Bug 1022876

Summary:	Kernel sends 2 remove events when dm device is removed
Product:	[Fedora] Fedora	Reporter:	Zdenek Kabelac <zkabelac>
Component:	kernel	Assignee:	Kernel Maintainer List <kernel-maint>
Status:	CLOSED INSUFFICIENT_DATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	22	CC:	gansalmon, itamar, jonathan, kernel-maint, lvm-team, madhu.chinakonda, marcelo.barbosa, mpatocka
Target Milestone:	---	Flags:	mpatocka: needinfo-
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-11-23 17:18:33 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description Zdenek Kabelac 2013-10-24 08:43:02 UTC

Description of problem:

From  udevadm monitor I could see 2 remove events being send as a result of single  ioctl(3, DM_DEV_REMOVE, 0x1d690e0).

The second event just wake-ups  udev uselessly.

Version-Release number of selected component (if applicable):
3.12


How reproducible:


Steps to Reproduce:
1. echo "0 1 zero" | dmsetup  create  test
2. run in separate window  'udevadm monitor --kernel --env'
3. dmsetup  remove test

Actual results:

KERNEL[74912.993392] remove   /devices/virtual/block/dm-8 (block)
ACTION=remove
DEVNAME=/dev/dm-8
DEVPATH=/devices/virtual/block/dm-8
DEVTYPE=disk
DM_COOKIE=6348169
MAJOR=253
MINOR=8
SEQNUM=2279
SUBSYSTEM=block
UDEV_LOG=3

KERNEL[74912.994059] remove   /devices/virtual/bdi/253:8 (bdi)
ACTION=remove
DEVPATH=/devices/virtual/bdi/253:8
SEQNUM=2280
SUBSYSTEM=bdi
UDEV_LOG=3

KERNEL[74912.994671] remove   /devices/virtual/block/dm-8 (block)
ACTION=remove
DEVNAME=/dev/dm-8
DEVPATH=/devices/virtual/block/dm-8
DEVTYPE=disk
MAJOR=253
MINOR=8
SEQNUM=2281
SUBSYSTEM=block
UDEV_LOG=3



Expected results:

Only 1 remove event for dm-8 

Additional info:

Comment 1 Zdenek Kabelac 2013-10-24 08:44:44 UTC

Mikulas, maybe you could take a short look ?

Comment 2 Jaroslav Reznik 2015-03-03 15:09:56 UTC

This bug appears to have been reported against 'rawhide' during the Fedora 22 development cycle.
Changing version to '22'.

More information and reason for this action is here:
https://fedoraproject.org/wiki/Fedora_Program_Management/HouseKeeping/Fedora22

Comment 3 Fedora Kernel Team 2015-11-23 17:18:33 UTC

*********** MASS BUG UPDATE **************
This bug is being closed with INSUFFICIENT_DATA as there has not been a response in over 4 weeks. If you are still experiencing this issue, please reopen and attach the relevant data from the latest kernel you are running and any data that might have been requested previously.