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From: Matthew Wilcox <willy@infradead.org>
To: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 03/15] mm: Add file_offset_of_ helpers
Date: Fri, 4 Oct 2019 12:39:12 -0700	[thread overview]
Message-ID: <20191004193912.GP32665@bombadil.infradead.org> (raw)
In-Reply-To: <20190926140211.rm4b6yn2i5rlyvop@box>

On Thu, Sep 26, 2019 at 05:02:11PM +0300, Kirill A. Shutemov wrote:
> On Tue, Sep 24, 2019 at 05:52:02PM -0700, Matthew Wilcox wrote:
> > From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
> > 
> > The page_offset function is badly named for people reading the functions
> > which call it.  The natural meaning of a function with this name would
> > be 'offset within a page', not 'page offset in bytes within a file'.
> > Dave Chinner suggests file_offset_of_page() as a replacement function
> > name and I'm also adding file_offset_of_next_page() as a helper for the
> > large page work.  Also add kernel-doc for these functions so they show
> > up in the kernel API book.
> > 
> > page_offset() is retained as a compatibility define for now.
> 
> This should be trivial for coccinelle, right?

Yes, should be.  I'd prefer not to do conversions for now to minimise
conflicts when rebasing.

> > +static inline loff_t file_offset_of_next_page(struct page *page)
> > +{
> > +	return ((loff_t)page->index + compound_nr(page)) << PAGE_SHIFT;
> 
> Wouldn't it be more readable as
> 
> 	return file_offset_of_page(page) + page_size(page);
> 
> ?

Good idea.  I'll fix that up.

  reply	other threads:[~2019-10-04 19:39 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-25  0:51 [RFC 00/15] Large pages in the page-cache Matthew Wilcox
2019-09-25  0:52 ` [PATCH 01/15] mm: Use vm_fault error code directly Matthew Wilcox
2019-09-26 13:55   ` Kirill A. Shutemov
2019-09-25  0:52 ` [PATCH 02/15] fs: Introduce i_blocks_per_page Matthew Wilcox
2019-09-25  8:36   ` Dave Chinner
2019-10-04 19:28     ` Matthew Wilcox
2019-10-08  3:53       ` Dave Chinner
2019-09-25  0:52 ` [PATCH 03/15] mm: Add file_offset_of_ helpers Matthew Wilcox
2019-09-26 14:02   ` Kirill A. Shutemov
2019-10-04 19:39     ` Matthew Wilcox [this message]
2019-09-25  0:52 ` [PATCH 04/15] iomap: Support large pages Matthew Wilcox
2019-09-25  0:52 ` [PATCH 05/15] xfs: " Matthew Wilcox
2019-09-25  0:52 ` [PATCH 06/15] xfs: Pass a page to xfs_finish_page_writeback Matthew Wilcox
2019-09-25  0:52 ` [PATCH 07/15] mm: Make prep_transhuge_page tail-callable Matthew Wilcox
2019-09-26 14:13   ` Kirill A. Shutemov
2019-09-25  0:52 ` [PATCH 08/15] mm: Add __page_cache_alloc_order Matthew Wilcox
2019-09-26 14:15   ` Kirill A. Shutemov
2019-09-25  0:52 ` [PATCH 09/15] mm: Allow large pages to be added to the page cache Matthew Wilcox
2019-09-26 14:22   ` Kirill A. Shutemov
2019-09-25  0:52 ` [PATCH 10/15] mm: Allow find_get_page to be used for large pages Matthew Wilcox
2019-10-01 10:32   ` Kirill A. Shutemov
2019-09-25  0:52 ` [PATCH 11/15] mm: Remove hpage_nr_pages Matthew Wilcox
2019-10-01 10:35   ` Kirill A. Shutemov
2019-09-25  0:52 ` [PATCH 12/15] mm: Support removing arbitrary sized pages from mapping Matthew Wilcox
2019-10-01 10:39   ` Kirill A. Shutemov
2019-09-25  0:52 ` [PATCH 13/15] mm: Add a huge page fault handler for files Matthew Wilcox
2019-10-01 10:42   ` Kirill A. Shutemov
2019-09-25  0:52 ` [PATCH 14/15] mm: Align THP mappings for non-DAX Matthew Wilcox
2019-10-01 10:45   ` Kirill A. Shutemov
2019-10-01 11:21     ` William Kucharski
2019-10-01 11:32       ` Kirill A. Shutemov
2019-10-01 12:18         ` William Kucharski
2019-10-01 14:20           ` Kirill A. Shutemov
2019-10-01 16:08             ` William Kucharski
2019-10-02  0:15               ` Kirill A. Shutemov
2019-09-25  0:52 ` [PATCH 15/15] xfs: Use filemap_huge_fault Matthew Wilcox
     [not found] ` <20191002130753.7680-1-hdanton@sina.com>
2019-10-04 19:33   ` [PATCH 03/15] mm: Add file_offset_of_ helpers Matthew Wilcox
     [not found] ` <20191002133211.15696-1-hdanton@sina.com>
2019-10-04 19:34   ` [PATCH 04/15] iomap: Support large pages Matthew Wilcox
     [not found] ` <20191003040846.17604-1-hdanton@sina.com>
2019-10-04 19:35   ` [PATCH 06/15] xfs: Pass a page to xfs_finish_page_writeback Matthew Wilcox
     [not found] ` <20191003050859.18140-1-hdanton@sina.com>
2019-10-04 19:36   ` [PATCH 11/15] mm: Remove hpage_nr_pages Matthew Wilcox

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