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Kevin Wolf 1ebf561c11 qcow2: Discard VM state in active L1 after creating snapshot 
During savevm, the VM state is written to the active L1 of the image and
then a snapshot is taken. After that, the VM state isn't needed any more
in the active L1 and should be discarded. This is implemented by this
patch.

The impact of not discarding the VM state is that a snapshot can never
become smaller than any previous snapshot (because it would be padded
with old VM state), and more importantly that future savevm operations
cause unnecessary COWs (with associated flushes), which makes subsequent
snapshots much slower.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
2013-09-12 10:12:46 +02:00
audio aio / timers: Switch entire codebase to the new timer API 2013-08-22 19:14:24 +02:00
backends aio / timers: Switch entire codebase to the new timer API 2013-08-22 19:14:24 +02:00
block qcow2: Discard VM state in active L1 after creating snapshot 2013-09-12 10:12:46 +02:00
bsd-user gdbstub: Change gdb_handlesig() argument to CPUState 2013-07-23 02:41:33 +02:00
default-configs default-configs: Fix A9MP and A15MP config names 2013-08-20 14:54:32 +01:00
disas disas/ppc.c: Fix little endian disassembly 2013-09-02 10:06:41 +02:00
docs qcow2: Add corrupt bit 2013-08-30 15:48:43 +02:00
dtc@bc895d6d09 dtc: add submodule 2013-04-18 13:50:53 +02:00
fpu softfloat: Fix shift128Right for shift counts 64..127 2013-06-10 11:36:12 -05:00
fsdev fsdev: Fix potential memory leak 2013-07-09 13:38:56 -05:00
gdb-xml target-arm: Add AArch64 gdbstub support 2013-09-10 19:11:28 +01:00
hw ARM queue: 2013-09-11 14:46:52 -05:00
include ARM queue: 2013-09-11 14:46:52 -05:00
libcacard misc: Fix some typos in names and comments 2013-09-01 18:59:24 +04:00
linux-headers misc: Fix some typos in names and comments 2013-09-01 18:59:24 +04:00
linux-user linux-user: Add AArch64 support 2013-09-10 19:11:29 +01:00
net net: Rename send_queue to incoming_queue 2013-09-06 17:01:26 +02:00
pc-bios Update OpenBIOS images 2013-07-30 23:11:07 +01:00
pixman@97336fad32 qapi: move include files to include/qobject/ 2012-12-19 08:31:31 +01:00
po po: Update all *.po files 2013-08-07 12:48:00 -05:00
qapi OptsVisitor: don't try to flatten overlong integer ranges 2013-08-20 11:52:00 -04:00
qga qemu-ga: Install Windows VSS provider on `qemu-ga -s install' 2013-09-09 14:17:57 -05:00
QMP Merge remote-tracking branch 'mdroth/qga-pull-2013-9-9' into staging 2013-09-11 14:46:08 -05:00
qobject Implement qdict_flatten() 2013-07-26 22:01:31 +02:00
qom QOM CPUState refactorings / X86CPU 2013-09-03 12:33:32 -05:00
roms Update OpenBIOS images 2013-07-30 23:11:07 +01:00
scripts Merge remote-tracking branch 'luiz/queue/qmp' into staging 2013-09-11 14:46:44 -05:00
slirp slirp/arp_table.c: Avoid shifting into sign bit of signed integers 2013-09-01 19:09:09 +04:00
stubs aio / timers: Rearrange timer.h & make legacy functions call non-legacy 2013-08-22 19:14:24 +02:00
sysconfigs/target Eliminate cpus-x86_64.conf file 2012-09-21 15:12:58 +02:00
target-alpha tcg: Change tcg_gen_exit_tb argument to uintptr_t 2013-09-02 09:08:30 -07:00
target-arm target-arm: Add AArch64 gdbstub support 2013-09-10 19:11:28 +01:00
target-cris tcg: Change tcg_gen_exit_tb argument to uintptr_t 2013-09-02 09:08:30 -07:00
target-i386 target-i386: Use #defines instead of magic numbers for CPUID cache info 2013-09-03 12:25:56 +02:00
target-lm32 target: Include softmmu_exec.h where forgotten 2013-09-02 09:08:30 -07:00
