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Pavel Begunkov 0023527474 io_uring: don't wait when under-submitting 
[ Upstream commit 7c504e65206a4379ff38fe41d21b32b6c2c3e53e ]

There is no reliable way to submit and wait in a single syscall, as
io_submit_sqes() may under-consume sqes (in case of an early error).
Then it will wait for not-yet-submitted requests, deadlocking the user
in most cases.

Don't wait/poll if can't submit all sqes

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-01-12 12:21:38 +01:00
arch
perf/x86/intel: Fix PT PMI handling
2020-01-12 12:21:36 +01:00
block
block: end bio with BLK_STS_AGAIN in case of non-mq devs and REQ_NOWAIT
2020-01-12 12:21:37 +01:00
certs
PKCS#7: Refactor verify_pkcs7_signature()
2019-08-05 18:40:18 -04:00
crypto
KEYS: asymmetric: return ENOMEM if akcipher_request_alloc() fails
2019-12-31 16:46:07 +01:00
Documentation
dt-bindings: clock: renesas: rcar-usb2-clock-sel: Fix typo in example
2020-01-09 10:20:05 +01:00
drivers
iommu/dma: Relax locking in iommu_dma_prepare_msi()
2020-01-12 12:21:38 +01:00
fs
io_uring: don't wait when under-submitting
2020-01-12 12:21:38 +01:00
include
netfilter: uapi: Avoid undefined left-shift in xt_sctp.h
2020-01-12 12:21:17 +01:00
init
Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2019-09-28 08:14:15 -07:00
ipc
ipc/sem.c: convert to use built-in RCU list checking
2019-09-25 17:51:41 -07:00
kernel
psi: Fix a division error in psi poll()
2020-01-12 12:21:36 +01:00
lib
lib/ubsan: don't serialize UBSAN report
2020-01-09 10:20:07 +01:00
LICENSES
LICENSES: Rename other to deprecated
2019-05-03 06:34:32 -06:00
mm
mm/hugetlb: defer freeing of huge pages if in non-task context
2020-01-09 10:20:07 +01:00
net
rfkill: Fix incorrect check to avoid NULL pointer dereference
2020-01-12 12:21:33 +01:00
samples
samples: bpf: fix syscall_tp due to unused syscall
2020-01-12 12:21:26 +01:00
scripts
scripts: package: mkdebian: add missing rsync dependency
2020-01-12 12:21:35 +01:00
security
apparmor: fix aa_xattrs_match() may sleep while holding a RCU lock
2020-01-09 10:20:00 +01:00
sound
ASoC: wm8962: fix lambda value
2020-01-12 12:21:34 +01:00
tools
kselftest: Support old perl versions
2020-01-12 12:21:26 +01:00
usr
gen_initramfs_list.sh: fix 'bad variable name' error
2020-01-09 10:20:00 +01:00
virt
KVM: arm/arm64: Properly handle faulting of device mappings
2019-12-31 16:46:24 +01:00
.clang-format
clang-format: Update with the latest for_each macro list
2019-08-31 10:00:51 +02:00
.cocciconfig
…
.get_maintainer.ignore
Opt out of scripts/get_maintainer.pl
2019-05-16 10:53:40 -07:00
.gitattributes
.gitattributes: set git diff driver for C source code files
2016-10-07 18:46:30 -07:00
.gitignore
Modules updates for v5.4
2019-09-22 10:34:46 -07:00
.mailmap
ARM: SoC fixes
2019-11-10 13:41:59 -08:00
COPYING
COPYING: use the new text with points to the license files
2018-03-23 12:41:45 -06:00
CREDITS
MAINTAINERS: Remove Simon as Renesas SoC Co-Maintainer
2019-10-10 08:12:51 -07:00
Kbuild
kbuild: do not descend to ./Kbuild when cleaning
2019-08-21 21:03:58 +09:00
Kconfig
docs: kbuild: convert docs to ReST and rename to *.rst
2019-06-14 14:21:21 -06:00
MAINTAINERS
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2019-11-22 14:28:14 -08:00
Makefile
Linux 5.4.10
2020-01-09 10:25:53 +01:00
README
Drop all 00-INDEX files from Documentation/
2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.
Description
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