linux-kernel - Re: [PATCH] remove sb->s_files and file_list

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Message-ID: <Pine.LNX.4.61.0702071901150.20245@yvahk01.tjqt.qr>
Date:	Wed, 7 Feb 2007 19:03:05 +0100 (MET)
From:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
To:	Christoph Hellwig <hch@....de>
cc:	Andrew Morton <akpm@...ux-foundation.org>, jack@...e.cz,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] remove sb->s_files and file_list_lock usage in dquot.c


On Feb 7 2007 08:22, Christoph Hellwig wrote:

>> That loop has (and had) up to O(n^n) operations.  Is there something which
>> prevents this from going insane?
>
>I don't think so.  Then again it's only called when you call quotaon on
>a mounted filesystem, and normally you don't have that many inodes
>instanciated at that time.

With filesystems that can turn on their quota after mount time (about 
every fs except xfs), I can surely have a ton of files open, and hence, 
if I understand correctly, have lots of inodes instantiated.


Jan
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