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

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Message-ID: <20090530113724.GA1444@ucw.cz>
Date:	Sat, 30 May 2009 13:37:24 +0200
From:	Pavel Machek <pavel@....cz>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Michael Shields <mshields@...gle.com>, rdunlap@...otime.net,
	linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
	trivial@...nel.org
Subject: Re: [PATCH] Doc fix: ext2 can only have 32,000 subdirs, not 32,768.

On Wed 2009-05-27 17:20:45, Andrew Morton wrote:
> On Mon, 18 May 2009 12:13:51 -0700
> Michael Shields <mshields@...gle.com> 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
> > --

Maybe it would be better to increase EXT2_LINK_MAX to fit the docs?

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