haraldwolff/qemu-patch-raspberry4
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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
..
accounting.c block/accounting: introduce latency histogram 2018-03-19 14:58:37 -05:00
backup.c block/backup: make function variables consistently named 2018-08-31 16:28:33 +02:00
blkdebug.c qstring: Move qstring_from_substr()'s @end one to the right 2018-07-28 09:09:58 +02:00
blklogwrites.c block: Use BdrvChild to discard 2018-07-10 16:01:52 +02:00
blkreplay.c trivial: Make bios files and source files non-executable 2018-09-25 17:26:18 +02:00
blkverify.c qstring: Move qstring_from_substr()'s @end one to the right 2018-07-28 09:09:58 +02:00
block-backend.c block: Use a single global AioWait 2018-09-25 15:50:15 +02:00
bochs.c block: Deprecate bdrv_set_read_only() and users 2017-11-17 13:35:59 +01:00
cloop.c block: Deprecate bdrv_set_read_only() and users 2017-11-17 13:35:59 +01:00
commit.c block/commit: refactor commit to use job callbacks 2018-09-25 15:31:15 +02:00
copy-on-read.c block: drop empty .bdrv_close handlers 2018-08-15 12:50:39 +02:00
create.c jobs: utilize job_exit shim 2018-08-31 16:28:33 +02:00
crypto.c luks: Allow share-rw=on 2018-08-15 12:50:39 +02:00
crypto.h block/crypto: Simplify block_crypto_{open,create}_opts_init() 2018-06-29 14:20:56 +02:00
curl.c curl: Make sslverify=off disable host as well as peer verification. 2018-09-24 23:46:05 -04:00
dirty-bitmap.c dirty-bitmap: fix double lock on bitmap enabling 2018-07-04 02:12:49 -04:00
dmg-bz2.c dmg: Move libbz2 code to dmg-bz2.so 2016-10-07 14:14:06 +02:00
dmg.c block: Deprecate bdrv_set_read_only() and users 2017-11-17 13:35:59 +01:00
dmg.h block: remove "qemu/osdep.h" from header file 2017-12-18 17:07:02 +03:00
file-posix.c file-posix: Forbid trying to change unsupported options during reopen 2018-10-01 12:51:12 +02:00
file-win32.c block: Prefix file driver trace points with "file_" 2018-07-10 16:01:51 +02:00
gluster.c block: Fix typos in comments (found by codespell) 2018-07-23 16:50:43 +02:00
io.c block: Use a single global AioWait 2018-09-25 15:50:15 +02:00
iscsi-opts.c Move include qemu/option.h from qemu-common.h to actual users 2018-02-09 13:52:16 +01:00
iscsi.c block: Add copy offloading trace points 2018-07-10 16:01:52 +02:00
linux-aio.c block/linux-aio: acquire AioContext before qemu_laio_process_completions 2018-09-25 15:50:15 +02:00
Makefile.objs block: Add blklogwrites 2018-07-05 10:29:19 +02:00
mirror.c block/mirror: conservative mirror_exit refactor 2018-09-25 15:31:15 +02:00
nbd-client.c nbd/client: Add x-dirty-bitmap to query bitmap from server 2018-07-02 15:27:38 -05:00
nbd-client.h nbd/client: Add x-dirty-bitmap to query bitmap from server 2018-07-02 15:27:38 -05:00
nbd.c qstring: Move qstring_from_substr()'s @end one to the right 2018-07-28 09:09:58 +02:00
nfs.c block: Convert .bdrv_truncate callback to coroutine_fn 2018-06-29 14:20:56 +02:00
null.c block: drop empty .bdrv_close handlers 2018-08-15 12:50:39 +02:00
nvme.c nvme: simplify plug/unplug 2018-08-15 10:12:35 +08:00
parallels.c parallels: Switch to byte-based calls 2018-06-29 14:20:56 +02:00
