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Leonid Bloch b749562d98 qcow2: Assign the L2 cache relatively to the image size 
Sufficient L2 cache can noticeably improve the performance when using
large images with frequent I/O.

Previously, unless 'cache-size' was specified and was large enough, the
L2 cache was set to a certain size without taking the virtual image size
into account.

Now, the L2 cache assignment is aware of the virtual size of the image,
and will cover the entire image, unless the cache size needed for that is
larger than a certain maximum. This maximum is set to 1 MB by default
(enough to cover an 8 GB image with the default cluster size) but can
be increased or decreased using the 'l2-cache-size' option. This option
was previously documented as the *maximum* L2 cache size, and this patch
makes it behave as such, instead of as a constant size. Also, the
existing option 'cache-size' can limit the sum of both L2 and refcount
caches, as previously.

Signed-off-by: Leonid Bloch <lbloch@janustech.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
 		2018-10-01 12:51:12 +02:00
..
acceptance Acceptance tests: add Linux kernel boot and console checking test 2018-06-15 16:10:11 -03:00
acpi-test-data tests: update acpi expected files 2018-09-07 17:43:22 -04:00
data
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decode scripts: Add decodetree.py 2018-02-22 15:44:07 -08:00
docker docker: Clean dangling tarball files 2018-09-10 11:50:06 +08:00
guest-debug python: futurize -f libfuturize.fixes.fix_print_with_import 2018-06-08 14:39:24 -03:00
hex-loader-check-data Add QTest testcase for the Intel Hexadecimal 2018-08-16 14:05:28 +01:00
image-fuzzer python: futurize -f lib2to3.fixes.fix_renames 2018-06-08 14:39:24 -03:00
keys tests: Add a test key pair 2017-09-22 10:46:25 +08:00
libqos tests/libqos: Utilize newer glib spawn check 2018-08-31 09:53:09 +02:00
migration tests/migration: Add migration-test header file 2018-09-26 13:20:36 +01:00
multiboot tests/multiboot: Add .gitignore 2018-03-21 15:13:40 +01:00
qapi-schema tests: add a qmp success-response test 2018-08-31 09:53:10 +02:00
qemu-iotests qcow2: Assign the L2 cache relatively to the image size 2018-10-01 12:51:12 +02:00
rocker
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tcg target/xtensa updates: 2018-09-25 11:05:56 +01:00
vm tests/vm: Use -cpu max rather than -cpu host 2018-09-26 10:46:28 +08:00
vmstate-static-checker-data
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.gitignore tests/.gitignore: don't ignore docker tests 2018-07-24 11:45:25 +01:00
Makefile.include Revert "check: Move VMXNET3 test to common" 2018-09-25 17:26:18 +02:00
ac97-test.c
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acpi-utils.c
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acpi-utils.h maint: Fix macros with broken 'do/while(0); ' usage 2018-01-16 14:54:52 +01:00
ahci-test.c Testing patches for 2018-08-16 2018-08-16 09:50:54 +01:00
atomic_add-bench.c tests/atomic_add-bench: add -p to enable sync profiler 2018-08-23 18:46:25 +02:00
benchmark-crypto-cipher.c tests/crypto: Use the IEC binary prefix definitions 2018-07-02 15:41:17 +02:00
benchmark-crypto-hash.c tests/crypto: Use the IEC binary prefix definitions 2018-07-02 15:41:17 +02:00
benchmark-crypto-hmac.c tests/crypto: Use the IEC binary prefix definitions 2018-07-02 15:41:17 +02:00
bios-tables-test.c nvdimm: make persistence option symbolic 2018-06-11 22:19:57 +03:00
boot-order-test.c fw_cfg: import & use linux/qemu_fw_cfg.h 2018-08-23 18:46:25 +02:00
boot-sector.c tests/boot-sector: Add magic bytes to s390x boot code header 2018-06-08 13:17:39 -04:00
boot-sector.h tests/boot-sector: Drop dependence on global_qtest 2018-02-14 11:43:41 +01:00
boot-serial-test.c hw/ppc: on 40p machine, change default firmware to OpenBIOS 2018-09-25 11:12:25 +10:00
cdrom-test.c libqtest: Replace qtest_startf() by qtest_initf() 2018-08-16 08:42:06 +02:00
