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From: Hans Reiser <reiser@namesys.com>
To: Jan Engelhardt <jengelh@linux01.gwdg.de>
Cc: linux-kernel@vger.kernel.org, Vladimir Demidov <demidov@namesys.com>
Subject: Re: readdir loses renamed files
Date: Sun, 31 Oct 2004 21:38:36 -0800	[thread overview]
Message-ID: <4185CBDC.6090502@namesys.com> (raw)
In-Reply-To: <Pine.LNX.4.53.0410310726060.3581@yvahk01.tjqt.qr>

Jan Engelhardt wrote:

>>>>It should be possible to perform an atomic readdir if that is what you
>>>>want to do and if you have space in your process to stuff the result.
>>>>        
>>>>
>>>How much would it cost to always append the new name into the directory rather
>>>than modifying it in place?
>>>      
>>>
>>Forgive me, what does the sentence above mean?  Paste it out of order?
>>    
>>
>
>As I have read from earlier replies, ext2/3 replaces a filename with the new
>one, given that it is the same length or shorter, and especially that might
>skip a while when readdir()ing.
>So I was concerned about the speed impact which would arise, if the filename
>was never modified in-place but always appended as a new object to the
>end-of-directory.
>
>
>
>Jan Engelhardt
>  
>
The api is fundamentally broken.  Sorry.   Will try to avoid making that 
mistake in sys_reiser4.

  reply	other threads:[~2004-11-01  5:38 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-10-25  1:21 Timo Sirainen
2004-10-25  8:29 ` Chris Wedgwood
2004-10-25 12:35   ` Timo Sirainen
2004-10-25 12:47     ` Jan Engelhardt
2004-10-25 12:37 ` Theodore Ts'o
2004-10-25 13:22   ` Timo Sirainen
2004-10-28  9:34   ` Matthias Andree
2004-10-28 11:44     ` Andreas Dilger
2004-10-28 14:34       ` Jan Engelhardt
2004-10-28 15:41       ` Matthias Andree
2004-10-29 21:15       ` Hans Reiser
2004-10-29 21:28         ` Jan Engelhardt
2004-10-30 19:11           ` Hans Reiser
2004-10-31  6:32             ` Jan Engelhardt
2004-11-01  5:38               ` Hans Reiser [this message]
2004-10-28 17:06     ` Theodore Ts'o
2004-10-28 19:00       ` Bernd Eckenfels

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