linux-ext4 - Re: [PATCH] Doc fix: ext2 can only have 32,000 subdirs, not 32,768.

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Message-ID: <alpine.LNX.2.00.0905271726510.13917@wotan.suse.de>
Date:	Wed, 27 May 2009 17:27:53 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Michael Shields <mshields@...gle.com>
Cc:	rdunlap@...otime.net, linux-ext4@...r.kernel.org,
	linux-kernel@...nel.org, trivial@...nel.org
Subject: Re: [PATCH] Doc fix: ext2 can only have 32,000 subdirs, not
 32,768.

On Mon, 18 May 2009, Michael Shields wrote:

> ext2.txt says that dirs can have 32,768 subdirs, but the actual value of 
> EXT2_LINK_MAX is 32000.
> 
> ext3 is the same, but the doc does not mention it.  One of ext4's 
> features is to "fix 32000 subdirectory limit".
> 
> 
> --- linux-2.6.29.3/Documentation/filesystems/ext2.txt.orig 2009-05-08 15:47:21.000000000 -0700
> +++ linux-2.6.29.3/Documentation/filesystems/ext2.txt 2009-05-18 12:03:58.000000000 -0700
> @@ -322,7 +322,7 @@ an upper limit on the block size imposed
>  so 8kB blocks are only allowed on Alpha systems (and other architectures
>  which support larger pages).
>  
> -There is an upper limit of 32768 subdirectories in a single directory.
> +There is an upper limit of 32000 subdirectories in a single directory.
>  
>  There is a "soft" upper limit of about 10-15k files in a single directory
>  with the current linear linked-list directory implementation.  This limit

I don't see this in linux-next. Could please either someone from ext[234] 
folks either merge it, or send me an Acked-by: and I will take it through 
trivial tree.

Thanks,

-- 
Jiri Kosina
SUSE Labs