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

[Yu Kuai <yukuai1@huaweicloud.com>]

Hi,

在 2024/11/08 7:41, Song Liu 写道:
> On Thu, Nov 7, 2024 at 5:02 AM Yu Kuai <yukuai1@huaweicloud.com> wrote:
>>
>> From: Yu Kuai <yukuai3@huawei.com>
>>
>> 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@huawei.com>
> 
> 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
> .
>