Hello.
I created two LVM physical volumes: one on NVMe device and one on SATA
SSD. I added them to a volume group and created a logical RAID1 volume
in it. Then I enabled 'writemostly' flag on the second (slowest) PV.
And my system started to freeze at random times with no messages in
syslog. I was able to determine that the freezing was happening during
execution of 'fstrim' (via systemd timer). I checked this by running
'fstrim' manually.
If I disable the 'writemostly' flag, I experience no freezes. I can
reproduce this behavior on vanilla 6.5.0 kernel.
My LV is 150 GB ext4 volume, and it has lots of files in it, so running
'fstrim' takes around a minute. This may be important.
Additional information:
OS: Linux Mint 21.2
CPU: AMD Ryzen 7 5800X
NVMe: Samsung SSD 980 500GB
SATA SSD: Samsung SSD 850 EVO M.2 250GB
Best regards,
Kirill Kirilenko.
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