parallels.h Clean up includes 2018-02-09 05:05:11 +01:00
qapi.c block/qapi: Fix memory leak in qmp_query_blockstats() 2018-08-15 12:50:39 +02:00
qcow.c qcow: fix a reference leak 2018-07-30 15:35:37 +02:00
qcow2-bitmap.c qcow2: add overlap check for bitmap directory 2018-07-09 19:43:24 +02:00
qcow2-cache.c qcow2: Allow configuring the L2 slice size 2018-02-13 17:00:00 +01:00
qcow2-cluster.c qcow2: Free allocated clusters on write error 2018-06-29 14:20:56 +02:00
qcow2-refcount.c Block layer patches: 2018-07-10 17:28:29 +01:00
qcow2-snapshot.c block: use local path for local headers 2018-05-31 04:16:06 +03:00
qcow2.c qcow2: Assign the L2 cache relatively to the image size 2018-10-01 12:51:12 +02:00
qcow2.h qcow2: Assign the L2 cache relatively to the image size 2018-10-01 12:51:12 +02:00
qed-check.c block: convert bdrv_check callback to coroutine_fn 2018-03-09 15:17:47 +01:00
qed-cluster.c qed: protect table cache with CoMutex 2017-07-17 11:34:11 +08:00
qed-l2-cache.c qed: protect table cache with CoMutex 2017-07-17 11:34:11 +08:00
qed-table.c block: convert bdrv_check callback to coroutine_fn 2018-03-09 15:17:47 +01:00
qed.c block: Convert .bdrv_truncate callback to coroutine_fn 2018-06-29 14:20:56 +02:00
qed.h qed: protect table cache with CoMutex 2017-07-17 11:34:11 +08:00
quorum.c qapi: Drop qapi_event_send_FOO()'s Error ** argument 2018-08-28 18:21:38 +02:00
raw-format.c block: drop empty .bdrv_close handlers 2018-08-15 12:50:39 +02:00
rbd.c block/rbd: Attempt to parse legacy filenames 2018-09-24 23:46:05 -04:00
replication.c replication: Switch to byte-based calls 2018-06-29 14:20:56 +02:00
sheepdog.c block: Convert .bdrv_truncate callback to coroutine_fn 2018-06-29 14:20:56 +02:00
snapshot.c block: make .bdrv_close optional 2018-08-15 12:50:39 +02:00
ssh.c block: Convert .bdrv_truncate callback to coroutine_fn 2018-06-29 14:20:56 +02:00
stream.c block/stream: refactor stream to use job callbacks 2018-09-25 15:31:15 +02:00
throttle-groups.c throttle-groups: Don't allow timers without throttled requests 2018-08-15 12:50:39 +02:00
throttle.c block: Use BdrvChild to discard 2018-07-10 16:01:52 +02:00
trace-events block: Add copy offloading trace points 2018-07-10 16:01:52 +02:00
vdi.c vdi: Use definitions from "qemu/units.h" 2018-07-02 14:45:23 +02:00
vhdx-endian.c block: use local path for local headers 2018-05-31 04:16:06 +03:00
vhdx-log.c block: use local path for local headers 2018-05-31 04:16:06 +03:00
vhdx.c block: Fix typos in comments (found by codespell) 2018-07-23 16:50:43 +02:00
vhdx.h block: vhdx - update PAYLOAD_BLOCK_UNMAPPED value to match 1.00 spec 2014-12-12 15:42:22 +00:00
vmdk.c vmdk: align end of file to a sector boundary 2018-09-26 10:47:18 +08:00
vpc.c block: Factor out qobject_input_visitor_new_flat_confused() 2018-06-15 14:49:44 +02:00
vvfat.c block/vvfat: Disable debug message by default 2018-07-23 16:50:43 +02:00
vxhs.c block: Add block-specific QDict header 2018-06-15 14:49:44 +02:00
win32-aio.c file-win32: Switch to byte-based callbacks 2018-05-15 16:11:41 +02:00
write-threshold.c qapi: Drop qapi_event_send_FOO()'s Error ** argument 2018-08-28 18:21:38 +02:00