check-block-qdict.c tests: fix crumple/recursive leak 2018-08-15 08:12:19 +02:00
check-block.sh
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check-qdict.c qobject: Move block-specific qdict code to block-qdict.c 2018-06-15 14:49:44 +02:00
check-qjson.c json: Support %% in JSON strings when interpolating 2018-08-24 20:26:37 +02:00
check-qlist.c qobject: Replace qobject_incref/QINCREF qobject_decref/QDECREF 2018-05-04 08:27:53 +02:00
check-qlit.c qobject: Replace qobject_incref/QINCREF qobject_decref/QDECREF 2018-05-04 08:27:53 +02:00
check-qnull.c qobject: Replace qobject_incref/QINCREF qobject_decref/QDECREF 2018-05-04 08:27:53 +02:00
check-qnum.c qobject: Replace qobject_incref/QINCREF qobject_decref/QDECREF 2018-05-04 08:27:53 +02:00
check-qobject.c qstring: Move qstring_from_substr()'s @end one to the right 2018-07-28 09:09:58 +02:00
check-qom-interface.c
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check-qom-proplist.c
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check-qstring.c qstring: Move qstring_from_substr()'s @end one to the right 2018-07-28 09:09:58 +02:00
cpu-plug-test.c tests: Skip old versioned machine types in quick testing mode 2018-08-23 18:46:23 +02:00
crypto-tls-psk-helpers.c crypto: Implement TLS Pre-Shared Keys (PSK). 2018-07-03 13:04:38 +01:00
crypto-tls-psk-helpers.h crypto: Implement TLS Pre-Shared Keys (PSK). 2018-07-03 13:04:38 +01:00
crypto-tls-x509-helpers.c tests: call qcrypto_init instead of gnutls_global_init 2018-07-24 17:33:39 +01:00
crypto-tls-x509-helpers.h
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device-introspect-test.c tests/device-introspect: Test with all machines, not only with "none" 2018-08-23 18:46:25 +02:00
display-vga-test.c
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drive_del-test.c tests: add qmp_assert_error_class() 2018-08-31 09:53:10 +02:00
ds1338-test.c libqos: Use explicit QTestState for i2c operations 2018-02-14 11:43:41 +01:00
e1000-test.c
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e1000e-test.c tests: Clean up string interpolation around qtest_qmp_device_add() 2018-08-16 08:42:06 +02:00
eepro100-test.c
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endianness-test.c libqtest: Replace qtest_startf() by qtest_initf() 2018-08-16 08:42:06 +02:00
es1370-test.c
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fdc-test.c libqtest: Remove qtest_qmp_discard_response() & friends 2018-08-16 08:42:06 +02:00
fw_cfg-test.c fw_cfg: import & use linux/qemu_fw_cfg.h 2018-08-23 18:46:25 +02:00
hd-geo-test.c block: Remove deprecated -drive geometry options 2018-08-15 12:50:39 +02:00
hexloader-test.c Add QTest testcase for the Intel Hexadecimal 2018-08-16 14:05:28 +01:00
i440fx-test.c libqos: Track QTestState with QPCIBus 2018-02-14 11:43:02 +01:00
i82801b11-test.c
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ide-test.c Testing patches for 2018-08-16 2018-08-16 09:50:54 +01:00
intel-hda-test.c
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io-channel-helpers.c Include qapi/error.h exactly where needed 2018-02-09 13:50:17 +01:00
io-channel-helpers.h
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ioh3420-test.c
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iothread.c
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iothread.h
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ipmi-bt-test.c libqtest: Replace qtest_startf() by qtest_initf() 2018-08-16 08:42:06 +02:00
ipmi-kcs-test.c
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ipoctal232-test.c
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ivshmem-test.c tests: Clean up string interpolation around qtest_qmp_device_add() 2018-08-16 08:42:06 +02:00
libqtest.c tests: add qmp_assert_error_class() 2018-08-31 09:53:10 +02:00
libqtest.h tests: add qmp_assert_error_class() 2018-08-31 09:53:10 +02:00
m25p80-test.c libqtest: Replace qtest_startf() by qtest_initf() 2018-08-16 08:42:06 +02:00
