Re: md raid6 oops in 6.6.4 stable

[Genes Lists]

On 12/7/23 12:37, Song Liu wrote:
...
>    kernel:  md_end_clone_io+0x75/0xa0     <<< change in md_end_clone_io
>
> The commit only changes how we update bi_status. But bi_status was not
> used/checked at all between md_end_clone_io and the trap (lock cmpxchg).
> Did I miss something?
>
> Given the issue takes very long to reproduce. Maybe we have the issue
> before 6.6.4?
>
> Thanks,
> Song

Thanks for clarifying that point.

In meantime I rebooted server (shutdown was a struggle) - finally I 
fsck'd the filesystem (ext4) sitting on the raid6 - and manually ran the 
triggering rsync. This of course completed normally. That's either good 
or bad depending on your perspective :)

If I can get it to crash again, I will either start a git bisect (from 
6.6.3) or see if 6.7rc4 shows same issue.

thanks,

gene