From: Pavel Machek <pavel@ucw.cz>
To: Matthew Wilcox <matthew.r.wilcox@intel.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-fsdevel@vger.kernel.org, willy@linux.intel.com
Subject: Re: [PATCH v6 00/22] Support ext4 on NV-DIMMs
Date: Sun, 2 Mar 2014 09:22:00 +0100 [thread overview]
Message-ID: <20140302082159.GA27716@amd.pavel.ucw.cz> (raw)
In-Reply-To: <1393337918-28265-1-git-send-email-matthew.r.wilcox@intel.com>
On Tue 2014-02-25 09:18:16, Matthew Wilcox wrote:
> One of the primary uses for NV-DIMMs is to expose them as a block device
> and use a filesystem to store files on the NV-DIMM. While that works,
> it currently wastes memory and CPU time buffering the files in the page
> cache. We have support in ext2 for bypassing the page cache, but it
> has some races which are unfixable in the current design. This series
> of patches rewrite the underlying support, and add support for direct
> access to ext4.
>
> This iteration of the patchset renames the "XIP" support to "DAX".
> This fixes the confusion between kernel XIP and filesystem XIP. It's not
> really about executing in-place; it's about direct access to memory-like
> storage, bypassing the page cache. DAX is TLA-compliant, retains the
> exciting X, is pronouncable ("Dacks") and is not used elsewhere in
> the kernel. The only major use of DAX outside the kernel is the German
> stock exchange, and I think that's pretty unlikely to cause
> confusion.
It is TLA compliant, but not widely understood, and probably not
googleable. Could we perhaps use some longer name for a while?
> create mode 100644 Documentation/filesystems/dax.txt
Its not like filename can't be longer than 3.3, you see?
Pavel
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next prev parent reply other threads:[~2014-03-02 8:22 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-25 14:18 Matthew Wilcox
2014-02-25 14:18 ` [PATCH v6 01/22] Fix XIP fault vs truncate race Matthew Wilcox
2014-02-25 14:18 ` [PATCH v6 02/22] Allow page fault handlers to perform the COW Matthew Wilcox
2014-02-25 14:18 ` [PATCH v6 03/22] axonram: Fix bug in direct_access Matthew Wilcox
2014-02-25 14:18 ` [PATCH v6 04/22] Change direct_access calling convention Matthew Wilcox
2014-02-25 14:18 ` [PATCH v6 05/22] Introduce IS_DAX(inode) Matthew Wilcox
2014-02-25 14:18 ` [PATCH v6 06/22] Replace XIP read and write with DAX I/O Matthew Wilcox
2014-03-11 0:32 ` Toshi Kani
2014-03-11 12:53 ` Matthew Wilcox
2014-02-25 14:18 ` [PATCH v6 07/22] Replace the XIP page fault handler with the DAX page fault handler Matthew Wilcox
2014-02-28 17:49 ` Toshi Kani
2014-02-28 20:20 ` Matthew Wilcox
2014-02-28 22:18 ` Toshi Kani
2014-03-02 23:30 ` Dave Chinner
2014-03-03 23:07 ` Ross Zwisler
2014-03-04 0:56 ` Dave Chinner
2014-03-20 19:38 ` Matthew Wilcox
2014-03-20 23:55 ` Dave Chinner
2014-02-25 14:18 ` [PATCH v6 08/22] Replace xip_truncate_page with dax_truncate_page Matthew Wilcox
2014-02-25 14:18 ` [PATCH v6 09/22] Remove mm/filemap_xip.c Matthew Wilcox
2014-02-25 14:18 ` [PATCH v6 10/22] Remove get_xip_mem Matthew Wilcox
2014-02-25 14:18 ` [PATCH v6 11/22] Replace ext2_clear_xip_target with dax_clear_blocks Matthew Wilcox
2014-02-25 14:18 ` [PATCH v6 12/22] ext2: Remove ext2_xip_verify_sb() Matthew Wilcox
2014-02-25 14:18 ` [PATCH v6 13/22] ext2: Remove ext2_use_xip Matthew Wilcox
2014-02-25 14:18 ` [PATCH v6 14/22] ext2: Remove xip.c and xip.h Matthew Wilcox
2014-02-25 14:18 ` [PATCH v6 15/22] Remove CONFIG_EXT2_FS_XIP and rename CONFIG_FS_XIP to CONFIG_FS_DAX Matthew Wilcox
2014-02-25 14:18 ` [PATCH v6 16/22] ext2: Remove ext2_aops_xip Matthew Wilcox
2014-02-25 14:18 ` [PATCH v6 17/22] Get rid of most mentions of XIP in ext2 Matthew Wilcox
2014-02-25 14:18 ` [PATCH v6 18/22] xip: Add xip_zero_page_range Matthew Wilcox
2014-02-25 14:18 ` [PATCH v6 19/22] ext4: Make ext4_block_zero_page_range static Matthew Wilcox
2014-02-25 14:18 ` [PATCH v6 20/22] ext4: Add DAX functionality Matthew Wilcox
2014-02-25 14:18 ` [PATCH v6 21/22] ext4: Fix typos Matthew Wilcox
2014-02-25 14:18 ` [PATCH v6 22/22] dax: Add reporting of major faults Matthew Wilcox
2014-02-26 15:07 ` [PATCH v6 23/22] Bugfixes Matthew Wilcox
2014-02-27 14:01 ` [PATCH v6 00/22] Support ext4 on NV-DIMMs Florian Weimer
2014-02-27 16:29 ` Matthew Wilcox
2014-02-27 16:36 ` Florian Weimer
2014-03-02 8:22 ` Pavel Machek [this message]
[not found] ` <CF4DEE22.25C8F%matthew.r.wilcox@intel.com>
2014-03-18 18:45 ` [PATCH v6 20/22] ext4: Add DAX functionality Ross Zwisler
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