Date: Mon, 13 Feb 2006 00:08:03 +0000
From: Al Viro <viro@ftp.linux.org.uk>
To: Linda Walsh <lkml@tlinx.org>
Cc: Linux-Kernel <linux-kernel@vger.kernel.org>, linux-fsdevel@vger.kernel.org
Subject: Re: max symlink = 5? ?bug? ?feature deficit?
Message-ID: <20060213000803.GY27946@ftp.linux.org.uk>
References: <43ED5A7B.7040908@tlinx.org> <20060212180601.GU27946@ftp.linux.org.uk> <43EFA63B.30907@tlinx.org> <20060212212504.GX27946@ftp.linux.org.uk> <43EFBCA9.1090501@tlinx.org>
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On Sun, Feb 12, 2006 at 02:54:33PM -0800, Linda Walsh wrote:
> Al Viro wrote:
> >Care to RTFS? I mean, really - at least to the point of seeing what's
> >involved in that recursion.
> >  
> Hmmm...that's where I got the original parameter numbers, but
> I see it's not so straightforward.  I tried a limit of
> 40, but I quickly get an OS hang when trying to reference a
> 13th link.  Twelve works at the limit, but would take more testing
> to find out the bottleneck.

Sigh...  12 works at the limit on your particular config, filesystems
being used and syscall being issued (hint: amount of stuff on stack
before we enter mutual recursion varies; so does the amount of stuff
on stack we get from function that are not part of mutual recursion,
but are called from the damn thing).
-
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