With initrd's scripts/init-top/udev changed to run udev with -D and >
/run/initrd/udev.log 2>&1, I get this output. I also added to
udev/udevd.c the following patch. Note that IIUC there are both workers
and events on the list. Every time that I've tried to print out info
about the remaining events, I've failed to reproduce the hang.
(This, fwiw, is on the VMs with no LVM at all)
Index: udev-173/udev/udevd.c
===================================================================
--- udev-173.orig/udev/udevd.c 2011-10-06 22:14:07.000000000 -0500
+++ udev-173/udev/udevd.c 2011-10-06 22:34:12.000000000 -0500
@@ -1633,8 +1633,16 @@
worker_kill(udev, 0);
/* exit after all has cleaned up */
- if (udev_list_is_empty(&event_list) &&
udev_list_is_empty(&worker_list))
+ if (udev_list_is_empty(&event_list) &&
udev_list_is_empty(&worker_list)) {
+ info(udev, "event list and worker list are
empty\n");
break;
+ }
+ if (!udev_list_is_empty(&event_list)) {
+ info(udev, "with udev_exit, event list not
empty\n");
+ }
+ if (!udev_list_is_empty(&worker_list)) {
+ info(udev, "with udev_exit, worker list not
empty\n");
+ }
/* timeout at exit for workers to finish */
timeout = 60 * 1000;
** Attachment added: "udev3.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/818177/+attachment/2520821/+files/udev3.log
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https://bugs.launchpad.net/bugs/818177
Title:
boot failures because 'udevadm exit' does not kill udevd worker
threads
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