Message-ID: <4B2AFF4C.5010100@ct.jp.nec.com>
Date: Fri, 18 Dec 2009 13:04:28 +0900
From: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
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To: Alexey Dobriyan <adobriyan@gmail.com>
CC: torvalds@linux-foundation.org, akpm@linux-foundation.org,
       linux-fsdevel <linux-fsdevel@vger.kernel.org>,
       linux-kernel@vger.kernel.org
Subject: Re: revert "config FS_JOURNAL_INFO"
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Alexey Dobriyan wrote:
> Can we please revert commit e4c570c4cb7a95dbfafa3d016d2739bf3fdfe319
> "task_struct: make journal_info conditional"

I'm fine to revert it, because it seems merged accidentally.

> 
> I think I gave a good enough arguments to not merge it.
> To iterate:
> * patch makes impossible to start using ext3 on EXT3_FS=n kernels
> without reboot.
> * this is done only for one pointer on task_struct

I don't think it's only one pointer.
There might be a lot of "only one pointer".

> 
> None of config options which define task_struct are tristate directly
> or effectively.

So we never allow to make memory usage small with providing an option
to remove unused area, right? Of cause, that option should be handled
carefully. If I want to reduce memory usage by this way, should I keep
this kind of patches out of tree?

thanks,
Hiroshi

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