Re: [PATCH v4 7/7] iov_iter, block: Make bio structs pin pages rather than ref'ing if appropriate

From: Jens Axboe
Date: Tue Jan 10 2023 - 16:42:05 EST


On 1/10/23 7:37 AM, David Howells wrote:
> Jens Axboe <axboe@xxxxxxxxx> wrote:
>
>> I think it makes more sense to have NO_REF check, to be honest, as that
>> means the general path doesn't have to set that flag. But I don't feel
>> too strongly about that part.
>
> It's just that the logic seems weird with BIO_NO_PAGE_REF and BIO_PAGE_PINNED
> being kind of opposite polarity.
>
> Anyway, see attached.

Yeah, I guess I'll have to agree with you. So let's go with that approach
instead, but then please:

1) Change that flag as a prep patch so you don't mix up the two
2) Incorporate the feedback from the previous patch

Any chance we can get that cleanup_mode thing cleaned up as well?

--
Jens Axboe