David Hildenbrand 8dbe22c686 memory: Introduce RAM_NORESERVE and wire it up in qemu_ram_mmap() ... Let's introduce RAM_NORESERVE, allowing mmap'ing with MAP_NORESERVE. The new flag has the following semantics: " RAM is mmap-ed with MAP_NORESERVE. When set, reserving swap space (or huge pages if applicable) is skipped: will bail out if not supported. When not set, the OS will do the reservation, if supported for the memory type. " Allow passing it into: - memory_region_init_ram_nomigrate() - memory_region_init_resizeable_ram() - memory_region_init_ram_from_file() ... and teach qemu_ram_mmap() and qemu_anon_ram_alloc() about the flag. Bail out if the flag is not supported, which is the case right now for both, POSIX and win32. We will add Linux support next and allow specifying RAM_NORESERVE via memory backends. The target use case is virtio-mem, which dynamically exposes memory inside a large, sparse memory area to the VM. Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com> Acked-by: Eduardo Habkost <ehabkost@redhat.com> for memory backend and machine core Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20210510114328.21835-9-david@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2021-06-15 20:27:38 +02:00
..
aio-posix.c	qmp: Move dispatcher to a coroutine	2020-10-09 07:08:20 +02:00
aio-posix.h
aio-wait.c
aio-win32.c	qmp: fix aio_poll() assertion failure on Windows	2020-11-03 16:24:56 +01:00
aiocb.c
async.c	util/async: Add aio_co_reschedule_self()	2020-10-09 07:08:20 +02:00
atomic64.c
base64.c	nomaintainer: Fix Lesser GPL version number	2020-11-15 17:04:40 +01:00
bitmap.c
bitops.c
block-helpers.c	block: move logical block size check function to a common utility function	2020-10-23 13:42:16 +01:00
block-helpers.h	block: move logical block size check function to a common utility function	2020-10-23 13:42:16 +01:00
buffer.c	nomaintainer: Fix Lesser GPL version number	2020-11-15 17:04:40 +01:00
bufferiszero.c
cacheflush.c	util/cacheflush: Fix error generated by clang	2021-01-21 13:00:41 +01:00
cacheinfo.c	util: Enhance flush_icache_range with separate data pointer	2021-01-07 05:09:41 -10:00
compatfd.c	util/compatfd.c: Replaced a malloc call with g_malloc.	2021-05-14 12:28:01 +02:00
coroutine-sigaltstack.c	coroutine-sigaltstack: Add SIGUSR2 mutex	2021-01-26 14:36:37 +01:00
coroutine-ucontext.c
coroutine-win32.c
crc32c.c
crc-ccitt.c	util: Add CRC16 (CCITT) calculation routines	2021-01-24 20:10:54 +01:00
cutils.c	cutils: fix memory leak in get_relocated_path()	2021-05-13 18:06:40 +02:00
dbus.c
drm.c
envlist.c
error.c
event_notifier-posix.c	event_notifier: Set ->initialized earlier in event_notifier_init()	2021-02-16 17:15:39 +01:00
event_notifier-win32.c
fdmon-epoll.c
fdmon-io_uring.c
fdmon-poll.c
fifo8.c	utils/fifo8: change fatal errors from abort() to assert()	2021-02-07 20:38:20 +00:00
filemonitor-inotify.c	nomaintainer: Fix Lesser GPL version number	2020-11-15 17:04:40 +01:00
filemonitor-stub.c	nomaintainer: Fix Lesser GPL version number	2020-11-15 17:04:40 +01:00
getauxval.c
guest-random.c
hbitmap.c
hexdump.c	util/hexdump: introduce qemu_hexdump_line()	2020-09-29 02:14:30 -04:00
host-utils.c
id.c	net: Use id_generate() in the network subsystem, too	2021-03-09 21:47:45 +01:00
iov.c	util/iov: make qemu_iovec_init_extended() honest	2021-02-03 08:00:33 -06:00
iova-tree.c
keyval.c	keyval: Use GString to accumulate value strings	2020-12-19 10:39:23 +01:00
lockcnt.c
log.c	nomaintainer: Fix Lesser GPL version number	2020-11-15 17:04:40 +01:00
main-loop.c	main-loop: remove dead code	2021-05-11 04:11:14 -04:00
memfd.c
meson.build	util: add transactions.c	2021-04-30 12:27:47 +02:00
mmap-alloc.c	memory: Introduce RAM_NORESERVE and wire it up in qemu_ram_mmap()	2021-06-15 20:27:38 +02:00
module.c	virtio-gpu: add virtio-vga-gl	2021-05-10 13:55:28 +02:00
notify.c
nvdimm-utils.c	Clean up includes	2020-12-10 17:16:44 +01:00
osdep.c	util/osdep: Add qemu_mprotect_rw	2021-06-13 17:42:40 -07:00
oslib-posix.c	memory: Introduce RAM_NORESERVE and wire it up in qemu_ram_mmap()	2021-06-15 20:27:38 +02:00
oslib-win32.c	memory: Introduce RAM_NORESERVE and wire it up in qemu_ram_mmap()	2021-06-15 20:27:38 +02:00
pagesize.c
path.c
qdist.c
qemu-co-shared-resource.c
qemu-config.c	qemu-config: use qemu_opts_from_qdict	2021-06-15 17:17:09 +02:00
qemu-coroutine-io.c
qemu-coroutine-lock.c	coroutine-lock: Reimplement CoRwlock to fix downgrade bug	2021-03-31 10:44:21 +01:00
qemu-coroutine-sleep.c	coroutine-sleep: introduce qemu_co_sleep	2021-05-21 18:22:33 +01:00
qemu-coroutine.c
qemu-error.c	error: rename error_with_timestamp to message_with_timestamp	2021-02-01 10:50:55 +00:00
qemu-openpty.c
qemu-option.c	qemu-option: support accept-any QemuOptsList in qemu_opts_absorb_qdict	2021-05-12 04:06:50 -04:00
qemu-print.c	monitor: Use getter/setter functions for cur_mon	2020-10-09 07:08:19 +02:00
qemu-progress.c
qemu-sockets.c	sockets: Support multipath TCP	2021-06-08 19:36:22 +01:00
qemu-thread-common.h
qemu-thread-posix.c
qemu-thread-win32.c
qemu-timer-common.c	semihosting: Implement SYS_ELAPSED and SYS_TICKFREQ	2021-01-18 10:05:06 +00:00
qemu-timer.c	spapr: rollback 'unplug timeout' for CPU hotunplugs	2021-04-12 12:27:14 +10:00
qht.c
qsp.c
range.c
rcu.c
readline.c	readline: Fix possible array index out of bounds in readline_hist_add()	2021-01-04 11:13:39 +00:00
selfmap.c
stats64.c
sys_membarrier.c
systemd.c
thread-pool.c
throttle.c	Remove superfluous timer_del() calls	2021-01-08 15:13:38 +00:00
timed-average.c
trace-events	docs: fix references to docs/devel/tracing.rst	2021-06-02 06:51:09 +02:00
trace.h
transactions.c	util: add transactions.c	2021-04-30 12:27:47 +02:00
unicode.c
uri.c
userfaultfd.c	migration: introduce UFFD-WP low-level interface helpers	2021-02-08 11:19:51 +00:00
uuid.c
vfio-helpers.c	numa: Teach ram block notifiers about resizeable ram blocks	2021-05-13 18:21:13 +01:00
vhost-user-server.c	util/vhost-user-server: move header to include/	2020-10-23 13:42:16 +01:00
yank.c	yank: Remove dependency on qiochannel	2021-04-01 15:27:44 +04:00