From: Matthew Wilcox <willy@linux.intel.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Matthew Wilcox <matthew.r.wilcox@intel.com>,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, willy@linux.intel.com
Subject: Re: [PATCH v12 09/20] dax,ext2: Replace xip_truncate_page with dax_truncate_page
Date: Tue, 13 Jan 2015 16:55:05 -0500 [thread overview]
Message-ID: <20150113215505.GL5661@wil.cx> (raw)
In-Reply-To: <20150112150958.2e6bd85dc3e25b953d28c6cb@linux-foundation.org>
On Mon, Jan 12, 2015 at 03:09:58PM -0800, Andrew Morton wrote:
> > + * 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.
> > + *
> > + * 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.
>
> But PAGE_SIZE==PAGE_CACHE_SIZE. Unclear what you're saying here.
The last I heard, some people were trying to resurrect the PAGE_CACHE_SIZE
> PAGE_SIZE patches. I'd be grateful if the distinction between PAGE_SIZE
and PAGE_CACHE_SIZE went away, tbh.
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WARNING: multiple messages have this Message-ID (diff)
From: Matthew Wilcox <willy@linux.intel.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Matthew Wilcox <matthew.r.wilcox@intel.com>,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, willy@linux.intel.com
Subject: Re: [PATCH v12 09/20] dax,ext2: Replace xip_truncate_page with dax_truncate_page
Date: Tue, 13 Jan 2015 16:55:05 -0500 [thread overview]
Message-ID: <20150113215505.GL5661@wil.cx> (raw)
In-Reply-To: <20150112150958.2e6bd85dc3e25b953d28c6cb@linux-foundation.org>
On Mon, Jan 12, 2015 at 03:09:58PM -0800, Andrew Morton wrote:
> > + * 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.
> > + *
> > + * 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.
>
> But PAGE_SIZE==PAGE_CACHE_SIZE. Unclear what you're saying here.
The last I heard, some people were trying to resurrect the PAGE_CACHE_SIZE
> PAGE_SIZE patches. I'd be grateful if the distinction between PAGE_SIZE
and PAGE_CACHE_SIZE went away, tbh.
next prev parent reply other threads:[~2015-01-13 21:55 UTC|newest]
Thread overview: 119+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-24 21:20 [PATCH v12 00/20] DAX: Page cache bypass for filesystems on memory storage Matthew Wilcox
2014-10-24 21:20 ` Matthew Wilcox
2014-10-24 21:20 ` [PATCH v12 01/20] axonram: Fix bug in direct_access Matthew Wilcox
2014-10-24 21:20 ` Matthew Wilcox
2014-10-24 21:20 ` [PATCH v12 02/20] block: Change direct_access calling convention Matthew Wilcox
2014-10-24 21:20 ` Matthew Wilcox
2014-10-24 21:20 ` [PATCH v12 03/20] mm: Fix XIP fault vs truncate race Matthew Wilcox
2014-10-24 21:20 ` Matthew Wilcox
2015-01-12 23:09 ` Andrew Morton
2015-01-12 23:09 ` Andrew Morton
2015-01-13 18:50 ` Matthew Wilcox
2015-01-13 18:50 ` Matthew Wilcox
2014-10-24 21:20 ` [PATCH v12 04/20] mm: Allow page fault handlers to perform the COW Matthew Wilcox
2014-10-24 21:20 ` Matthew Wilcox
2015-01-12 23:09 ` Andrew Morton
2015-01-12 23:09 ` Andrew Morton
2015-01-13 18:58 ` Matthew Wilcox
2015-01-13 18:58 ` Matthew Wilcox
2015-02-05 9:16 ` Yigal Korman
2015-02-05 9:16 ` Yigal Korman
2015-02-05 21:39 ` Matthew Wilcox
2015-02-05 21:39 ` Matthew Wilcox
2015-02-08 11:48 ` Yigal Korman
2015-02-08 11:48 ` Yigal Korman
2014-10-24 21:20 ` [PATCH v12 05/20] vfs,ext2: Introduce IS_DAX(inode) Matthew Wilcox
2014-10-24 21:20 ` Matthew Wilcox
2014-10-24 21:20 ` [PATCH v12 06/20] dax,ext2: Replace XIP read and write with DAX I/O Matthew Wilcox
2014-10-24 21:20 ` Matthew Wilcox
2015-01-12 23:09 ` Andrew Morton
2015-01-12 23:09 ` Andrew Morton
2015-01-13 20:59 ` Matthew Wilcox
2015-01-13 20:59 ` Matthew Wilcox
2014-10-24 21:20 ` [PATCH v12 07/20] dax,ext2: Replace ext2_clear_xip_target with dax_clear_blocks Matthew Wilcox
2014-10-24 21:20 ` Matthew Wilcox
2015-01-12 23:09 ` Andrew Morton
