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udev: wait for an extra time before the manager kills workers

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Otherwise, udev workers cannot detect slow programs invoked by
IMPORT{program}=, PROGRAM=, or RUN=, and whole worker process may be
killed.

Fixes #30436.

Co-authored-by: sushmbha <sushmita.bhattacharya@oracle.com>
This commit is contained in:
Yu Watanabe
2024-01-03 04:23:22 +09:00
co-authored by sushmbha
parent 11706971e8
commit b16c6076cb
2 changed files with 33 additions and 1 deletions
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docs/ENVIRONMENT.md
+6
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@@ -249,6 +249,12 @@ All tools:
devices sysfs path are actually backed by sysfs. Relaxing this verification
is useful for testing purposes.
* `$SYSTEMD_UDEV_EXTRA_TIMEOUT_SEC=` — Specifies an extra timespan that the
udev manager process waits for a worker process kills slow programs specified
by IMPORT{program}=, PROGRAM=, or RUN=, and finalizes the processing event.
If the worker process cannot finalize the event within the specified timespan,
the worker process is killed by the manager process. Defaults to 10 seconds.
`udevadm` and `systemd-hwdb`:
* `SYSTEMD_HWDB_UPDATE_BYPASS=` — If set to "1", execution of hwdb updates is skipped