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Subject: Re: [PATCH 05/10] block: do not reassig ->bi_bdev when partition
 remapping
References: <20210124100241.1167849-1-hch@lst.de>
 <20210124100241.1167849-6-hch@lst.de>
 <dfdff48c-c263-8e7c-cb52-28e7bee00c45@kernel.dk>
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 <2b600368-96fa-7caf-f05b-321de616f7c9@kernel.dk>
 <13667b22-029b-d7be-02da-96fce22cfd8f@kernel.dk>
 <20210125181349.GA14432@lst.de>
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 <20210125181826.GA14957@lst.de>
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 <20210125182150.GA15367@lst.de>
From: Jens Axboe <axboe@kernel.dk>
Message-ID: <387c824a-c713-a087-2f6f-434ba127b1df@kernel.dk>
Date: Mon, 25 Jan 2021 11:31:23 -0700
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To: Christoph Hellwig <hch@lst.de>
Cc: Tejun Heo <tj@kernel.org>, Coly Li <colyli@suse.de>, Song Liu <song@kernel.org>, device-mapper development <dm-devel@redhat.com>, linux-bcache <linux-bcache@vger.kernel.org>, "open list:SOFTWARE RAID (Multiple Disks) SUPPORT" <linux-raid@vger.kernel.org>, linux-s390 <linux-s390@vger.kernel.org>, linux-block <linux-block@vger.kernel.org>

On 1/25/21 11:21 AM, Christoph Hellwig wrote:
> On Mon, Jan 25, 2021 at 11:19:23AM -0700, Jens Axboe wrote:
>> On 1/25/21 11:18 AM, Christoph Hellwig wrote:
>>> On Mon, Jan 25, 2021 at 11:15:04AM -0700, Jens Axboe wrote:
>>>> On 1/25/21 11:13 AM, Christoph Hellwig wrote:
>>>>> On Mon, Jan 25, 2021 at 11:03:24AM -0700, Jens Axboe wrote:
>>>>>> Partition table entries are not in disk order.
>>>>>
>>>>> And the issue shows up with the series just up to the this patch,
>>>>> without any later patches?
>>>>
>>>> At that patch specifically. I bisected it, and then I double checked
>>>> by running the previous commit (boots fine), then apply this one, and
>>>> then I run into that error. So it should be 100% reliable.
>>>
>>> Ok, I have an idea.  With EOD message you mean this printk, right:
>>>
>>> 	pr_info_ratelimited("attempt to access beyond end of device\n"
>>>                             "%s: rw=%d, want=%llu, limit=%llu\n",
>>> 			    ...
>>>
>>> right?
>>
>> Yep
> 
> Can you give this untested patch a spin?  This should fix the
> case where we check the eod for the original partition with the
> remapped bi_sectors.  Looking into a local reproducer now.

Yep, with that applied on top my laptop boots again.

-- 
Jens Axboe