Re: [PATCH md-6.13] md: remove bitmap file support

[Yu Kuai]

Hi,

在 2024/11/08 7:41, Song Liu 写道:
> On Thu, Nov 7, 2024 at 5:02 AM Yu Kuai <yukuai1@xxxxxxxxxxxxxxx> wrote:
> > From: Yu Kuai <yukuai3@xxxxxxxxxx>
> >
> > The bitmap file has been marked as deprecated for more than a year now,
> > let's remove it, and we don't need to care about this case in the new
> > bitmap.
> >
> > Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
>
> What happens when an old array with bitmap file boots into a kernel
> without bitmap file support?

If mdadm is used with bitmap file support, then kenel will just ignore
the bitmap, the same as none bitmap. Perhaps it's better to leave a
error message?

And if mdadm is updated, reassemble will fail.

Thanks,
Kuai

> Thanks,
> Song
> .