[dm-devel] A crash caused by the commit 0dd84b319352bb8ba64752d4e45396d8b13e6018

[Zdenek Kabelac]

Dne 04. 11. 22 v 2:23 Guoqing Jiang napsal(a):
>
>
> On 11/3/22 10:46 PM, Heming Zhao wrote:
>> On 11/3/22 11:47 AM, Guoqing Jiang wrote:
>>> Hi,
>>>
>>> On 11/3/22 12:27 AM, Mikulas Patocka wrote:
>>>> Hi
>>>>
>>>> There's a crash in the test shell/lvchange-rebuild-raid.sh when running
>>>> the lvm testsuite. It can be reproduced by running "make check_local
>>>> T=shell/lvchange-rebuild-raid.sh" in a loop.
>>>
>>> I have problem to run the cmd (not sure what I missed), it would be better if
>>> the relevant cmds are extracted from the script then I can reproduce it with
>>> those cmds directly.
>>>
>>> [root at localhost lvm2]# git log | head -1
>>> commit 36a923926c2c27c1a8a5ac262387d2a4d3e620f8
>>> [root at localhost lvm2]# make check_local T=shell/lvchange-rebuild-raid.sh
>>> make -C libdm device-mapper
>>> [...]
>>> make -C daemons
>>> make[1]: Nothing to be done for 'all'.
>>> make -C test check_local
>>> VERBOSE=0 ./lib/runner \
>>>          --testdir . --outdir results \
>>>          --flavours ndev-vanilla --only shell/lvchange-rebuild-raid.sh 
>>> --skip @
>>> running 1 tests
>>> ###      running: [ndev-vanilla] shell/lvchange-rebuild-raid.sh 0
>>> | [ 0:00] lib/inittest: line 133: 
>>> /tmp/LVMTEST317948.iCoLwmDhZW/dev/testnull: Permission denied
>>> | [ 0:00] Filesystem does support devices in 
>>> /tmp/LVMTEST317948.iCoLwmDhZW/dev (mounted with nodev?)
>>
>> I didn't read other mails in this thread, only for above issue.
>> If you use opensuse, systemd service tmp.mount uses nodev option to mount 
>> tmpfs on /tmp.
>> From my experience, there are two methods to fix(work around):
>> 1. systemctl disable tmp.mount && systemctl mask tmp.mount && reboot
>> 2. mv /usr/lib/systemd/system/tmp.mount /root/ && reboot
>
> I am using centos similar system, I can try leap later. Appreciate for the 
> tips, Heming.


You can always redirect default /tmp dir to some other place/filesystem that 
allows you to create /dev nodes. Eventually for 'brave men'  you can let lvm2 
test suite to play directly with your /dev dir.  Normally nothing bad should 
happen, but we tend to prefer more controled '/dev' managed for a test.

Here are two envvars to play with:


make check_local T=shell/lvchange-rebuild-raid.sh LVM_TEST_DIR=/myhomefsdir  
LVM_TEST_DEVDIR=/dev

LVM_TEST_DIR for setting of dir where test creates all its files

LVM_TEST_DEVDIR  you can explicitly tell to keep using system's /dev   
(instead of dir created within tmpdir)


Regards


Zdenek