Denis V. Lunev 19e8b59626 system/cpus: refuse memsave/pmemsave while guest RAM is being migrated ...

memsave and pmemsave read guest memory and write it to a file, with no
guard at all. They run on the main thread with the BQL held, so on a
postcopy destination touching a not-yet-received page deadlocks: the
thread blocks on the userfault while the postcopy incoming path waits for
the BQL to install that page. During precopy the read returns incomplete
state instead.

Refuse both while guest RAM is still being received, using the same
migration_guest_ram_loading() check as dump-guest-memory.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20260619101834.228432-4-den@openvz.org>

2026-06-30 19:12:59 +04:00

..

arch_init.c

system: Expose 'arch_init.h' as 'qemu/base-arch-defs.h'

2026-05-06 12:58:08 +02:00

async-teardown.c

qemu/osdep: Add excluded fd parameter to qemu_close_all_open_fd()

2024-08-05 08:21:59 +10:00

balloon.c

include: Rename sysemu/ -> system/

2024-12-20 17:44:56 +01:00

bootdevice.c

include: move hw/qdev-core.h to hw/core/, rename

2025-12-27 10:11:07 +01:00

cpu-timers.c

cpus: properly kick CPUs out of inner execution loop

2025-09-17 19:00:55 +02:00

cpus.c

system/cpus: refuse memsave/pmemsave while guest RAM is being migrated

2026-06-30 19:12:59 +04:00

device_tree-stub.c

hw/core/machine.c: Make -machine dumpdtb=file.dtb with no DTB an error

2025-02-25 15:32:57 +00:00

device_tree.c

include: move hw/loader.h to hw/core/

2025-12-27 10:11:07 +01:00

dirtylimit.c

include/qemu/atomic: Drop qatomic_{read,set}_[iu]64

2026-01-17 10:46:51 +11:00

dma-helpers.c

include/exec: Split out icount.h

2025-04-23 14:08:44 -07:00

exit-with-parent.c

system/exit-with-parent: Close the file descriptor before exit

2026-05-28 17:53:48 +02:00

globals.c

system/globals: Build as common code

2026-02-23 00:17:34 +01:00

ioport.c

system/ioport: minor code simplification

2026-06-06 09:15:23 +04:00

main.c

system/main: comment lock rationale

2025-05-28 08:07:59 +01:00

memory_ldst_endian.c.inc

system/memory: Directly call address_space_ldst[M]_internal() helper

2026-01-22 10:48:45 +01:00

memory_ldst.c.inc

system: Allow restricting legacy address_space_ldst() native-endian API

2026-01-22 10:48:45 +01:00

memory_mapping.c

system/memory: constify section arguments

2026-06-22 17:08:48 -04:00

memory-internal.h

system/memory: Rename cpu_exec_init_all() -> machine_memory_init()

2026-06-18 14:27:21 +02:00

memory.c

system/memory: add RamDiscardManager reference counting and cleanup

2026-06-22 17:08:48 -04:00

meson.build

system/memory: move RamDiscardManager to separate compilation unit

2026-06-22 17:08:48 -04:00

physmem.c

system/physmem: make ram_block_discard_range() handle guest_memfd

2026-06-22 17:08:49 -04:00

qdev-monitor.c

hw/hexagon: Add machine configs for sysemu

2026-06-29 06:03:00 -07:00

qemu-seccomp.c

include: Rename sysemu/ -> system/

2024-12-20 17:44:56 +01:00

qtest.c

irq: add per-IRQ observer to fix qemu_irq_intercept_in leak

2026-06-24 15:41:14 +04:00

ram-block-attributes.c

system/memory: implement RamDiscardManager multi-source aggregation

2026-06-22 17:08:48 -04:00

ram-discard-manager.c

system/memory: add RamDiscardManager reference counting and cleanup

2026-06-22 17:08:48 -04:00

rtc.c

system/rtc: Fix a possible year-2038 integer overflow problem

2026-06-12 17:56:30 +03:00

runstate-action.c

include: Rename sysemu/ -> system/

2024-12-20 17:44:56 +01:00

runstate-hmp-cmds.c

monitor: Extract completion declarations to 'monitor/hmp-completion.h'

2026-05-06 12:58:07 +02:00

runstate.c

Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

2026-06-27 23:06:04 -04:00

tpm-hmp-cmds.c

…

tpm.c

tpm: "qemu -tpmdev help" should return success

2025-07-15 10:22:33 +04:00

trace-events

system/physmem: make ram_block_discard_range() handle guest_memfd

2026-06-22 17:08:49 -04:00

trace.h

…

vl.c

hw/9pfs: add max_xattr option

2026-06-29 15:10:31 +02:00

watchpoint.c

include/exec: Split out watchpoint.h

2025-04-23 14:08:36 -07:00