target-m68k tcg: Change tcg_gen_exit_tb argument to uintptr_t 2013-09-02 09:08:30 -07:00
target-microblaze tcg: Change tcg_gen_exit_tb argument to uintptr_t 2013-09-02 09:08:30 -07:00
target-mips cpu: Use QTAILQ for CPU list 2013-09-03 12:25:55 +02:00
target-moxie target: Include softmmu_exec.h where forgotten 2013-09-02 09:08:30 -07:00
target-openrisc tcg: Change tcg_gen_exit_tb argument to uintptr_t 2013-09-02 09:08:30 -07:00
target-ppc cpu: Use QTAILQ for CPU list 2013-09-03 12:25:55 +02:00
target-s390x cpu: Use QTAILQ for CPU list 2013-09-03 12:25:55 +02:00
target-sh4 tcg: Change tcg_gen_exit_tb argument to uintptr_t 2013-09-02 09:08:30 -07:00
target-sparc tcg: Change tcg_gen_exit_tb argument to uintptr_t 2013-09-02 09:08:30 -07:00
target-unicore32 target: Include softmmu_exec.h where forgotten 2013-09-02 09:08:30 -07:00
target-xtensa target: Include softmmu_exec.h where forgotten 2013-09-02 09:08:30 -07:00
tcg Merge remote-tracking branch 'mjt/trivial-patches' into staging 2013-09-03 12:31:44 -05:00
tests qemu-iotests: Fixed test case 026 2013-09-06 15:25:10 +02:00
trace trace: Add ftrace tracing backend 2013-05-03 13:58:09 +02:00
ui spice-core: Use g_strdup_printf instead of snprintf 2013-09-10 11:14:08 +02:00
util Merge remote-tracking branch 'mdroth/qga-pull-2013-9-9' into staging 2013-09-11 14:46:08 -05:00
.exrc qemu: add .exrc 2012-09-07 09:02:44 +03:00
.gitignore qemu-ga: Add configure options to specify path to Windows/VSS SDK 2013-09-09 14:17:56 -05:00
.gitmodules pc-bios: Update palcode-clipper 2013-07-18 08:17:42 -07:00
.mailmap Update mailmap 2013-09-05 09:40:31 -05:00
aio-posix.c aio / timers: Convert aio_poll to use AioContext timers' deadline 2013-08-22 19:10:28 +02:00
aio-win32.c aio-win32: replace incorrect AioHandler->opaque usage with ->e 2013-08-22 22:04:54 +02:00
arch_init.c cpu: Replace qemu_for_each_cpu() 2013-09-03 12:25:55 +02:00
async.c aio / timers: aio_ctx_prepare sets timeout from AioContext timers 2013-08-22 19:10:28 +02:00
balloon.c softmmu: move include files to include/sysemu/ 2012-12-19 08:32:45 +01:00
block-migration.c migration: omit drive ref as we have bdrv_ref now 2013-09-06 15:25:08 +02:00
block.c block: look for zero blocks in bs->file 2013-09-06 15:25:09 +02:00
blockdev-nbd.c nbd: use BlockDriverState refcnt 2013-09-06 15:25:08 +02:00
blockdev.c block: use BDS ref for block jobs 2013-09-06 15:25:08 +02:00
blockjob.c block: use BDS ref for block jobs 2013-09-06 15:25:08 +02:00
bt-host.c sysemu: avoid proliferation of include/ subdirectories 2013-04-15 18:19:25 +02:00
bt-vhci.c sysemu: avoid proliferation of include/ subdirectories 2013-04-15 18:19:25 +02:00
Changelog fix some common typos 2012-05-14 07:27:24 +02:00
CODING_STYLE Replace Qemu by QEMU in internal documentation 2012-04-07 13:58:25 +00:00
configure ARM queue: 2013-09-11 14:46:52 -05:00
COPYING
COPYING.LIB
coroutine-gthread.c block: move include files to include/block/ 2012-12-19 08:31:31 +01:00
coroutine-sigaltstack.c Merge remote-tracking branch 'kwolf/for-anthony' into staging 2013-02-26 07:44:39 -06:00
coroutine-ucontext.c Fix warnings suppressors to honor --disable-werror 2013-04-17 10:28:04 -05:00
coroutine-win32.c block: move include files to include/block/ 2012-12-19 08:31:31 +01:00
cpu-exec.c tcg: Fix next_tb type in cpu_exec 2013-09-02 09:08:29 -07:00
cpus.c cpu: Replace qemu_for_each_cpu() 2013-09-03 12:25:55 +02:00
cputlb.c cpu: Use QTAILQ for CPU list 2013-09-03 12:25:55 +02:00
