linux-kernel - Re: [PATCH v20 29/32] block: Replace BIO_NO_PAGE_REF with BIO_PAGE

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Date:   Sat, 20 May 2023 01:52:50 -0400
From:   Kent Overstreet <kent.overstreet@...ux.dev>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     David Howells <dhowells@...hat.com>, Jens Axboe <axboe@...nel.dk>,
        Al Viro <viro@...iv.linux.org.uk>,
        Matthew Wilcox <willy@...radead.org>, Jan Kara <jack@...e.cz>,
        Jeff Layton <jlayton@...nel.org>,
        David Hildenbrand <david@...hat.com>,
        Jason Gunthorpe <jgg@...dia.com>,
        Logan Gunthorpe <logang@...tatee.com>,
        Hillf Danton <hdanton@...a.com>,
        Christian Brauner <brauner@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-fsdevel@...r.kernel.org, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Christoph Hellwig <hch@....de>,
        John Hubbard <jhubbard@...dia.com>
Subject: Re: [PATCH v20 29/32] block: Replace BIO_NO_PAGE_REF with
 BIO_PAGE_REFFED with inverted logic

On Fri, May 19, 2023 at 09:17:43PM -0700, Christoph Hellwig wrote:
> On Sat, May 20, 2023 at 12:13:49AM -0400, Kent Overstreet wrote:
> > I suppose this way setting it can be done in bio_iov_iter_get_pages() -
> > ok yeah, that makes sense.
> > 
> > But it seems like it should be set in bio_iov_iter_get_pages() though,
> > and I'm not seeing that?
> 
> It is set in bio_iov_iter_get_pages in this patch.  The later gets
> replaced with the pinned flag when we bio_iov_iter_get_pages is
> changed to pin pages instead.

Whoops, missed it.

Reviewed-by: Kent Overstreet <kent.overstreet@...ux.dev>