m48t59-test.c libqtest: Replace qtest_startf() by qtest_initf() 2018-08-16 08:42:06 +02:00
machine-none-test.c ppc: Remove deprecated ppcemb target 2018-08-28 11:31:23 +10:00
megasas-test.c libqos: Use explicit QTestState for remaining libqos operations 2018-02-14 11:43:41 +01:00
migration-test.c tests/migration: Speed up the test on ppc64 2018-09-26 17:29:01 +01:00
ne2000-test.c
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numa-test.c libqtest: Replace qtest_startf() by qtest_initf() 2018-08-16 08:42:06 +02:00
nvme-test.c
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pca9552-test.c misc: add pca9552 LED blinker model 2018-06-08 13:15:32 +01:00
pcnet-test.c
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pkix_asn1_tab.c
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pnv-xscom-test.c libqtest: Replace qtest_startf() by qtest_initf() 2018-08-16 08:42:06 +02:00
prom-env-test.c libqtest: Replace qtest_startf() by qtest_initf() 2018-08-16 08:42:06 +02:00
ptimer-test-stubs.c ptimer-test: do not link to libqemustub.a/libqemuutil.a 2017-09-19 16:19:39 +02:00
ptimer-test.c ptimer: Add TRIGGER_ONLY_ON_DECREMENT policy option 2018-07-09 14:51:34 +01:00
ptimer-test.h
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pvpanic-test.c qobject: Replace qobject_incref/QINCREF qobject_decref/QDECREF 2018-05-04 08:27:53 +02:00
pxe-test.c tests/boot-sector: Drop dependence on global_qtest 2018-02-14 11:43:41 +01:00
q35-test.c qobject: Replace qobject_incref/QINCREF qobject_decref/QDECREF 2018-05-04 08:27:53 +02:00
qemu-iotests-quick.sh
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qht-bench.c qht-bench: add -p flag to precompute hash values 2018-09-26 08:55:54 -07:00
qmp-cmd-test.c tests: add qmp/object-add-without-props test 2018-08-31 09:53:10 +02:00
qmp-test.c json: Nicer recovery from lexical errors 2018-09-24 18:08:07 +02:00
qom-test.c tests: Skip old versioned machine types in quick testing mode 2018-08-23 18:46:23 +02:00
rcutorture.c rcutorture: remove synchronize_rcu from readers 2018-03-12 16:12:47 +01:00
rtas-test.c libqos: Use explicit QTestState for remaining libqos operations 2018-02-14 11:43:41 +01:00
rtc-test.c
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rtl8139-test.c libqos: Track QTestState with QPCIBus 2018-02-14 11:43:02 +01:00
sdhci-test.c libqtest: Replace qtest_startf() by qtest_initf() 2018-08-16 08:42:06 +02:00
socket-helpers.c sockets: strengthen test suite IP protocol availability checks 2018-03-13 18:06:06 +00:00
socket-helpers.h sockets: strengthen test suite IP protocol availability checks 2018-03-13 18:06:06 +00:00
spapr-phb-test.c
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tco-test.c libqtest: Replace qtest_startf() by qtest_initf() 2018-08-16 08:42:06 +02:00
test-aio-multithread.c Include qapi/error.h exactly where needed 2018-02-09 13:50:17 +01:00
test-aio.c coroutine: add test-aio coroutine queue chaining test case 2018-03-27 13:05:28 +01:00
test-arm-mptimer.c
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test-base64.c
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test-bdrv-drain.c test-bdrv-drain: Test draining job source child and parent 2018-09-25 15:50:15 +02:00
test-bitcnt.c
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test-bitops.c
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test-block-backend.c block: test blk_aio_flush() with blk->root == NULL 2018-03-02 18:39:07 +01:00
test-blockjob-txn.c tests/test-blockjob-txn: move .exit to .clean 2018-09-25 15:31:15 +02:00
test-blockjob.c test-blockjob: Acquire AioContext around job_cancel_sync() 2018-09-25 15:50:15 +02:00
test-bufferiszero.c
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test-char.c build-sys: remove glib_subprocess check 2018-08-23 18:46:25 +02:00
test-clone-visitor.c Eliminate qapi/qmp/types.h 2018-02-09 13:52:15 +01:00
test-coroutine.c lockable: add QemuLockable 2018-02-08 09:22:03 +08:00
test-crypto-afsplit.c
