Re: [question] solution for raid10 configuration concurrent with io

[Yu Kuai <yukuai1@xxxxxxxxxxxxxxx>]

Hi,

在 2023/04/27 14:53, Xiao Ni 写道:

> > // assum that rdev is NULL, and replacement is not NULL
>
> How can trigger this? Could you give the detailed commands?

This is just because raid10_remove_disk() set rdev to NULL first, and
then replace rdev with replacement. This is temporary but io can
concurrent with this temporary status.

raid10_remove_disk

 p = conf->mirrors + number;
 rdevp = &p->rdev;
 *rdevp = NULL;
 // here!
 p->rdev = p->replacement;
 p->replacement = NULL;

Thanks,
Kuai