-block: Remove stubs that are no longer needed
numa: Teach ram block notifiers about resizeable ram blocks
numa: Make all callbacks of ram block notifiers optional
migrate/ram: Handle RAM block resizes during precopy
migrate/ram: Discard new RAM when growing RAM blocks and the VM is
stopped
migrate/ram: Get rid of "place_source" in ram_load_postcopy()
migrate/ram: Simplify host page handling in ram_load_postcopy()
migrate/ram: Consolidate variable reset after placement in
ram_load_postcopy()
migrate/ram: Handle RAM block resizes during postcopy
migrate/multifd: Print used_length of memory block
migrate/ram: Use offset_in_ramblock() in range checks
migrate/ram: Tolerate partially changed mappings in postcopy code
exec.c | 23 +++++-
hw/core/numa.c | 41 ++++++++++-
hw/i386/xen/xen-mapcache.c | 7 +-
include/exec/cpu-common.h | 1 +
include/exec/memory.h | 10 ++-
include/exec/ramblock.h | 9 +++
include/exec/ramlist.h | 13 +++-
migration/migration.c | 9 ++-
migration/migration.h | 1 +
migration/multifd.c | 2 +-
migration/postcopy-ram.c | 58 ++++++++++++---
migration/ram.c | 147 +++++++++++++++++++++++++++----------
stubs/ram-block.c | 20 -----
target/i386/hax-mem.c | 5 +-
target/i386/sev.c | 18 +++--
util/vfio-helpers.c | 41 ++++-------
16 files changed, 280 insertions(+), 125 deletions(-)
--
2.24.1
- [PATCH v1 00/13] migrate/ram: Fix resizing RAM blocks while migrating,
David Hildenbrand <=
- [PATCH v1 01/13] util: vfio-helpers: Factor out and fix processing of existing ram blocks, David Hildenbrand, 2020/02/19
- [PATCH v1 02/13] stubs/ram-block: Remove stubs that are no longer needed, David Hildenbrand, 2020/02/19
- [PATCH v1 03/13] numa: Teach ram block notifiers about resizeable ram blocks, David Hildenbrand, 2020/02/19
- [PATCH v1 04/13] numa: Make all callbacks of ram block notifiers optional, David Hildenbrand, 2020/02/19
- [PATCH v1 06/13] migrate/ram: Discard new RAM when growing RAM blocks and the VM is stopped, David Hildenbrand, 2020/02/19