device-hotplug.c hw: move device-hotplug.o to toplevel, compile it once 2013-03-01 13:57:13 +01:00
device_tree.c device_tree: Add qemu_devtree_setprop_sized_cells() utility functions 2013-07-19 12:58:46 +01:00
disas.c disas: Implement fallback to dump object code as hex 2013-08-24 07:26:45 +02:00
dma-helpers.c aio / timers: Untangle include files 2013-08-22 19:10:27 +02:00
dump.c cpu: Use QTAILQ for CPU list 2013-09-03 12:25:55 +02:00
exec.c exec: do tcg_commit only when tcg_enabled 2013-09-05 18:11:52 +02:00
gdbstub.c cpu: Use QTAILQ for CPU list 2013-09-03 12:25:55 +02:00
HACKING HACKING: Document vaddr type usage 2013-07-23 02:41:31 +02:00
hmp-commands.hx Merge remote-tracking branch 'luiz/queue/qmp' into staging 2013-08-30 12:26:04 -05:00
hmp.c Merge remote-tracking branch 'mdroth/qga-pull-2013-9-9' into staging 2013-09-11 14:46:08 -05:00
hmp.h block: add drive_backup HMP command 2013-07-15 09:49:00 +02:00
iohandler.c iohandler: switch to GPollFD 2013-02-21 16:17:31 -06:00
ioport.c memory: Provide separate handling of unassigned io ports accesses 2013-09-05 18:11:43 +02:00
kvm-all.c cpu: Use QTAILQ for CPU list 2013-09-03 12:25:55 +02:00
kvm-stub.c Merge remote-tracking branch 'qemu-kvm/uq/master' into stable-1.5 2013-08-29 17:21:51 -05:00
LICENSE LICENSE: clarify 2013-08-12 09:15:12 -05:00
main-loop.c aio / timers: Rearrange timer.h & make legacy functions call non-legacy 2013-08-22 19:14:24 +02:00
MAINTAINERS MAINTAINERS: Take over 0.15 maintenance 2013-08-22 17:27:43 +02:00
Makefile qemu-ga: Add Windows VSS provider and requester as DLL 2013-09-09 14:17:57 -05:00
Makefile.objs qemu-ga: Add Windows VSS provider and requester as DLL 2013-09-09 14:17:57 -05:00
Makefile.target build: do not use TARGET_ARCH 2013-06-14 15:33:10 +01:00
memory.c Revert "memory: Return -1 again on reads from unsigned regions" 2013-09-05 18:11:48 +02:00
memory_mapping.c cpu: Use QTAILQ for CPU list 2013-09-03 12:25:55 +02:00
migration-exec.c aio / timers: Untangle include files 2013-08-22 19:10:27 +02:00
migration-fd.c aio / timers: Untangle include files 2013-08-22 19:10:27 +02:00
migration-rdma.c rdma: silly ipv6 bugfix 2013-09-01 19:03:43 +04:00
migration-tcp.c aio / timers: Untangle include files 2013-08-22 19:10:27 +02:00
migration-unix.c aio / timers: Untangle include files 2013-08-22 19:10:27 +02:00
migration.c aio / timers: Switch entire codebase to the new timer API 2013-08-22 19:14:24 +02:00
monitor.c QOM CPUState refactorings / X86CPU 2013-09-03 12:33:32 -05:00
nbd.c nbd: use BlockDriverState refcnt 2013-09-06 15:25:08 +02:00
os-posix.c Add option to mlock qemu and guest memory 2013-04-22 08:52:23 -05:00
os-win32.c qemu-timer: move timeBeginPeriod/timeEndPeriod to os-win32 2013-04-12 18:27:16 +02:00
page_cache.c remove some double-includes 2013-05-18 16:35:12 +04:00
qapi-schema.json docs, qapi: document qemu-img map 2013-09-06 15:25:09 +02:00
qdev-monitor.c qemu-help: Sort devices by logical functionality 2013-07-29 10:37:09 -05:00
qdict-test-data.txt
qemu-bridge-helper.c qemu-bridge-helper: force usage of a very high MAC address for the bridge 2013-03-28 12:58:52 -05:00
qemu-char.c Merge remote-tracking branch 'stefanha/block' into staging 2013-08-26 09:19:50 -05:00
qemu-coroutine-io.c aio / timers: Untangle include files 2013-08-22 19:10:27 +02:00
qemu-coroutine-lock.c block: Repair the throttling code. 2013-07-29 17:07:37 +02:00
qemu-coroutine-sleep.c aio / timers: convert block_job_sleep_ns and co_sleep_ns to new API 2013-08-22 19:14:24 +02:00
