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Merge pull request #13961 from mwilck/udev-no-exit-timeout

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udevd: wait for workers to finish when exiting
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2019-11-13 08:56:49 +01:00 committed by GitHub
commit 7b631898ef
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2 changed files with 13 additions and 23 deletions
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11
NEWS
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@ -2,6 +2,17 @@ systemd System and Service Manager
CHANGES WITH 244 in spe:
* systemd-udevd: removed the 30s timeout for killing stale workers on
exit. systemd-udevd now waits for workers to finish. The hard-coded
exit timeout of 30s was too short for some large installations, where
driver initialization could be prematurely interrupted during initrd
processing if the root file system had been mounted and init was
preparing to switch root. If udevd is run without systemd and workers
are hanging while udevd receives an exit signal, udevd will now exit
when udev.event_timeout is reached for the last hanging worker. With
systemd, the exit timeout can additionally be configured using
TimeoutStopSec= in systemd-udevd.service.
* Support for the cpuset cgroups v2 controller has been added.
Processes may be restricted to specific CPUs using the new
AllowedCPUs= setting, and to specific memory NUMA nodes using the new

25
src/udev/udevd.c
View File

@ -293,6 +293,8 @@ static void manager_free(Manager *manager) {
if (!manager)
return;
manager->monitor = sd_device_monitor_unref(manager->monitor);
udev_builtin_exit();
if (manager->pid == getpid_cached())
@ -774,21 +776,7 @@ set_delaying_seqnum:
return true;
}
static int on_exit_timeout(sd_event_source *s, uint64_t usec, void *userdata) {
Manager *manager = userdata;
assert(manager);
log_error("Giving up waiting for workers to finish.");
sd_event_exit(manager->event, -ETIMEDOUT);
return 1;
}
static void manager_exit(Manager *manager) {
uint64_t usec;
int r;
assert(manager);
manager->exit = true;
@ -803,18 +791,9 @@ static void manager_exit(Manager *manager) {
manager->inotify_event = sd_event_source_unref(manager->inotify_event);
manager->fd_inotify = safe_close(manager->fd_inotify);
manager->monitor = sd_device_monitor_unref(manager->monitor);
/* discard queued events and kill workers */
event_queue_cleanup(manager, EVENT_QUEUED);
manager_kill_workers(manager);
assert_se(sd_event_now(manager->event, CLOCK_MONOTONIC, &usec) >= 0);
r = sd_event_add_time(manager->event, NULL, CLOCK_MONOTONIC,
usec + 30 * USEC_PER_SEC, USEC_PER_SEC, on_exit_timeout, manager);
if (r < 0)
return;
}
/* reload requested, HUP signal received, rules changed, builtin changed */