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test-crypto-block.c tests: Run the luks tests in test-crypto-block only if encryption is available 2017-11-08 11:03:46 +00:00
test-crypto-cipher.c
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test-crypto-hash.c
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test-crypto-hmac.c
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test-crypto-ivgen.c
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test-crypto-pbkdf.c
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test-crypto-secret.c
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test-crypto-tlscredsx509.c tests: use error_abort in places expecting errors 2018-07-24 17:35:57 +01:00
test-crypto-tlssession.c tests: fix TLS handshake failure with TLS 1.3 2018-07-24 17:36:12 +01:00
test-crypto-xts.c
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test-cutils.c hw: Use IEC binary prefix definitions from "qemu/units.h" 2018-07-02 15:41:10 +02:00
test-filter-mirror.c libqtest: Replace qtest_startf() by qtest_initf() 2018-08-16 08:42:06 +02:00
test-filter-redirector.c libqtest: Replace qtest_startf() by qtest_initf() 2018-08-16 08:42:06 +02:00
test-hbitmap.c test-hbitmap: Add non-advancing iter_next tests 2018-06-18 17:04:56 +02:00
test-hmp.c tests: Skip old versioned machine types in quick testing mode 2018-08-23 18:46:23 +02:00
test-int128.c
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test-io-channel-buffer.c
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test-io-channel-command.c
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test-io-channel-file.c io: Fix QIOChannelFile when creating and opening read-write 2018-02-15 16:54:57 +00:00
test-io-channel-socket.c sockets: pull code for testing IP availability out of specific test 2018-03-13 18:06:06 +00:00
test-io-channel-tls.c tests: use error_abort in places expecting errors 2018-07-24 17:35:57 +01:00
test-io-task.c qio: non-default context for threaded qtask 2018-03-06 10:19:05 +00:00
test-iov.c
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test-keyval.c hw: Use IEC binary prefix definitions from "qemu/units.h" 2018-07-02 15:41:10 +02:00
test-logging.c
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test-mul64.c
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test-netfilter.c qobject: Replace qobject_incref/QINCREF qobject_decref/QDECREF 2018-05-04 08:27:53 +02:00
test-opts-visitor.c
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test-qapi-util.c Drop superfluous includes of qapi-types.h and test-qapi-types.h 2018-02-09 05:05:11 +01:00
test-qdev-global-props.c
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test-qdist.c
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test-qemu-opts.c hw: Use IEC binary prefix definitions from "qemu/units.h" 2018-07-02 15:41:10 +02:00
test-qga.c tests: add qmp_assert_error_class() 2018-08-31 09:53:10 +02:00
test-qht-par.c
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test-qht.c qht: drop ht argument from qht iterators 2018-09-26 08:55:54 -07:00
test-qmp-cmds.c tests: add a qmp success-response test 2018-08-31 09:53:10 +02:00
test-qmp-event.c qapi: Drop qapi_event_send_FOO()'s Error ** argument 2018-08-28 18:21:38 +02:00
test-qobject-input-visitor.c test-qobject-input-visitor: Avoid format string ambiguity 2018-08-16 08:42:06 +02:00
test-qobject-output-visitor.c qobject: Replace qobject_incref/QINCREF qobject_decref/QDECREF 2018-05-04 08:27:53 +02:00
test-rcu-list.c tests: add test-rcu-tailq 2018-08-23 18:46:25 +02:00
test-rcu-simpleq.c tests: add test-list-simpleq 2018-08-23 18:46:25 +02:00
test-rcu-tailq.c tests: add test-rcu-tailq 2018-08-23 18:46:25 +02:00
test-replication.c block: Add block-specific QDict header 2018-06-15 14:49:44 +02:00
test-shift128.c
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test-string-input-visitor.c Eliminate qapi/qmp/types.h 2018-02-09 13:52:15 +01:00
