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Sam Li e2848bc574 Use io_uring_register_ring_fd() to skip fd operations 
Linux recently added a new io_uring(7) optimization API that QEMU
doesn't take advantage of yet. The liburing library that QEMU uses
has added a corresponding new API calling io_uring_register_ring_fd().
When this API is called after creating the ring, the io_uring_submit()
library function passes a flag to the io_uring_enter(2) syscall
allowing it to skip the ring file descriptor fdget()/fdput()
operations. This saves some CPU cycles.

Signed-off-by: Sam Li <faithilikerun@gmail.com>
Message-id: 20220531105011.111082-1-faithilikerun@gmail.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2022-06-15 14:50:41 +01:00
..
export
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
monitor
qapi: rename BlockDirtyBitmapMergeSource to BlockDirtyBitmapOrStr
2022-04-26 13:13:50 -05:00
accounting.c
…
aio_task.c
block/aio_task: assert max_busy_tasks is greater than 0
2021-10-05 18:56:41 +02:00
amend.c
block/amend: Keep strong reference to BDS
2022-03-04 18:18:26 +01:00
backup.c
assertions for block_int global state API
2022-03-04 18:18:25 +01:00
blkdebug.c
block: use int64_t instead of int in driver discard handlers
2021-09-29 13:46:32 -05:00
blklogwrites.c
block: use int64_t instead of int in driver discard handlers
2021-09-29 13:46:32 -05:00
blkreplay.c
block: use int64_t instead of int in driver discard handlers
2021-09-29 13:46:32 -05:00
blkverify.c
Replace GCC_FMT_ATTR with G_GNUC_PRINTF
2022-03-22 14:40:51 +04:00
block-backend.c
block/coroutines: I/O and "I/O or GS" API
2022-03-04 18:18:25 +01:00
block-copy.c
target-arm queue:
2022-03-08 15:26:10 +00:00
block-gen.h
…
bochs.c
block: use int64_t instead of uint64_t in driver read handlers
2021-09-29 13:46:31 -05:00
cloop.c
block: use int64_t instead of uint64_t in driver read handlers
2021-09-29 13:46:31 -05:00
commit.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
copy-before-write.c
block: copy-before-write: realize snapshot-access API
2022-03-07 09:33:31 +01:00
copy-before-write.h
block/copy-before-write.h: global state API + assertions
2022-03-04 18:18:25 +01:00
copy-on-read.c
block: use int64_t instead of int in driver discard handlers
2021-09-29 13:46:32 -05:00
copy-on-read.h
Clean up ill-advised or unusual header guards
2022-05-11 16:50:01 +02:00
coroutines.h
Clean up header guards that don't match their file name
2022-05-11 16:49:06 +02:00
create.c
block_int-common.h: assertions in the callers of BlockDriver function pointers
2022-03-04 18:18:25 +01:00
crypto.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
crypto.h
…
curl.c
block/curl.c: Check error return from curl_easy_setopt()
2022-03-07 09:19:20 +01:00
dirty-bitmap.c
block/dirty-bitmap: introduce bdrv_dirty_bitmap_status()
2022-03-07 09:33:30 +01:00
dmg-bz2.c
…
dmg-lzfse.c
…
dmg.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
dmg.h
…
file-posix.c
block: move fcntl_setfl()
2022-05-03 15:17:53 +04:00
file-win32.c
block: use int64_t instead of uint64_t in driver write handlers
2021-09-29 13:46:31 -05:00
filter-compress.c
block: use int64_t instead of int in driver discard handlers
2021-09-29 13:46:32 -05:00
gluster.c
block: use int64_t instead of int in driver discard handlers
2021-09-29 13:46:32 -05:00
io_uring.c
Use io_uring_register_ring_fd() to skip fd operations
2022-06-15 14:50:41 +01:00
io.c
coroutine-lock: qemu_co_queue_restart_all is a coroutine-only qemu_co_enter_all
2022-05-12 12:29:44 +02:00
iscsi-opts.c
modules: add block module annotations
2021-07-09 18:20:27 +02:00
iscsi.c
include: move qemu_get_vm_name() to sysemu.h
2022-04-06 14:31:43 +02:00
linux-aio.c
aio-posix: split poll check from ready handler
2022-01-12 17:09:39 +00:00
meson.build
block: introduce snapshot-access block driver
2022-03-07 09:33:31 +01:00
mirror.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
nbd.c
nbd: document what is protected by the CoMutexes
2022-04-26 13:16:42 -05:00
nfs.c
aio-posix: split poll check from ready handler
2022-01-12 17:09:39 +00:00
null.c
block: use int64_t instead of uint64_t in driver write handlers
2021-09-29 13:46:31 -05:00
nvme.c
Replace qemu_real_host_page variables with inlined functions
2022-04-06 10:50:38 +02:00
parallels-ext.c
block: Fix misleading hexadecimal format
2022-03-24 10:38:42 +00:00
parallels.c
Replace qemu_real_host_page variables with inlined functions
2022-04-06 10:50:38 +02:00
parallels.h
…
preallocate.c
block: fix preallocate filter: don't do unaligned preallocate requests
2022-03-07 09:19:20 +01:00
progress_meter.c
…
qapi-sysemu.c
block: add 'force' parameter to 'blockdev-change-medium' command
2022-04-25 12:02:36 +02:00
qapi.c
…
qcow2-bitmap.c
…
qcow2-cache.c
Replace qemu_real_host_page variables with inlined functions
2022-04-06 10:50:38 +02:00
qcow2-cluster.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
qcow2-refcount.c
qcow2: Add errp to rebuild_refcount_structure()
2022-04-20 12:09:17 +02:00
qcow2-snapshot.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
qcow2-threads.c
…
qcow2.c
qcow2: Do not reopen data_file in invalidate_cache
2022-05-04 15:55:23 +02:00
qcow2.h
Replace GCC_FMT_ATTR with G_GNUC_PRINTF
2022-03-22 14:40:51 +04:00
qcow.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
qed-check.c
…
qed-cluster.c
…
qed-l2-cache.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
qed-table.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
qed.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
qed.h
…
quorum.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
raw-format.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
rbd.c
block/rbd: fix write zeroes with growing images
2022-03-22 09:40:54 +01:00
replication.c
job: @force parameter for job_cancel_sync()
2021-10-07 10:42:09 +02:00
reqlist.c
block/reqlist: add reqlist_wait_all()
2022-03-07 09:33:30 +01:00
snapshot-access.c
block: introduce snapshot-access block driver
2022-03-07 09:33:31 +01:00
snapshot.c
include/block/snapshot: global state API + assertions
2022-03-04 18:18:25 +01:00
ssh.c
Replace GCC_FMT_ATTR with G_GNUC_PRINTF
2022-03-22 14:40:51 +04:00
stream.c
block/stream: Drain subtree around graph change
2022-03-29 16:30:55 +02:00
throttle-groups.c
…
throttle.c
block: use int64_t instead of int in driver discard handlers
2021-09-29 13:46:32 -05:00
trace-events
block/nvme: Display CQ/SQ pointer in nvme_free_queue_pair()
2021-11-02 15:49:12 +01:00
trace.h
…
vdi.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
vhdx-endian.c
…
vhdx-log.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
vhdx.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
vhdx.h
…
vmdk.c
block/vmdk: Fix reopening bs->file
2022-05-04 15:55:23 +02:00
vpc.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
vvfat.c
vvfat: Fix vvfat_write() for writes before the root directory
2022-01-14 12:03:16 +01:00
win32-aio.c
osdep: Move memalign-related functions to their own header
2022-03-07 13:16:49 +00:00
write-threshold.c
…