Re: [PATCH 0/7] OMFS filesystem version 3

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To: Andrew Morton <akpm@...>
Cc: Miklos Szeredi <miklos@...>, <dwmw2@...>, <hch@...>, <me@...>, <linux-kernel@...>, <linux-fsdevel@...>
Date: Monday, April 14, 2008 - 4:11 am

Hi,

On 14 Apr 2008, at 08:49, Andrew Morton wrote:

Miklos has the wrong end of the stick.  No-one has "moved" ntfs to  
fuse.  And the fuse implementation doesn't outperform the kernel  
implementation in anything at all.  However the kernel one as  
available in the kernel source tree doesn't have many write-features,  
it can only overwrite files, it cannot create/delete files, etc.  So I  
guess if you define "performance" to mean "features" then sure  
ntfsmount/ntfs-3g have more features than the public kernel driver.   
If you define "performance" to mean "speed" then no ntfsmount/ntfs-3g  
can't compare to the kernel except in very limited and meaningless  
benchmarks...

btw. even comparing features, the fuse solutions lag behind in some  
respects, e.g. no-one can "kill -9" the kernel driver leaving a  
corrupt file system on the volume (and under no-one I include the OOM  
killer for example!) and another example is that the fuse solutions  
require large amounts of ram whereas the kernel driver can happily  
function in 1MiB ram and less even as everything is in the page cache  
so it will just cause heavy paging whilst the fuse solutions just blow  
up / OOM the machine when they find a large directory and the user has  
only 32MiB ram for example...  At least I have seen reports of this on  
the mailing lists, not that I have ever cared to try.

Best regards,

	Anton
-- 
Anton Altaparmakov <aia21 at cam.ac.uk> (replace at with @)
Unix Support, Computing Service, University of Cambridge, CB2 3QH, UK
Linux NTFS maintainer, http://www.linux-ntfs.org/