2015-01-12 23:09 ` Andrew Morton
2015-01-13 21:39 ` Matthew Wilcox
2015-01-13 21:39 ` Matthew Wilcox
2014-10-24 21:20 ` [PATCH v12 08/20] dax,ext2: Replace the XIP page fault handler with the DAX page fault handler Matthew Wilcox
2014-10-24 21:20 ` Matthew Wilcox
2015-01-12 23:09 ` Andrew Morton
2015-01-12 23:09 ` Andrew Morton
2015-01-13 21:53 ` Matthew Wilcox
2015-01-13 21:53 ` Matthew Wilcox
2015-01-13 22:47 ` Andrew Morton
2015-01-13 22:47 ` Andrew Morton
2014-10-24 21:20 ` [PATCH v12 09/20] dax,ext2: Replace xip_truncate_page with dax_truncate_page Matthew Wilcox
2014-10-24 21:20 ` Matthew Wilcox
2015-01-12 23:09 ` Andrew Morton
2015-01-12 23:09 ` Andrew Morton
2015-01-13 21:55 ` Matthew Wilcox [this message]
2015-01-13 21:55 ` Matthew Wilcox
2014-10-24 21:20 ` [PATCH v12 10/20] dax: Replace XIP documentation with DAX documentation Matthew Wilcox
2014-10-24 21:20 ` Matthew Wilcox
2015-01-12 23:10 ` Andrew Morton
2015-01-12 23:10 ` Andrew Morton
2016-01-21 18:38 ` Jared Hulbert
2016-01-21 18:38 ` Jared Hulbert
2016-01-22 13:07 ` Wilcox, Matthew R
2016-01-22 13:48 ` Chris Brandt
2016-01-22 14:39 ` Matthew Wilcox
2016-01-22 14:39 ` Matthew Wilcox
2016-01-24 9:03 ` Jared Hulbert
2016-01-24 9:03 ` Jared Hulbert
2016-01-25 16:52 ` Matthew Wilcox
2016-01-25 16:52 ` Matthew Wilcox
2016-01-25 21:18 ` Jared Hulbert
2016-01-25 21:18 ` Jared Hulbert
2016-01-27 19:51 ` Jared Hulbert
2016-01-27 19:51 ` Jared Hulbert
2014-10-24 21:20 ` [PATCH v12 11/20] vfs: Remove get_xip_mem Matthew Wilcox
2014-10-24 21:20 ` Matthew Wilcox
2014-10-24 21:20 ` [PATCH v12 12/20] ext2: Remove ext2_xip_verify_sb() Matthew Wilcox
2014-10-24 21:20 ` Matthew Wilcox
2014-10-24 21:20 ` [PATCH v12 13/20] ext2: Remove ext2_use_xip Matthew Wilcox
2014-10-24 21:20 ` Matthew Wilcox
2014-10-24 21:20 ` [PATCH v12 14/20] ext2: Remove xip.c and xip.h Matthew Wilcox
2014-10-24 21:20 ` Matthew Wilcox
2014-10-24 21:20 ` [PATCH v12 15/20] vfs,ext2: Remove CONFIG_EXT2_FS_XIP and rename CONFIG_FS_XIP to CONFIG_FS_DAX Matthew Wilcox
2014-10-24 21:20 ` Matthew Wilcox
2014-10-24 21:20 ` [PATCH v12 16/20] ext2: Remove ext2_aops_xip Matthew Wilcox
2014-10-24 21:20 ` Matthew Wilcox
2014-10-24 21:20 ` [PATCH v12 17/20] ext2: Get rid of most mentions of XIP in ext2 Matthew Wilcox
2014-10-24 21:20 ` Matthew Wilcox
2014-10-24 21:20 ` [PATCH v12 18/20] dax: Add dax_zero_page_range Matthew Wilcox
2014-10-24 21:20 ` Matthew Wilcox
2015-01-12 23:10 ` Andrew Morton
2015-01-12 23:10 ` Andrew Morton
2015-01-12 23:20 ` Ross Zwisler
2015-01-12 23:20 ` Ross Zwisler
2014-10-24 21:20 ` [PATCH v12 19/20] ext4: Add DAX functionality Matthew Wilcox
2014-10-24 21:20 ` Matthew Wilcox
2014-10-24 21:20 ` [PATCH v12 20/20] brd: Rename XIP to DAX Matthew Wilcox
2014-10-24 21:20 ` Matthew Wilcox
2014-12-10 14:03 ` [PATCH v12 00/20] DAX: Page cache bypass for filesystems on memory storage Christoph Hellwig
2014-12-10 14:03 ` Christoph Hellwig
2014-12-10 14:12 ` Matthew Wilcox
2014-12-10 14:12 ` Matthew Wilcox
2014-12-10 14:28 ` Jeff Moyer
2014-12-10 14:28 ` Jeff Moyer
2014-12-10 20:53 ` Dave Chinner
2014-12-10 20:53 ` Dave Chinner
2015-01-05 18:41 ` Christoph Hellwig
2015-01-05 18:41 ` Christoph Hellwig
2015-01-06 8:47 ` Andrew Morton
2015-01-06 8:47 ` Andrew Morton
2015-01-08 11:49 ` pread2/ pwrite2 Christoph Hellwig
2015-01-08 11:49 ` Christoph Hellwig
2015-01-09 19:30 ` Steve French
2015-01-09 19:30 ` Steve French
2015-01-08 16:27 ` [PATCH v12 00/20] DAX: Page cache bypass for filesystems on memory storage Milosz Tanski
2015-01-08 16:28 ` Milosz Tanski
2015-01-08 16:28 ` Milosz Tanski
2015-01-08 17:36 ` Jeremy Allison
2015-01-08 17:36 ` Jeremy Allison
2015-01-12 14:47 ` Matthew Wilcox
2015-01-12 14:47 ` Matthew Wilcox
2015-01-12 23:09 ` Andrew Morton
2015-01-12 23:09 ` Andrew Morton
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