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Jens Axboe de0617e467 io_uring: add support for marking commands as draining 
There are no ordering constraints between the submission and completion
side of io_uring. But sometimes that would be useful to have. One common
example is doing an fsync, for instance, and have it ordered with
previous writes. Without support for that, the application must do this
tracking itself.

This adds a general SQE flag, IOSQE_IO_DRAIN. If a command is marked
with this flag, then it will not be issued before previous commands have
completed, and subsequent commands submitted after the drain will not be
issued before the drain is started.. If there are no pending commands,
setting this flag will not change the behavior of the issue of the
command.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-05-02 14:08:53 -06:00
arch Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-05-02 11:03:34 -07:00
block
certs
crypto crypto: lrw - Fix atomic sleep when walking skcipher 2019-04-18 22:13:46 +08:00
Documentation Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-05-02 11:03:34 -07:00
drivers Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-05-02 11:03:34 -07:00
fs io_uring: add support for marking commands as draining 2019-05-02 14:08:53 -06:00
include io_uring: add support for marking commands as draining 2019-05-02 14:08:53 -06:00
init init: initialize jump labels before command line option parsing 2019-04-19 09:46:05 -07:00
ipc
kernel Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-05-02 11:03:34 -07:00
lib lib/test_vmalloc.c: do not create cpumask_t variable on stack 2019-04-26 09:18:05 -07:00
LICENSES
mm mm/page_alloc.c: fix never set ALLOC_NOFRAGMENT flag 2019-04-26 09:18:05 -07:00
net udp: fix GRO packet of death 2019-05-01 22:29:56 -04:00
samples
scripts selinux/stable-5.1 PR 20190429 2019-04-30 08:38:02 -07:00
security selinux/stable-5.1 PR 20190429 2019-04-30 08:38:02 -07:00
sound
tools Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2019-05-02 11:03:34 -07:00
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MAINTAINERS LED update for 5.1-rc7. 2019-04-24 16:15:38 -07:00
Makefile gcc-9: silence 'address-of-packed-member' warning 2019-05-01 11:05:41 -07:00
README

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.