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From: Daniel Phillips <phillips@bonn-fries.net>
To: Sven Heinicke <sven@research.nj.nec.com>, linux-kernel@vger.kernel.org
Subject: Re: Google's mm problem - not reproduced on 2.4.13
Date: Fri, 2 Nov 2001 19:57:31 +0100
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Cc: Ben Smith <ben@google.com>, Andrea Arcangeli <andrea@suse.de>,
        Rik van Riel <riel@conectiva.com.br>
In-Reply-To: <E15yzlQ-00021P-00@starship.berlin> <20011102181005Z16039-4784+415@humbolt.nl.linux.org> <15330.60050.705170.566887@abasin.nj.nec.com>
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On November 2, 2001 07:48 pm, Sven Heinicke wrote:
>  > Not freeing the memory is expected and normal.  The previously-mlocked file 
>  > data remains cached in that memory, and even though it's not free, it's 
>  > 'easily freeable' so there's no smoking gun there.  The reason the memory is 
>  > freed on umount is, there's no possibility that that file data can be 
>  > referenced again and it makes sense to free it up immediately.
> 
> That cool and all, but how to I free up the memory w/o umounting the
> partition?

You don't, that's the mm's job.  It tries to do it at the last minute, when
it's sure the memory is needed for something more important.

> Also, I just tried 2.4.14-pre7.  It acted the same way as 2.4.13 does,
> requiring the reset key to continue.

--
Daniel
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