qemu-coroutine.c coroutine: stop using AioContext in CoQueue 2013-05-24 16:17:56 +02:00
qemu-doc.texi doc: we use seabios, not bochs bios 2013-06-28 22:10:34 +04:00
qemu-img-cmds.hx qemu-img: add a "map" subcommand 2013-09-06 15:25:09 +02:00
qemu-img.c qemu-img: add a "map" subcommand 2013-09-06 15:25:09 +02:00
qemu-img.texi docs, qapi: document qemu-img map 2013-09-06 15:25:09 +02:00
qemu-io-cmds.c block: expect errors from bdrv_co_is_allocated 2013-09-06 15:25:09 +02:00
qemu-io.c block: make bdrv_delete() static 2013-09-06 15:25:08 +02:00
qemu-log.c qemu-log: default to stderr for logging output 2013-02-26 13:31:47 -06:00
qemu-nbd.c aio / timers: Untangle include files 2013-08-22 19:10:27 +02:00
qemu-nbd.texi Add -f FMT / --format FMT arg to qemu-nbd 2013-04-15 14:29:20 -05:00
qemu-options-wrapper.h vl.c: In qemu -h output, only print options for the arch we are running as 2011-12-19 10:27:33 -06:00
qemu-options.h vl.c: Move option generation logic into a wrapper file 2011-12-19 10:27:33 -06:00
qemu-options.hx block: Add iops_size to do the iops accounting for a given io size. 2013-09-06 15:25:07 +02:00
qemu-seccomp.c seccomp: add arch_prctl() to the syscall whitelist 2013-07-29 19:56:52 -05:00
qemu-tech.texi qemu-tech.texi: update implemented xtensa features list 2012-11-29 13:00:52 -06:00
qemu-timer.c aio / timers: Remove legacy interface 2013-08-22 19:14:24 +02:00
qemu.nsi w32, w64: Add build rule for installer 2013-07-29 11:43:37 +02:00
qemu.sasl Fix command example in qemu.sasl 2013-07-19 12:52:03 +04:00
qmp-commands.hx block: Add iops_size to do the iops accounting for a given io size. 2013-09-06 15:25:07 +02:00
qmp.c QMP: Add cpu-add command 2013-05-01 13:06:07 +02:00
qtest.c qtest: Fix FMT_timeval vs time_t 2013-09-02 09:08:29 -07:00
readline.c monitor: avoid use of global *cur_mon in readline_completion() 2013-08-30 07:41:14 -04:00
README Update README 2011-12-11 17:50:43 -06:00
rules.mak configure: Support configuring C++ compiler 2013-09-09 14:17:56 -05:00
savevm.c aio / timers: Switch entire codebase to the new timer API 2013-08-22 19:14:24 +02:00
spice-qemu-char.c qemu-char: don't issue CHR_EVENT_OPEN in a BH 2013-06-10 11:38:37 -05:00
tcg-runtime.c tcg: Implement multiword multiply helpers 2013-02-23 17:25:28 +00:00
tci.c tcg: Change tcg_qemu_tb_exec return to uintptr_t 2013-09-02 09:08:29 -07:00
thread-pool.c aio / timers: Untangle include files 2013-08-22 19:10:27 +02:00
thunk.c exec: move include files to include/exec/ 2012-12-19 08:31:31 +01:00
tpm.c tpm.c: Don't try to put -1 in a variable of type TpmModel 2013-07-29 10:37:10 -05:00
trace-events qxl: trace io port name 2013-09-10 11:14:08 +02:00
translate-all.c cpu: Use QTAILQ for CPU list 2013-09-03 12:25:55 +02:00
translate-all.h cputlb: Pass CPUState to cpu_unlink_tb() 2013-02-16 14:51:00 +01:00
user-exec.c linux-user: fix segmentation fault passing with h2g(x) != x 2013-07-23 17:28:28 +03:00
VERSION Open up 1.7 development branch 2013-08-15 15:41:13 -05:00
version.rc w32: Add an icon resource 2013-08-27 14:21:16 +02:00
vl.c Remove dev-bluetooth.c dependency from vl.c 2013-09-10 11:14:42 +02:00
xbzrle.c Move XBZRLE encoding code to a separate file to allow testing 2013-02-01 08:32:20 +01:00
xen-all.c pc: Initializing ram_memory under Xen. 2013-09-09 16:22:19 +00:00
xen-mapcache.c hw: move headers to include/ 2013-04-08 18:13:10 +02:00
xen-stub.c pc: Initializing ram_memory under Xen. 2013-09-09 16:22:19 +00:00

README 

Read the documentation in qemu-doc.html or on http://wiki.qemu.org

- QEMU team