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Messages in current thread:
[PATCH 0/7] OMFS filesystem version 3, Bob Copeland, (Sat Apr 12, 6:58 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Andrew Morton, (Sat Apr 12, 8:03 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Bob Copeland, (Sat Apr 12, 11:33 pm)
Re: [PATCH 0/7] OMFS filesystem version 3 , Erez Zadok, (Mon Apr 14, 11:14 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Pavel Machek, (Sun Apr 13, 6:00 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Alan Cox, (Sun Apr 13, 5:04 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Andrew Morton, (Sat Apr 12, 11:55 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Christoph Hellwig, (Sun Apr 13, 4:01 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Andrew Morton, (Sun Apr 13, 4:20 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Christoph Hellwig, (Sun Apr 13, 4:28 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Szabolcs Szakacsits, (Fri Apr 18, 8:46 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Enrico Weigelt, (Thu May 1, 10:45 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Miklos Szeredi, (Sun Apr 13, 6:37 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Bob Copeland, (Sun Apr 13, 8:45 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Szabolcs Szakacsits, (Fri Apr 18, 6:30 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Bob Copeland, (Fri Apr 18, 9:51 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Szabolcs Szakacsits, (Fri Apr 18, 1:35 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Bob Copeland, (Fri Apr 18, 1:48 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Miklos Szeredi, (Fri Apr 18, 10:23 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Bob Copeland, (Fri Apr 18, 10:43 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Jamie Lokier, (Fri Apr 18, 7:52 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Miklos Szeredi, (Fri Apr 18, 8:20 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Jamie Lokier, (Fri Apr 18, 8:57 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Miklos Szeredi, (Fri Apr 18, 12:01 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Jamie Lokier, (Fri Apr 18, 12:15 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Miklos Szeredi, (Mon Apr 14, 3:35 am)
Re: [PATCH 0/7] OMFS filesystem version 3, David Woodhouse, (Sun Apr 13, 5:15 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Miklos Szeredi, (Mon Apr 14, 3:25 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Jamie Lokier, (Mon Apr 14, 5:42 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Miklos Szeredi, (Mon Apr 14, 5:58 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Jamie Lokier, (Mon Apr 14, 7:55 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Miklos Szeredi, (Mon Apr 14, 8:26 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Jamie Lokier, (Mon Apr 14, 6:35 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Miklos Szeredi, (Tue Apr 15, 7:33 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Jamie Lokier, (Tue Apr 15, 11:23 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Szabolcs Szakacsits, (Wed Apr 16, 9:08 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Jamie Lokier, (Thu Apr 17, 2:50 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Miklos Szeredi, (Thu Apr 17, 4:17 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Christoph Hellwig, (Mon Apr 14, 7:57 am)
Re: [PATCH 0/7] OMFS filesystem version 3, David Woodhouse, (Mon Apr 14, 7:05 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Miklos Szeredi, (Mon Apr 14, 8:50 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Andrew Morton, (Mon Apr 14, 3:49 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Anton Altaparmakov, (Mon Apr 14, 4:11 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Miklos Szeredi, (Mon Apr 14, 4:26 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Miklos Szeredi, (Mon Apr 14, 4:11 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Andrew Morton, (Sun Apr 13, 6:44 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Alan Cox, (Sun Apr 13, 6:49 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Andrew Morton, (Sun Apr 13, 7:10 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Adrian Bunk, (Tue Apr 15, 11:16 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Christoph Hellwig, (Tue Apr 15, 12:57 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Andrew Morton, (Tue Apr 15, 2:34 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Adrian Bunk, (Tue Apr 15, 3:24 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Andrew Morton, (Tue Apr 15, 4:11 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Adrian Bunk, (Tue Apr 15, 4:27 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Alan Cox, (Tue Apr 15, 2:53 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Andrew Morton, (Tue Apr 15, 4:02 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Alan Cox, (Tue Apr 15, 3:58 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, david m. richter, (Tue Apr 15, 5:46 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Xavier Bestel, (Mon Apr 14, 4:30 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Andrew Morton, (Mon Apr 14, 4:44 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Christoph Hellwig, (Mon Apr 14, 5:09 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Andrew Morton, (Mon Apr 14, 5:21 am)
Re: [PATCH 0/7] OMFS filesystem version 3, David Woodhouse, (Mon Apr 14, 6:09 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Andrew Morton, (Mon Apr 14, 6:22 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Christoph Hellwig, (Mon Apr 14, 7:16 am)
Re: [PATCH 0/7] OMFS filesystem version 3, David Woodhouse, (Mon Apr 14, 6:36 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Christoph Hellwig, (Mon Apr 14, 5:08 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Christoph Hellwig, (Mon Apr 14, 4:43 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Alan Cox, (Mon Apr 14, 4:16 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Christoph Hellwig, (Mon Apr 14, 4:41 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Jeff Garzik, (Mon Apr 14, 4:55 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Andrew Morton, (Mon Apr 14, 5:11 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, SL Baur, (Mon Apr 14, 7:09 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Andrew Morton, (Mon Apr 14, 7:24 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Evgeniy Polyakov, (Mon Apr 14, 6:32 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Andrew Morton, (Mon Apr 14, 7:21 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Chris Mason, (Mon Apr 14, 10:20 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Szabolcs Szakacsits, (Fri Apr 18, 9:13 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Bob Copeland, (Mon Apr 14, 12:36 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Alan Cox, (Mon Apr 14, 12:51 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Bob Copeland, (Mon Apr 14, 1:18 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Alan Cox, (Mon Apr 14, 1:22 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Andrew Morton, (Mon Apr 14, 4:36 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Bob Copeland, (Sun Apr 13, 9:32 pm)
Re: [PATCH 0/7] OMFS filesystem version 3, Andrew Morton, (Mon Apr 14, 1:48 am)
Re: [PATCH 0/7] OMFS filesystem version 3, Bob Copeland, (Sun Apr 13, 12:41 am)