linux-kernel - Re: [PATCH v12 18/20] dax: Add dax_zero_page

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Date:	Mon, 12 Jan 2015 16:20:49 -0700
From:	Ross Zwisler <ross.zwisler@...ux.intel.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Matthew Wilcox <matthew.r.wilcox@...el.com>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, willy@...ux.intel.com
Subject: Re: [PATCH v12 18/20] dax: Add dax_zero_page_range

On Mon, 2015-01-12 at 15:10 -0800, Andrew Morton wrote:
> On Fri, 24 Oct 2014 17:20:50 -0400 Matthew Wilcox <matthew.r.wilcox@...el.com> wrote:
> 
> > Signed-off-by: Matthew Wilcox <matthew.r.wilcox@...el.com>
> > [ported to 3.13-rc2]
> > Signed-off-by: Ross Zwisler <ross.zwisler@...ux.intel.com>
> 
> I never know what this means :(
> 
> I switched it to 
> 
> [ross.zwisler@...ux.intel.com: ported to 3.13-rc2]
> Signed-off-by: Matthew Wilcox <matthew.r.wilcox@...el.com>
> Signed-off-by: Ross Zwisler <ross.zwisler@...ux.intel.com>

The way that you've interpreted it is correct.  Thanks!

- Ross

> but perhaps that was wrong?
> 
> 
> 
> 
> also, coupla typos:
> 
> 
> diff -puN fs/dax.c~dax-add-dax_zero_page_range-fix fs/dax.c
> --- a/fs/dax.c~dax-add-dax_zero_page_range-fix
> +++ a/fs/dax.c
> @@ -475,7 +475,7 @@ EXPORT_SYMBOL_GPL(dax_fault);
>   * block_truncate_page(), but we could go down to PAGE_SIZE if the filesystem
>   * took care of disposing of the unnecessary blocks.  Even if the filesystem
>   * block size is smaller than PAGE_SIZE, we have to zero the rest of the page
> - * since the file might be mmaped.
> + * since the file might be mmapped.
>   */
>  int dax_zero_page_range(struct inode *inode, loff_t from, unsigned length,
>  							get_block_t get_block)
> @@ -514,13 +514,13 @@ EXPORT_SYMBOL_GPL(dax_zero_page_range);
>   * @get_block: The filesystem method used to translate file offsets to blocks
>   *
>   * Similar to block_truncate_page(), this function can be called by a
> - * filesystem when it is truncating an DAX file to handle the partial page.
> + * filesystem when it is truncating a DAX file to handle the partial page.
>   *
>   * We work in terms of PAGE_CACHE_SIZE here for commonality with
>   * block_truncate_page(), but we could go down to PAGE_SIZE if the filesystem
>   * took care of disposing of the unnecessary blocks.  Even if the filesystem
>   * block size is smaller than PAGE_SIZE, we have to zero the rest of the page
> - * since the file might be mmaped.
> + * since the file might be mmapped.
>   */
>  int dax_truncate_page(struct inode *inode, loff_t from, get_block_t get_block)
>  {
> diff -puN include/linux/fs.h~dax-add-dax_zero_page_range-fix include/linux/fs.h
> _
> 
> 
> akpm3:/usr/src/linux-3.19-rc4> grep -r mmaped .| wc -l
> 70
> akpm3:/usr/src/linux-3.19-rc4> grep -r mmapped .| wc -l 
> 107
> 
> lol.



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