Bug 203745
| Summary: | [RHEL5 Alpha] LVM2 mirror: 'vgchange -an' sometimes fails to remove mirror corresponding maps. | ||||||
|---|---|---|---|---|---|---|---|
| Product: | Red Hat Enterprise Linux 5 | Reporter: | Kiyoshi Ueda <kueda> | ||||
| Component: | lvm2 | Assignee: | Petr Rockai <prockai> | ||||
| Status: | CLOSED ERRATA | QA Contact: | |||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | medium | ||||||
| Version: | 5.0 | CC: | agk, coughlan, dwysocha, i-kitayama, jbrassow, jnomura, junichi.nomura, kueda, kueda, mbroz | ||||
| Target Milestone: | --- | ||||||
| Target Release: | --- | ||||||
| Hardware: | All | ||||||
| OS: | Linux | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | RHBA-2007-0516 | Doc Type: | Bug Fix | ||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2007-11-07 16:48:43 UTC | Type: | --- | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Bug Depends On: | |||||||
| Bug Blocks: | 228988 | ||||||
| Attachments: |
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Created attachment 134725 [details]
Test script
The problem reproduces even if udev is disabled. When dmeventd is disabled, it didn't reproduce after about 400 trials. (It usually reproduces within 100 trials.) However, when dmeventd is disabled, about once in 500 trials, I observed vgchange -ay stalls. In this case, there is '[dmeventd]' process. Both dmeventd and vgchange seems to do select() on dmeventd socket. # As dmeventd is disabled by setting mirror_library = "none", # the daemon is invoked. This is an testing result update.
The problem still occurs in:
kernel-2.6.18-1.2732.el5
device-mapper-1.02.12-2.el5
lvm2-2.02.12-3.el5
udev-095-14
It takes several days to reproduce now, though it used to
take few hours.
This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux maintenance release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Update release for currently deployed products. This request is not yet committed for inclusion in an Update release. fix verified in lvm2-2.02.26-1.el5. An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2007-0516.html |
Description of problem: After 'vgchange -an' is executed, some parts of mirror corresponding maps are sometimes remained even though the vgchange is succeeded. Version-Release number of selected component: lvm2-2.02.09-1.0.RHEL5 device-mapper-1.02.09-1.0.RHEL5 kernel-2.6.17-1.2519.4.5.el5 How reproducible: Sometimes Steps to Reproduce: 1. If you have modified the /etc/lvm/lvm.conf, reset to default setting. 2. Run attached script. # ./vgchange-fail.sh The attached script do the following: o create a file and setup a loop-back device by using the file o create PVs by linear mapping to the loop-back device o create VGs and mirror LVs from the PVs o Run 'vgchange -an' and 'vgchange -ay' until a problem occurs (e.g. map is remained after 'vgchange -an', 'vgchange -an' fails.) Actual results: The script stops with 'Exit test.' message. (It will take a few minutes.) At the time, some parts of mirror corresponding maps are remained. (Output example is attached in Additional info below.) Expected results: The script doesn't stop. (at least, more than 30 minutes) Additional info: This problem seems to be prone to occur when many mirror LVs are exist. Output example of the vgchange-fail.sh is below. -------------------------------------------------------------------- [root@nec-em4 ~]# ./vgchange-fail.sh INFO: Creating a file for loop setup. file=tmpfile 819200+0 records in 819200+0 records out 419430400 bytes (419 MB) copied, 22.9046 seconds, 18.3 MB/s INFO: Setting up loop device. dev=/dev/loop0 file=tmpfile INFO: Creating PV. nr_pv=20 Physical volume "/dev/mapper/pv0" successfully created Physical volume "/dev/mapper/pv1" successfully created Physical volume "/dev/mapper/pv2" successfully created Physical volume "/dev/mapper/pv3" successfully created Physical volume "/dev/mapper/pv4" successfully created Physical volume "/dev/mapper/pv5" successfully created Physical volume "/dev/mapper/pv6" successfully created Physical volume "/dev/mapper/pv7" successfully created Physical volume "/dev/mapper/pv8" successfully created Physical volume "/dev/mapper/pv9" successfully created Physical volume "/dev/mapper/pv10" successfully created Physical volume "/dev/mapper/pv11" successfully created Physical volume "/dev/mapper/pv12" successfully created Physical volume "/dev/mapper/pv13" successfully created Physical volume "/dev/mapper/pv14" successfully created Physical volume "/dev/mapper/pv15" successfully created Physical volume "/dev/mapper/pv16" successfully created Physical volume "/dev/mapper/pv17" successfully created Physical volume "/dev/mapper/pv18" successfully created Physical volume "/dev/mapper/pv19" successfully created INFO: Creating VG. nr_vg=4. each pv in a vg: 5 INFO: vgname=testvg0 Volume group "testvg0" successfully created INFO: vgname=testvg1 Volume group "testvg1" successfully created INFO: vgname=testvg2 Volume group "testvg2" successfully created INFO: vgname=testvg3 Volume group "testvg3" successfully created INFO: Creating LV. each lv in a vg: 4 INFO: lvname=testvg0/lv0 Logical volume "lv0" created INFO: lvname=testvg0/lv1 Logical volume "lv1" created INFO: lvname=testvg0/lv2 Logical volume "lv2" created INFO: lvname=testvg0/lv3 Logical volume "lv3" created INFO: lvname=testvg1/lv0 Logical volume "lv0" created INFO: lvname=testvg1/lv1 Logical volume "lv1" created INFO: lvname=testvg1/lv2 Logical volume "lv2" created INFO: lvname=testvg1/lv3 Logical volume "lv3" created INFO: lvname=testvg2/lv0 Logical volume "lv0" created INFO: lvname=testvg2/lv1 Logical volume "lv1" created INFO: lvname=testvg2/lv2 Logical volume "lv2" created INFO: lvname=testvg2/lv3 Logical volume "lv3" created INFO: lvname=testvg3/lv0 Logical volume "lv0" created INFO: lvname=testvg3/lv1 Logical volume "lv1" created INFO: lvname=testvg3/lv2 Logical volume "lv2" created INFO: lvname=testvg3/lv3 Logical volume "lv3" created INFO: Start activate/deactivate testing. INFO: This test stops when a problem occurs. INFO: trials=0. deactivating all vgs. 0 logical volume(s) in volume group "testvg3" now active 0 logical volume(s) in volume group "testvg2" now active 0 logical volume(s) in volume group "testvg1" now active 0 logical volume(s) in volume group "testvg0" now active INFO: trials=0. activating all vgs. 4 logical volume(s) in volume group "testvg3" now active 4 logical volume(s) in volume group "testvg2" now active 4 logical volume(s) in volume group "testvg1" now active 4 logical volume(s) in volume group "testvg0" now active INFO: trials=1. deactivating all vgs. 0 logical volume(s) in volume group "testvg3" now active 0 logical volume(s) in volume group "testvg2" now active 0 logical volume(s) in volume group "testvg1" now active 0 logical volume(s) in volume group "testvg0" now active INFO: The problem occurs. Exit test. [root@nec-em4 ~]# [root@nec-em4 ~]# dmsetup table pv18: 0 40960 linear 7:0 737280 pv7: 0 40960 linear 7:0 286720 testvg0-lv1_mlog: 0 8192 linear 253:4 8576 testvg1-lv2_mlog: 0 8192 linear 253:9 16768 pv17: 0 40960 linear 7:0 696320 pv6: 0 40960 linear 7:0 245760 pv16: 0 40960 linear 7:0 655360 pv5: 0 40960 linear 7:0 204800 testvg0-lv2_mlog: 0 8192 linear 253:4 16768 pv15: 0 40960 linear 7:0 614400 pv4: 0 40960 linear 7:0 163840 testvg0-lv3_mlog: 0 8192 linear 253:4 24960 pv14: 0 40960 linear 7:0 573440 pv3: 0 40960 linear 7:0 122880 pv13: 0 40960 linear 7:0 532480 pv2: 0 40960 linear 7:0 81920 pv12: 0 40960 linear 7:0 491520 pv1: 0 40960 linear 7:0 40960 pv11: 0 40960 linear 7:0 450560 pv0: 0 40960 linear 7:0 0 pv10: 0 40960 linear 7:0 409600 pv9: 0 40960 linear 7:0 368640 testvg0-lv0_mlog: 0 8192 linear 253:4 384 pv19: 0 40960 linear 7:0 778240 pv8: 0 40960 linear 7:0 327680 [root@nec-em4 ~]# [root@nec-em4 ~]# dmsetup ls --tree pv18 (253:18) `- (7:0) pv7 (253:7) `- (7:0) testvg0-lv1_mlog (253:72) `-pv4 (253:4) `- (7:0) testvg1-lv2_mlog (253:60) `-pv9 (253:9) `- (7:0) pv17 (253:17) `- (7:0) pv6 (253:6) `- (7:0) pv16 (253:16) `- (7:0) pv5 (253:5) `- (7:0) testvg0-lv2_mlog (253:76) `-pv4 (253:4) `- (7:0) pv15 (253:15) `- (7:0) testvg0-lv3_mlog (253:80) `-pv4 (253:4) `- (7:0) pv14 (253:14) `- (7:0) pv3 (253:3) `- (7:0) pv13 (253:13) `- (7:0) pv2 (253:2) `- (7:0) pv12 (253:12) `- (7:0) pv1 (253:1) `- (7:0) pv11 (253:11) `- (7:0) pv0 (253:0) `- (7:0) pv10 (253:10) `- (7:0) testvg0-lv0_mlog (253:68) `-pv4 (253:4) `- (7:0) pv19 (253:19) `- (7:0) pv8 (253:8) `- (7:0) [root@nec-em4 ~]# --------------------------------------------------------------------