Hi Winder, On Wed, Sep 16, 2020 at 2:53 AM Sung, KoWei <winders@xxxxxxxxxx> wrote: > > Hi, > > I found RAID5 stability issue while doing disk expansion. > I attached 4 disks (/dev/sda, /dev/sdb, /dev/sdc and /dev/sdd) and create partition by “create_partition.sh” scripts on my PC and run my test scripts “raid_reshape_12.sh” (as attached). > Basically, the test will add partitions to RAID5 (/dev/md3) and write files to /dev/md3 (ext4) at the same time. > Within 1 or 2 hours, kernel will get crashed (Oops) and reshape/resync cannot be finished forever (log as attached). > > The issue happens randomly, but it most likely happens at beginning of reshape process. When kernel crash happens, the reshape stops at about 3-10% complete only. > Moreover, it is not related to any partition size, because I’ve tried different size, but issue still exists. > I've also tried different kernel (4.1/4.2/4.9/4.19/5.4/5.8), and all kernel version can see this issue. Thanks for the report. I just started some tests with the script. I will update whether it repros the issue. Song
