From: Christoph Hellwig <hch@infradead.org>
To: David Howells <dhowells@redhat.com>
Cc: John Hubbard <jhubbard@nvidia.com>,
Christoph Hellwig <hch@infradead.org>,
Al Viro <viro@zeniv.linux.org.uk>,
Matthew Wilcox <willy@infradead.org>,
Jens Axboe <axboe@kernel.dk>, Jan Kara <jack@suse.cz>,
Jeff Layton <jlayton@kernel.org>,
David Hildenbrand <david@redhat.com>,
Jason Gunthorpe <jgg@nvidia.com>,
Logan Gunthorpe <logang@deltatee.com>,
linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org,
linux-kernel@vger.kernel.org, Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH v9 5/8] block: Replace BIO_NO_PAGE_REF with BIO_PAGE_REFFED with inverted logic
Date: Tue, 24 Jan 2023 22:30:09 -0800 [thread overview]
Message-ID: <Y9DMcThwiDnbVpQe@infradead.org> (raw)
In-Reply-To: <1353771.1674595077@warthog.procyon.org.uk>
On Tue, Jan 24, 2023 at 09:17:57PM +0000, David Howells wrote:
> John Hubbard <jhubbard@nvidia.com> wrote:
>
> > > + /* for now require references for all pages */
> >
> > Maybe just delete this comment?
>
> Christoph added that. Presumably because this really should move to pinning
> or be replaced with iomap, but it's not straightforward either way. Christoph?
Mostly because it adds the flag when allocating the bio, and not where
doing the gup. If John thinks it adds more confusion than it helps, we
can drop the comment.
That being said you had a conversion in an earlier version of the
series, and once the current batch of patches is in we should
resurrected it ASAP as that will allow us to kill BIO_FLAG_REFFED.
next prev parent reply other threads:[~2023-01-25 6:30 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-24 17:01 [PATCH v9 0/8] iov_iter: Improve page extraction (pin or just list) David Howells
2023-01-24 17:01 ` [PATCH v9 1/8] iov_iter: Define flags to qualify page extraction David Howells
2023-01-24 19:00 ` Christoph Hellwig
2023-01-24 19:23 ` John Hubbard
2023-01-24 17:01 ` [PATCH v9 2/8] iov_iter: Add a function to extract a page list from an iterator David Howells
2023-01-24 19:00 ` Christoph Hellwig
2023-01-24 20:50 ` John Hubbard
2023-01-24 21:10 ` David Howells
2023-01-24 17:01 ` [PATCH v9 3/8] iomap: Don't get an reference on ZERO_PAGE for direct I/O block zeroing David Howells
2023-01-24 19:01 ` Christoph Hellwig
2023-01-24 19:25 ` John Hubbard
2023-01-24 20:41 ` David Howells
2023-01-25 6:28 ` Christoph Hellwig
2023-01-24 17:01 ` [PATCH v9 4/8] block: Fix bio_flagged() so that gcc can better optimise it David Howells
2023-01-24 19:28 ` John Hubbard
2023-01-24 20:55 ` David Howells
2023-01-24 17:01 ` [PATCH v9 5/8] block: Replace BIO_NO_PAGE_REF with BIO_PAGE_REFFED with inverted logic David Howells
2023-01-24 19:01 ` Christoph Hellwig
2023-01-24 19:47 ` John Hubbard
2023-01-24 21:17 ` David Howells
2023-01-25 6:30 ` Christoph Hellwig [this message]
2023-01-24 17:01 ` [PATCH v9 6/8] block: Switch to pinning pages David Howells
2023-01-24 19:02 ` Christoph Hellwig
2023-01-24 19:50 ` John Hubbard
2023-01-24 20:59 ` David Howells
2023-01-25 6:30 ` Christoph Hellwig
2023-01-24 17:01 ` [PATCH v9 7/8] block: Convert bio_iov_iter_get_pages to use iov_iter_extract_pages David Howells
2023-01-24 19:03 ` Christoph Hellwig
2023-01-24 20:00 ` John Hubbard
2023-01-24 20:46 ` David Howells
2023-01-24 17:01 ` [PATCH v9 8/8] block: convert bio_map_user_iov " David Howells
2023-01-24 19:03 ` Christoph Hellwig
2023-01-24 20:08 ` John Hubbard
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