Instead of lengthy blurbs, switch to single-line, machine-readable
standardized (https://spdx.dev) license identifiers. The Linux kernel
switched long ago, so there is strong precedent.
Three cases are handled: AGPL-only, Apache-only, and dual licensed.
For the latter case, I chose (AGPL-3.0-or-later and Apache-2.0),
reasoning that our changes are extensive enough to apply our license.
The changes we applied mechanically with a script, except to
licenses/README.md.
Closes#9937
seastar::later() was recently deprecated and replaced with two
alternatives: a cheap seastar::yield() and an expensive (but more
powerful) seastar::check_for_io_immediately(), that corresponds to
the original later().
This patch replaces all later() calls with the weaker yield(). In
all cases except one, it's unambiguously correct. In one case
(test/perf scheduling_latency_measurer::stop()) it's not so ambiguous,
since check_for_io_immediately() will additionally force a poll and
so will cause more work to be done (but no additional tasks to be
executed). However, I think that any measurement that relies on
the measuring the work on the last tick to be inaccurate (you need
thousands of ticks to get any amount of confidence in the
measurement) that in the end it doesn't matter what we pick.
Tests: unit (dev)
Closes#9904
Currently, the serialized_action error is set to a shared_promise,
but is not returned to the caller, unless there is an
already outstanding action.
Note that setting the exception to the promise when noone
collected it via the shared_future caused 'Exceptional future ignored'
warning to be issued, as seen in #7352.
Fixes#7352
Signed-off-by: Benny Halevy <bhalevy@scylladb.com>
Currently, if `with_semaphore` returns exceptional future, it is not
propagated to the promise, and other waiters that got a shared
future will not see that.
Signed-off-by: Benny Halevy <bhalevy@scylladb.com>
Contains patch from Rafael to fix up includes.
* seastar c872c3408c...7f7cf0f232 (9):
> future: Consider result_unavailable invalid in future_state_base::ignore()
> future: Consider result_unavailable invalid in future_state_base::valid()
> Merge "future-util: split header" from Benny
> docs: corrected some text and code-examples in streaming-rpc docs
> future: Reduce nesting in future::then
> demos: coroutines: include std-compat.hh
> sstring: mark str() and methods using it as noexcept
> tls: Add an assert
> future: fix coroutine compilation
