Hi, Song Liu: May I know if you're able to reproduce this issue? Thanks a lot for your help. Best Regards, Winder ________________________________________ From: Song Liu <song@xxxxxxxxxx> Sent: Thursday, September 17, 2020 3:03 PM To: Sung, KoWei Cc: linux-raid@xxxxxxxxxxxxxxx; Bshara, Saeed; Duan, HanShen; Tokoyo, Hiroshi; Fortin, Mike Subject: RE: [EXTERNAL] RAID5 issue with UBUNTU 20.04.1 on my desktop CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you can confirm the sender and know the content is safe. 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
