Public bug reported:
Coming from https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1276705
.
Commit 786235ee in the upstream kernel made kthread_create() return
immediately upon SIGKILL. On several machines, device initialization
phase takes more than 30 seconds before kthread_create() is called.
Since systemd-udevd unconditionally sends SIGKILL upon hardcoded 30
seconds timeout, boot is failing upon such machines. The conclusion
of LKML discussion seems that we should fix systemd-udevd side
rather than fixing kthread_create() side because hardcoded 30 seconds
timeout is considered as a bug of systemd. Therefore, please consider
allowing configurable (or at least much longer) timeout for
systemd-udevd worker process.
** Affects: systemd (Ubuntu)
Importance: Undecided
Status: New
** Tags: trusty
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https://bugs.launchpad.net/bugs/1297248
Title:
Wait timeout for systemd-udevd worker process is too short
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