linux-kernel - Re: rename ->make_request_fn and move it to the block_device

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Date:   Tue, 30 Jun 2020 12:21:53 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Christoph Hellwig <hch@....de>
Cc:     linux-bcache@...r.kernel.org, linux-xtensa@...ux-xtensa.org,
        linux-nvdimm@...ts.01.org, linux-s390@...r.kernel.org,
        dm-devel@...hat.com, linux-nvme@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-raid@...r.kernel.org,
        linux-m68k@...ts.linux-m68k.org, linuxppc-dev@...ts.ozlabs.org,
        drbd-dev@...ts.linbit.com
Subject: Re: rename ->make_request_fn and move it to the
 block_device_operations

On 6/30/20 12:19 PM, Christoph Hellwig wrote:
> On Tue, Jun 30, 2020 at 09:43:31AM -0600, Jens Axboe wrote:
>> On 6/30/20 7:57 AM, Jens Axboe wrote:
>>> On 6/29/20 1:39 PM, Christoph Hellwig wrote:
>>>> Hi Jens,
>>>>
>>>> this series moves the make_request_fn method into block_device_operations
>>>> with the much more descriptive ->submit_bio name.  It then also gives
>>>> generic_make_request a more descriptive name, and further optimize the
>>>> path to issue to blk-mq, removing the need for the direct_make_request
>>>> bypass.
>>>
>>> Looks good to me, and it's a nice cleanup as well. Applied.
>>
>> Dropped, insta-crashes with dm:
> 
> Hmm.  Can you send me what is at "submit_bio_noacct+0x1f6" from gdb?
> Or your .config?

I'd have to apply and compile again. But it's a bad RIP, so I'm guessing
it's ->submit_bio == NULL. Let me know if you really need it, and I can
re-generate the OOPS and have the vmlinux too.

-- 
Jens Axboe