liburing

--------

This is the io_uring library, liburing. liburing provides helpers to setup and

teardown io_uring instances, and also a simplified interface for

applications that don't need (or want) to deal with the full kernel

side implementation.

For more info on io_uring, please see:

https://kernel.dk/io_uring.pdf

Subscribe to io-uring@vger.kernel.org for io_uring related discussions

and development for both kernel and userspace. The list is archived here:

https://lore.kernel.org/io-uring/

ulimit settings

---------------

io_uring accounts memory it needs under the rlimit memlocked option, which

can be quite low on some setups (64K). The default is usually enough for

most use cases, but bigger rings or things like registered buffers deplete

it quickly. root isn't under this restriction, but regular users are. Going

into detail on how to bump the limit on various systems is beyond the scope

of this little blurb, but check /etc/security/limits.conf for user specific

settings, or /etc/systemd/user.conf and /etc/systemd/system.conf for systemd

setups.

Regressions tests

-----------------

The bulk of liburing is actually regression/unit tests for both liburing and

the kernel io_uring support. Please note that this suite isn't expected to

pass on older kernels, and may even crash or hang older kernels!

License

-------

All software contained within this repo is dual licensed LGPL and MIT, see

COPYING and LICENSE, except for a header coming from the kernel which is

dual licensed GPL with a Linux-syscall-note exception and MIT, see

COPYING.GPL and <https://spdx.org/licenses/Linux-syscall-note.html>.

Jens Axboe 2020-01-20