Re: [PATCH] block: don't set GD_NEED_PART_SCAN if scan partition failed

[Jens Axboe]

On 4/6/23 8:01 PM, Ming Lei wrote:
> On Thu, Apr 06, 2023 at 04:29:43PM -0600, Jens Axboe wrote:
>> On 4/5/23 9:42 PM, Yu Kuai wrote:
>>> Hi, Jens!
>>>
>>> 在 2023/03/22 11:59, Yu Kuai 写道:
>>>> From: Yu Kuai <yukuai3@xxxxxxxxxx>
>>>>
>>>> Currently if disk_scan_partitions() failed, GD_NEED_PART_SCAN will still
>>>> set, and partition scan will be proceed again when blkdev_get_by_dev()
>>>> is called. However, this will cause a problem that re-assemble partitioned
>>>> raid device will creat partition for underlying disk.
>>>>
>>>> Test procedure:
>>>>
>>>> mdadm -CR /dev/md0 -l 1 -n 2 /dev/sda /dev/sdb -e 1.0
>>>> sgdisk -n 0:0:+100MiB /dev/md0
>>>> blockdev --rereadpt /dev/sda
>>>> blockdev --rereadpt /dev/sdb
>>>> mdadm -S /dev/md0
>>>> mdadm -A /dev/md0 /dev/sda /dev/sdb
>>>>
>>>> Test result: underlying disk partition and raid partition can be
>>>> observed at the same time
>>>>
>>>> Note that this can still happen in come corner cases that
>>>> GD_NEED_PART_SCAN can be set for underlying disk while re-assemble raid
>>>> device.
>>>>
>>>
>>> Can you apply this patch?
>>
>> None of them apply to my for-6.4/block branch...
> 
> This patch is bug fix, and probably should aim at 6.3.

Yeah I see now, but it's a bit of a mashup of 2 patches, and
then a separate one. I've applied the single fixup for 6.3.

-- 
Jens Axboe