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Fix verified in the latest rpms
kernel-4.18.0-269.el8 BUILT: Thu Dec 31 07:52:55 CST 2020
lvm2-2.03.11-0.4.20201222gitb84a992.el8 BUILT: Tue Dec 22 06:33:49 CST 2020
lvm2-libs-2.03.11-0.4.20201222gitb84a992.el8 BUILT: Tue Dec 22 06:33:49 CST 2020
[root@hayes-02 ~]# grep reserved_stack /etc/lvm/lvm.conf
# Configuration option activation/reserved_stack.
reserved_stack = 512 # edited by QA test script qe_lvmconf (on Thu Jan 7 13:37:46 CST 2021)!
[root@hayes-02 ~]# grep reserved_memory /etc/lvm/lvm.conf
# Configuration option activation/reserved_memory.
reserved_memory = 131072
[root@hayes-02 ~]# lvcreate -ay --thinpool my_pool -L 10G snapper
Thin pool volume with chunk size 64.00 KiB can address at most 15.81 TiB of data.
Logical volume "my_pool" created.
[root@hayes-02 ~]# lvcreate -ay --virtualsize 20G -T snapper/my_pool -n my_origin
WARNING: Sum of all thin volume sizes (20.00 GiB) exceeds the size of thin pool snapper/my_pool (10.00 GiB).
WARNING: You have not turned on protection against thin pools running out of space.
WARNING: Set activation/thin_pool_autoextend_threshold below 100 to trigger automatic extension of thin pools before they get full.
Logical volume "my_origin" created.
[root@hayes-02 ~]# lvcreate -ay -y -k n -s /dev/snapper/my_origin -n my_snap
WARNING: Sum of all thin volume sizes (40.00 GiB) exceeds the size of thin pool snapper/my_pool (10.00 GiB).
WARNING: You have not turned on protection against thin pools running out of space.
WARNING: Set activation/thin_pool_autoextend_threshold below 100 to trigger automatic extension of thin pools before they get full.
Logical volume "my_snap" created.
[root@hayes-02 ~]# grep segfault /var/log/messages
[root@hayes-02 ~]#
[root@hayes-02 ~]# ps -ef | grep dmeventd
root 4162 1 0 13:14 ? 00:00:00 /usr/sbin/dmeventd -f
root 12350 2991 0 13:40 pts/0 00:00:00 grep --color=auto dmeventd
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory (lvm2 bug fix and enhancement update), and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHBA-2021:1659