haraldwolff/qemu-patch-raspberry4
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qemu-patch-raspberry4/block
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Alberto Garcia 5d8e4ca035 throttle-groups: Skip the round-robin if a member is being drained 
In the throttling code after an I/O request has been completed the
next one is selected from a different member using a round-robin
algorithm. This ensures that all members get a chance to finish their
pending I/O requests.

However, if a group member has its I/O limits disabled (because it's
being drained) then we should always give it priority in order to have
all its pending requests finished as soon as possible.

If we don't do this we could have a member in the process of being
drained waiting for the throttled requests of other members, for which
the I/O limits still apply.

This can have additional consequences: if we're running in qtest mode
(with QEMU_CLOCK_VIRTUAL) then timers can only fire if we advance the
clock manually, so attempting to drain a block device can hang QEMU in
the BDRV_POLL_WHILE() loop at the end of bdrv_do_drained_begin().

Signed-off-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-08-15 12:50:39 +02:00
..
accounting.c block/accounting: introduce latency histogram 2018-03-19 14:58:37 -05:00
backup.c block: Fix typos in comments (found by codespell) 2018-07-23 16:50:43 +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 block: Use BdrvChild to discard 2018-07-10 16:01:52 +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 BdrvChild to discard 2018-07-10 16:01:52 +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 job: Add error message for failing jobs 2018-05-30 13:31:01 +02:00
copy-on-read.c block: Use BdrvChild to discard 2018-07-10 16:01:52 +02:00
create.c block/create: Mark blockdev-create stable 2018-05-30 13:31:18 +02:00
crypto.c block/crypto: Fix memory leak in create error path 2018-07-05 10:29:19 +02:00
crypto.h block/crypto: Simplify block_crypto_{open,create}_opts_init() 2018-06-29 14:20:56 +02:00
curl.c block: Fix typos in comments (found by codespell) 2018-07-23 16:50:43 +02:00
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: Fix write_zeroes with unmap on block devices 2018-07-30 15:35:37 +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 common write req handling in truncate 2018-07-10 16:46:22 +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 linux-aio: properly bubble up errors from initialization 2018-06-27 13:06:34 +01:00
Makefile.objs block: Add blklogwrites 2018-07-05 10:29:19 +02:00
mirror.c block: Use BdrvChild to discard 2018-07-10 16:01:52 +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 null: Switch to byte-based read/write 2018-05-15 16:11:41 +02:00
nvme.c qobject: Modify qobject_ref() to return obj 2018-05-04 08:27:53 +02:00
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: A grammar fix in conflicting cache sizing error message 2018-07-30 15:35:37 +02:00
qcow2.h qcow2: add overlap check for bitmap directory 2018-07-09 19:43:24 +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 block: Add block-specific QDict header 2018-06-15 14:49:44 +02:00
raw-format.c Block layer patches: 2018-07-10 17:28:29 +01:00
rbd.c block: Convert .bdrv_truncate callback to coroutine_fn 2018-06-29 14:20:56 +02:00
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: Add block-specific QDict header 2018-06-15 14:49:44 +02:00
ssh.c block: Convert .bdrv_truncate callback to coroutine_fn 2018-06-29 14:20:56 +02:00
stream.c job: Add error message for failing jobs 2018-05-30 13:31:01 +02:00
throttle-groups.c throttle-groups: Skip the round-robin if a member is being drained 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: Fix possible segfault with non-VMDK backing 2018-07-09 19:43:24 +02:00
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 Include less of the generated modular QAPI headers 2018-03-02 13:45:50 -06:00