test-string-output-visitor.c tests/qapi: use ARRAY_SIZE macro 2018-02-10 10:45:14 +03:00
test-thread-pool.c Remove unnecessary variables for function return value 2018-05-20 08:48:13 +03:00
test-throttle.c
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test-timed-average.c
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test-util-sockets.c monitor: Fix unsafe sharing of @cur_mon among threads 2018-07-23 14:00:03 +02:00
test-uuid.c util: add is_equal to UUID API 2017-12-20 22:01:24 +08:00
test-visitor-serialization.c qobject: Replace qobject_incref/QINCREF qobject_decref/QDECREF 2018-05-04 08:27:53 +02:00
test-vmstate.c tests: don't silence error reporting for all tests 2018-07-24 17:35:23 +01:00
test-write-threshold.c
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test-x86-cpuid-compat.c build-sys: remove glib_subprocess check 2018-08-23 18:46:25 +02:00
test-x86-cpuid.c
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test-xbzrle.c
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tmp105-test.c misc: add pca9552 LED blinker model 2018-06-08 13:15:32 +01:00
tpci200-test.c
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tpm-crb-swtpm-test.c test: Pass TPM interface model to functions creating command line 2018-06-06 15:44:07 -04:00
tpm-crb-test.c tests: Fix signalling race condition in TPM tests 2018-09-07 16:37:47 -04:00
tpm-emu.c tests: Fix signalling race condition in TPM tests 2018-09-07 16:37:47 -04:00
tpm-emu.h tests: Fix signalling race condition in TPM tests 2018-09-07 16:37:47 -04:00
tpm-tests.c test: Pass TPM interface model to functions creating command line 2018-06-06 15:44:07 -04:00
tpm-tests.h test: Pass TPM interface model to functions creating command line 2018-06-06 15:44:07 -04:00
tpm-tis-swtpm-test.c test: Add swtpm migration test for the TPM TIS interface 2018-06-06 15:44:12 -04:00
tpm-tis-test.c tests: Fix signalling race condition in TPM tests 2018-09-07 16:37:47 -04:00
tpm-util.c tests: New helper qtest_qmp_receive_success() 2018-08-16 08:42:06 +02:00
tpm-util.h test: Add swtpm migration test for the TPM TIS interface 2018-06-06 15:44:12 -04:00
usb-hcd-ehci-test.c tests: Clean up string interpolation around qtest_qmp_device_add() 2018-08-16 08:42:06 +02:00
usb-hcd-ohci-test.c tests: Clean up string interpolation around qtest_qmp_device_add() 2018-08-16 08:42:06 +02:00
usb-hcd-uhci-test.c tests: Clean up string interpolation around qtest_qmp_device_add() 2018-08-16 08:42:06 +02:00
usb-hcd-xhci-test.c tests: Clean up string interpolation around qtest_qmp_device_add() 2018-08-16 08:42:06 +02:00
vhost-user-bridge.c vhost-user-bridge: support host notifier 2018-05-24 21:14:11 +03:00
vhost-user-test.c build-sys: remove glib_subprocess check 2018-08-23 18:46:25 +02:00
virtio-9p-test.c libqos: Use explicit QTestState for remaining libqos operations 2018-02-14 11:43:41 +01:00
virtio-balloon-test.c libqtest: Replace qtest_startf() by qtest_initf() 2018-08-16 08:42:06 +02:00
virtio-blk-test.c libqtest: Replace qtest_startf() by qtest_initf() 2018-08-16 08:42:06 +02:00
virtio-ccw-test.c tests: virtio: separate ccw tests from libqos 2018-08-23 13:32:50 +02:00
virtio-console-test.c libqtest: Replace qtest_startf() by qtest_initf() 2018-08-16 08:42:06 +02:00
virtio-net-test.c tests: Clean up string interpolation around qtest_qmp_device_add() 2018-08-16 08:42:06 +02:00
virtio-rng-test.c tests: Clean up string interpolation around qtest_qmp_device_add() 2018-08-16 08:42:06 +02:00
virtio-scsi-test.c tests: Clean up string interpolation around qtest_qmp_device_add() 2018-08-16 08:42:06 +02:00
virtio-serial-test.c libqtest: Replace qtest_startf() by qtest_initf() 2018-08-16 08:42:06 +02:00
vmgenid-test.c libqtest: Replace qtest_startf() by qtest_initf() 2018-08-16 08:42:06 +02:00
vmxnet3-test.c
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wdt_ib700-test.c qobject: Replace qobject_incref/QINCREF qobject_decref/QDECREF 2018-05-04 08:27:53 +02:00