linux-mm.kvack.org archive mirror
 help / color / mirror / Atom feed
From: Matthew Wilcox <willy@infradead.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH v4 09/25] mm: Add folio_index, folio_page and folio_contains
Date: Sun, 14 Mar 2021 03:45:52 +0000	[thread overview]
Message-ID: <20210314034552.GN2577561@casper.infradead.org> (raw)
In-Reply-To: <20210313123716.a4f9403e9f6ebbd719dac2a8@linux-foundation.org>

On Sat, Mar 13, 2021 at 12:37:16PM -0800, Andrew Morton wrote:
> On Fri,  5 Mar 2021 04:18:45 +0000 "Matthew Wilcox (Oracle)" <willy@infradead.org> wrote:
> > folio_index() is the equivalent of page_index() for folios.  folio_page()
> > finds the page in a folio for a page cache index.  folio_contains()
> > tells you whether a folio contains a particular page cache index.
> > 
> 
> copy-paste changelog into each function's covering comment?

Certainly.

> > +static inline struct page *folio_page(struct folio *folio, pgoff_t index)
> > +{
> > +	index -= folio_index(folio);
> > +	VM_BUG_ON_FOLIO(index >= folio_nr_pages(folio), folio);
> > +	return &folio->page + index;
> > +}
> 
> One would expect folio_page() to be the reverse of page_folio(), only
> it isn't anything like that.

It is ... but only for files.  So maybe folio_file_page()?



  reply	other threads:[~2021-03-14  3:46 UTC|newest]

Thread overview: 58+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-05  4:18 [PATCH v4 00/25] Page folios Matthew Wilcox (Oracle)
2021-03-05  4:18 ` [PATCH v4 01/25] mm: Introduce struct folio Matthew Wilcox (Oracle)
2021-03-13 20:37   ` Andrew Morton
2021-03-14  4:07     ` Matthew Wilcox
2021-03-17 17:14   ` Christoph Hellwig
2021-03-18 23:56   ` Balbir Singh
2021-03-19  1:25     ` Matthew Wilcox
2021-03-20  2:09       ` Balbir Singh
2021-03-22  2:52       ` Nicholas Piggin
2021-03-22  3:54         ` Matthew Wilcox
2021-03-05  4:18 ` [PATCH v4 02/25] mm: Add folio_pgdat and folio_zone Matthew Wilcox (Oracle)
2021-03-05  4:18 ` [PATCH v4 03/25] mm/vmstat: Add functions to account folio statistics Matthew Wilcox (Oracle)
2021-03-13 20:37   ` Andrew Morton
2021-03-14  4:11     ` Matthew Wilcox
2021-03-14  4:51       ` Andrew Morton
2021-03-17 17:16   ` Christoph Hellwig
2021-03-05  4:18 ` [PATCH v4 04/25] mm/debug: Add VM_BUG_ON_FOLIO and VM_WARN_ON_ONCE_FOLIO Matthew Wilcox (Oracle)
2021-03-05  4:18 ` [PATCH v4 05/25] mm: Add put_folio Matthew Wilcox (Oracle)
2021-03-05  4:18 ` [PATCH v4 06/25] mm: Add get_folio Matthew Wilcox (Oracle)
2021-03-05  4:18 ` [PATCH v4 07/25] mm: Create FolioFlags Matthew Wilcox (Oracle)
2021-03-15  2:24   ` Matthew Wilcox
2021-03-05  4:18 ` [PATCH v4 08/25] mm: Handle per-folio private data Matthew Wilcox (Oracle)
2021-03-17 17:20   ` Christoph Hellwig
2021-03-18 17:57     ` Matthew Wilcox
2021-03-05  4:18 ` [PATCH v4 09/25] mm: Add folio_index, folio_page and folio_contains Matthew Wilcox (Oracle)
2021-03-13 20:37   ` Andrew Morton
2021-03-14  3:45     ` Matthew Wilcox [this message]
2021-03-17 17:22     ` Christoph Hellwig
2021-03-05  4:18 ` [PATCH v4 10/25] mm/util: Add folio_mapping and folio_file_mapping Matthew Wilcox (Oracle)
2021-03-17 17:26   ` Christoph Hellwig
2021-03-05  4:18 ` [PATCH v4 11/25] mm/memcg: Add folio wrappers for various memcontrol functions Matthew Wilcox (Oracle)
2021-03-05  4:18 ` [PATCH v4 12/25] mm/filemap: Add unlock_folio Matthew Wilcox (Oracle)
2021-03-05  4:18 ` [PATCH v4 13/25] mm/filemap: Add lock_folio Matthew Wilcox (Oracle)
2021-03-05  4:18 ` [PATCH v4 14/25] mm/filemap: Add lock_folio_killable Matthew Wilcox (Oracle)
2021-03-05  4:18 ` [PATCH v4 15/25] mm/filemap: Convert lock_page_async to lock_folio_async Matthew Wilcox (Oracle)
2021-03-17 17:29   ` Christoph Hellwig
2021-03-05  4:18 ` [PATCH v4 16/25] mm/filemap: Convert end_page_writeback to end_folio_writeback Matthew Wilcox (Oracle)
2021-03-05  4:18 ` [PATCH v4 17/25] mm/filemap: Add wait_on_folio_locked & wait_on_folio_locked_killable Matthew Wilcox (Oracle)
2021-03-05  4:18 ` [PATCH v4 18/25] mm/page-writeback: Add wait_on_folio_writeback Matthew Wilcox (Oracle)
2021-03-05  4:18 ` [PATCH v4 19/25] mm/page-writeback: Add wait_for_stable_folio Matthew Wilcox (Oracle)
2021-03-05  4:18 ` [PATCH v4 20/25] mm/filemap: Convert wait_on_page_bit to wait_on_folio_bit Matthew Wilcox (Oracle)
2021-03-17 17:39   ` Christoph Hellwig
2021-03-05  4:18 ` [PATCH v4 21/25] mm/filemap: Add __lock_folio_or_retry Matthew Wilcox (Oracle)
2021-03-05  4:18 ` [PATCH v4 22/25] mm/filemap: Convert wake_up_page_bit to wake_up_folio_bit Matthew Wilcox (Oracle)
2021-03-05  4:18 ` [PATCH v4 23/25] mm/page-writeback: Convert test_clear_page_writeback to take a folio Matthew Wilcox (Oracle)
2021-03-05  4:19 ` [PATCH v4 24/25] mm/filemap: Convert page wait queues to be folios Matthew Wilcox (Oracle)
2021-03-05  4:19 ` [PATCH v4 25/25] cachefiles: Switch to wait_page_key Matthew Wilcox (Oracle)
2021-03-17 17:45   ` Christoph Hellwig
2021-03-13 20:36 ` [PATCH v4 00/25] Page folios Andrew Morton
2021-03-14  2:30   ` Matthew Wilcox
2021-03-14  3:09   ` Hugh Dickins
     [not found]     ` <20210315115501.7rmzaan2hxsqowgq@box>
2021-03-15 13:45       ` Matthew Wilcox
     [not found]       ` <YE9VLGl50hLIJHci@dhcp22.suse.cz>
2021-03-15 19:09         ` Christoph Hellwig
2021-03-15 19:40           ` Matthew Wilcox
2021-03-15 22:27             ` Dave Chinner
2021-03-17 17:48             ` Christoph Hellwig
2021-03-15 21:33         ` Andi Kleen
2021-03-19  4:01 ` Matthew Wilcox

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=20210314034552.GN2577561@casper.infradead.org \
    --to=willy@infradead.org \
    --cc=akpm@linux-foundation.org \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    /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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).