39 lines
1.6 KiB
Diff
39 lines
1.6 KiB
Diff
Work around LVM/cryptsetup errors like:
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semid 32768: semop failed for cookie 0xd4d41f4: incorrect semaphore state
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Failed to set a proper state for notification semaphore identified by cookie value 223166964 (0xd4d41f4) to initialize waiting for incoming notifications.
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and (when running "cryptsetup --debug"):
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Uevent not generated! Calling udev_complete internally to avoid process lock-up.
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Here for some reason libdm *thinks* that the uevent hasn't been
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emitted, so it calls udev_complete. But the uevent actually *has*
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been emitted, so udev calls ‘dmsetup udevcomplete’ as well, leading to
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a race.
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This is probably a reoccurence of the problem described here:
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http://www.redhat.com/archives/dm-devel/2011-August/msg00075.html
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http://www.redhat.com/archives/linux-lvm/2011-September/msg00023.html
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which was fixed in the kernel, so it's not clear why it's surfacing
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again. Maybe netlink_broadcast_filtered() has started returning some
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other bogus error code.
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diff -ru -x '*~' LVM2.2.02.98/libdm/ioctl/libdm-iface.c LVM2.2.02.98-new/libdm/ioctl/libdm-iface.c
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--- LVM2.2.02.98/libdm/ioctl/libdm-iface.c 2012-10-15 10:24:58.000000000 -0400
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+++ LVM2.2.02.98-new/libdm/ioctl/libdm-iface.c 2012-10-15 14:19:06.774363736 -0400
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@@ -1754,9 +1754,12 @@
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if (ioctl_with_uevent && dm_udev_get_sync_support() &&
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!_check_uevent_generated(dmi)) {
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+ log_debug("warning: Uevent might not be generated!");
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+#if 0
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log_debug("Uevent not generated! Calling udev_complete "
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"internally to avoid process lock-up.");
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_udev_complete(dmt);
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+#endif
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}
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if (!_dm_ioctl_unmangle_names(dmt->type, dmi))
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