Hi Linus,
Not quite as small this week as I had hoped, but at least this should be
the end of it. All the little known issues have been ironed out - most
of it little stuff, but cancelations being the bigger part. Only minor
tweaks and/or regular fixes expected beyond this point.
- Fix the creds tracking for async (io-wq and SQPOLL)
- Various SQPOLL fixes related to parking, sharing, forking, IOPOLL,
completions, and life times. Much simpler now.
- Make IO threads unfreezable by default, on account of a bug report
that had them spinning on resume. Honestly not quite sure why thawing
leaves us with a perpetual signal pending (causing the spin), but for
now make them unfreezable like there were in 5.11 and prior.
- Move personality_idr to xarray, solving a use-after-free related to
removing an entry from the iterator callback. Buffer idr needs the
same treatment.
- Re-org around and task vs context tracking, enabling the fixing of
cancelations, and then cancelation fixes on top.
- Various little bits of cleanups and hardening, and removal of now dead
parts.
Please pull!
The following changes since commit a38fd8748464831584a19438cbb3082b5a2dab15:
Linux 5.12-rc2 (2021-03-05 17:33:41 -0800)
are available in the Git repository at:
git://git.kernel.dk/linux-block.git tags/io_uring-5.12-2021-03-12
for you to fetch changes up to 58f99373834151e1ca7edc49bc5578d9d40db099:
io_uring: fix OP_ASYNC_CANCEL across tasks (2021-03-12 09:42:56 -0700)
----------------------------------------------------------------
io_uring-5.12-2021-03-12
----------------------------------------------------------------
Jens Axboe (9):
io-wq: fix race in freeing 'wq' and worker access
io-wq: always track creds for async issue
io_uring: SQPOLL parking fixes
io-wq: remove unused 'user' member of io_wq
io_uring: move all io_kiocb init early in io_init_req()
io_uring: always wait for sqd exited when stopping SQPOLL thread
kernel: make IO threads unfreezable by default
io_uring: force creation of separate context for ATTACH_WQ and non-threads
io_uring: perform IOPOLL reaping if canceler is thread itself
Matthew Wilcox (Oracle) (1):
io_uring: Convert personality_idr to XArray
Pavel Begunkov (20):
io_uring: make del_task_file more forgiving
io_uring: introduce ctx to tctx back map
io_uring: do ctx initiated file note removal
io_uring: don't take task ring-file notes
io_uring: index io_uring->xa by ctx not file
io_uring: warn when ring exit takes too long
io_uring: cancel reqs of all iowq's on ring exit
io-wq: warn on creating manager while exiting
io_uring: fix unrelated ctx reqs cancellation
io_uring: clean R_DISABLED startup mess
io_uring: fix io_sq_offload_create error handling
io_uring: add io_disarm_next() helper
io_uring: fix complete_post races for linked req
io_uring: fix invalid ctx->sq_thread_idle
io_uring: remove indirect ctx into sqo injection
io_uring: cancel deferred requests in try_cancel
io_uring: remove useless ->startup completion
io_uring: prevent racy sqd->thread checks
io_uring: cancel sqpoll via task_work
io_uring: fix OP_ASYNC_CANCEL across tasks
Stefan Metzmacher (2):
io_uring: run __io_sq_thread() with the initial creds from io_uring_setup()
io_uring: kill io_sq_thread_fork() and return -EOWNERDEAD if the sq_thread is gone
Yang Li (1):
io_uring: remove unneeded variable 'ret'
yangerkun (1):
io-wq: fix ref leak for req in case of exit cancelations
fs/io-wq.c | 25 +-
fs/io-wq.h | 2 +-
fs/io_uring.c | 837 ++++++++++++++++++++++++++---------------------
include/linux/io_uring.h | 2 +-
kernel/fork.c | 1 +
5 files changed, 470 insertions(+), 397 deletions(-)
--
Jens Axboe
