[dm-devel] [PATCH 05/10] block: do not reassig ->bi_bdev when partition remapping

[Jens Axboe]

On 1/25/21 10:57 AM, Jens Axboe wrote:
> On 1/25/21 10:55 AM, Christoph Hellwig wrote:
>> On Mon, Jan 25, 2021 at 10:53:36AM -0700, Jens Axboe wrote:
>>> On Sun, Jan 24, 2021 at 3:05 AM Christoph Hellwig <hch at lst.de> wrote:
>>>>
>>>> There is no good reason to reassign ->bi_bdev when remapping the
>>>> partition-relative block number to the device wide one, as all the
>>>> information required by the drivers comes from the gendisk anyway.
>>>>
>>>> Keeping the original ->bi_bdev alive will allow to greatly simplify
>>>> the partition-away I/O accounting.
>>>
>>> This one causes boot failures for me on my laptop...
>>
>> Any output to share?  Details of the config?
> 
> .config attached - hard to share any output, as it seems to load the
> kernel fine, but latter parts of the boot process end up with errors
> after the screen blanks. It's a laptop, so nothing fancy in terms of
> logging. FWIW, it did boot on my test box.
> 
> Let me try and do a video...

Here you go, complaining about EOD access on partition 6.

sudo fdisk -l /dev/nvme0n1
Disk /dev/nvme0n1: 953.89 GiB, 1024209543168 bytes, 2000409264 sectors
Disk model: SAMSUNG MZVLB1T0HBLR-000L7              
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 51484599-D608-465A-A3A9-D36F1D6D126E

Device               Start        End   Sectors   Size Type
/dev/nvme0n1p1        2048     534527    532480   260M EFI System
/dev/nvme0n1p2      534528     567295     32768    16M Microsoft reserved
/dev/nvme0n1p3      567296  257560575 256993280 122.6G Microsoft basic data
/dev/nvme0n1p4  1998360576 2000408575   2048000  1000M Windows recovery environment
/dev/nvme0n1p5   257560576  261718015   4157440     2G Linux filesystem
/dev/nvme0n1p6   261718016  390625279 128907264  61.5G Linux filesystem
/dev/nvme0n1p7   390625280  421875711  31250432  14.9G Linux swap
/dev/nvme0n1p8   421875712 1007812607 585936896 279.4G Linux filesystem
/dev/nvme0n1p9  1007812608 1398437887 390625280 186.3G Linux filesystem
/dev/nvme0n1p10 1398437888 1593749503 195311616  93.1G Linux filesystem

Partition table entries are not in disk order.

-- 
Jens Axboe

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