Stefan Hajnoczi be6a166fde block/io_uring: clarify that short reads can happen ...

Jens Axboe has confirmed that short reads are rare but can happen:
https://lore.kernel.org/io-uring/YsU%2FCGkl9ZXUI+Tj@stefanha-x1.localdomain/T/#m729963dc577d709b709c191922e98ec79d7eef54

The luring_resubmit_short_read() comment claimed they were only due to a
specific io_uring bug that was fixed in Linux commit 9d93a3f5a0c
("io_uring: punt short reads to async context"), which is wrong.
Dominique Martinet found that a btrfs bug also causes short reads. There
may be more kernel code paths that result in short reads.

Let's consider short reads fair game.

Cc: Dominique Martinet <dominique.martinet@atmark-techno.com>
Based-on: <20220630010137.2518851-1-dominique.martinet@atmark-techno.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Message-id: 20220706080341.1206476-1-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

2022-07-07 09:04:15 +01:00

..

export

vduse-blk: Add name option

2022-06-24 17:07:06 +02:00

monitor

block: improve block_dirty_bitmap_merge(): don't allocate extra bitmap

2022-06-24 17:07:06 +02:00

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

block: simplify handling of try to merge different sized bitmaps

2022-06-24 17:07:06 +02:00

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: Support passing NULL ops to blk_set_dev_ops()

2022-06-24 17:07:06 +02:00

block-copy.c

block/block-copy: block_copy(): add timeout_ns parameter

2022-06-29 10:56:12 +03:00

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: implement cbw-timeout option

2022-06-29 10:56:12 +03:00

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: simplify handling of try to merge different sized bitmaps

2022-06-24 17:07:06 +02:00

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/gluster: correctly set max_pdiscard

2022-06-24 17:07:06 +02:00

io_uring.c

block/io_uring: clarify that short reads can happen

2022-07-07 09:04:15 +01:00

io.c

block: drop unused bdrv_co_drain() API

2022-06-24 17:07:06 +02:00

iscsi-opts.c

…

iscsi.c

include: move qemu_get_vm_name() to sysemu.h

2022-04-06 14:31:43 +02:00

linux-aio.c

linux-aio: explain why max batch is checked in laio_io_unplug()

2022-06-15 16:43:42 +01:00

meson.build

block: introduce snapshot-access block driver

2022-03-07 09:33:31 +01:00

mirror.c

block: use 'unsigned' for in_flight field on driver state

2022-06-29 10:57:02 +03:00

nbd.c

block: use 'unsigned' for in_flight field on driver state

2022-06-29 10:57:02 +03:00

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: report a better error when namespace does not exist

2022-06-24 17:07:06 +02:00

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

nbd: trace long NBD operations

2022-06-29 10:57:02 +03:00

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

…