* tail: reduce CPU load for polling
This reduces the CPU load for polling drastically (from ~80% down to ~5%)
by removing/fixing several previous workarounds related to polling,
while still passing all related GNU test-suite checks.
* set Notify::PollWatcher delay to: sleep_sec/10 instead of
sleep_sec/100
* set recv_timeout to sleep_sec instead of sleep_sec/100
* remove the manual polling of watched files
Bugs:
* fix an issue with headers to consistently pass
"test_follow_name_retry_headers" and "gnu/tests/tail-2/overlay-headers.sh"
Code clean-up and refactor
* make fields of struct FileHandling private (and add getters/setters)
to ensure that the paths are absolute and match the paths returned by
Notify::Events
* replace calls to "crash!" with "return USimpleError"
* clean-up formatting
At least, two use cases:
* when hacking on test update
* when we want to rebuild only Rust coreutils with the right option
Indeed, the GNU code should not cache often in this case
Niyaz Nigmatullin
Jan ScheerandGitHub
Terts DiepraamandGitHub
Sylvestre Ledru
ndd7xv
Justin TraceyandSylvestre Ledru
gmnsiiandGitHub