All of lore.kernel.org
 help / color / mirror / Atom feed
From: Al Viro <viro@zeniv.linux.org.uk>
To: John Hubbard <jhubbard@nvidia.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	Jens Axboe <axboe@kernel.dk>, Miklos Szeredi <miklos@szeredi.hu>,
	Christoph Hellwig <hch@infradead.org>,
	"Darrick J . Wong" <djwong@kernel.org>,
	Trond Myklebust <trond.myklebust@hammerspace.com>,
	Anna Schumaker <anna@kernel.org>, Jan Kara <jack@suse.cz>,
	Logan Gunthorpe <logang@deltatee.com>,
	linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-xfs@vger.kernel.org, linux-nfs@vger.kernel.org,
	linux-mm@kvack.org, LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 3/6] iov_iter: new iov_iter_pin_pages*() routines
Date: Sat, 27 Aug 2022 23:46:28 +0100	[thread overview]
Message-ID: <YwqexJOL9GcOKRg1@ZenIV> (raw)
In-Reply-To: <20220827083607.2345453-4-jhubbard@nvidia.com>

On Sat, Aug 27, 2022 at 01:36:04AM -0700, John Hubbard wrote:
> Provide two new wrapper routines that are intended for user space pages
> only:
> 
>     iov_iter_pin_pages()
>     iov_iter_pin_pages_alloc()
> 
> Internally, these routines call pin_user_pages_fast(), instead of
> get_user_pages_fast().
> 
> As always, callers must use unpin_user_pages() or a suitable FOLL_PIN
> variant, to release the pages, if they actually were acquired via
> pin_user_pages_fast().
> 
> This is a prerequisite to converting bio/block layers over to use
> pin_user_pages_fast().

You do realize that O_DIRECT on ITER_BVEC is possible, right?

  reply	other threads:[~2022-08-27 22:46 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-08-27  8:36 [PATCH 0/6] convert most filesystems to pin_user_pages_fast() John Hubbard
2022-08-27  8:36 ` [PATCH 1/6] mm/gup: introduce pin_user_page() John Hubbard
2022-08-29 12:07   ` David Hildenbrand
2022-08-29 19:33     ` John Hubbard
2022-08-30 12:17       ` David Hildenbrand
2022-08-30 21:42         ` John Hubbard
2022-08-31  0:06         ` John Hubbard
2022-08-27  8:36 ` [PATCH 2/6] block: add dio_w_*() wrappers for pin, unpin user pages John Hubbard
2022-08-27 22:27   ` Andrew Morton
2022-08-27 23:59     ` John Hubbard
2022-08-28  0:12       ` Andrew Morton
2022-08-28  0:31         ` John Hubbard
2022-08-28  1:07           ` John Hubbard
2022-08-27  8:36 ` [PATCH 3/6] iov_iter: new iov_iter_pin_pages*() routines John Hubbard
2022-08-27 22:46   ` Al Viro [this message]
2022-08-27 22:48     ` John Hubbard
2022-08-27  8:36 ` [PATCH 4/6] block, bio, fs: convert most filesystems to pin_user_pages_fast() John Hubbard
2022-08-27  8:36 ` [PATCH 5/6] NFS: direct-io: convert to FOLL_PIN pages John Hubbard
2022-08-27 22:48   ` Al Viro
2022-08-27 23:55     ` John Hubbard
2022-08-28  0:38       ` Al Viro
2022-08-28  0:39         ` Al Viro
2022-08-28  0:46           ` John Hubbard
2022-08-29  4:59           ` John Hubbard
2022-08-29 16:08             ` Jan Kara
2022-08-29 19:59               ` John Hubbard
2022-08-31  9:43                 ` Jan Kara
2022-08-31 18:02                   ` John Hubbard
2022-09-01  0:38                   ` Al Viro
2022-09-01  9:06                     ` Jan Kara
2022-08-27  8:36 ` [PATCH 6/6] fuse: convert direct IO paths to use FOLL_PIN John Hubbard

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=YwqexJOL9GcOKRg1@ZenIV \
    --to=viro@zeniv.linux.org.uk \
    --cc=akpm@linux-foundation.org \
    --cc=anna@kernel.org \
    --cc=axboe@kernel.dk \
    --cc=djwong@kernel.org \
    --cc=hch@infradead.org \
    --cc=jack@suse.cz \
    --cc=jhubbard@nvidia.com \
    --cc=linux-block@vger.kernel.org \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=linux-nfs@vger.kernel.org \
    --cc=linux-xfs@vger.kernel.org \
    --cc=logang@deltatee.com \
    --cc=miklos@szeredi.hu \
    --cc=trond.myklebust@hammerspace.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.