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Re: %u-order allocation failed

To: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
Subject: Re: %u-order allocation failed
From: Pavel Machek <pavel@xxxxxxx>
Date: Mon, 8 Oct 2001 16:44:37 +0000
Cc: Mikulas Patocka <mikulas@xxxxxxxxxxxxxxxxxxxxxxxx>, Rik van Riel <riel@xxxxxxxxxxxxxxxx>, Krzysztof Rusocki <kszysiu@xxxxxxxxxxxxxxxxx>, linux-xfs@xxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
In-reply-to: <E15qLzV-00071D-00@the-village.bc.nu>; from alan@lxorguk.ukuu.org.uk on Sun, Oct 07, 2001 at 11:01:45PM +0100
References: <Pine.LNX.3.96.1011007173411.6774A-100000@artax.karlin.mff.cuni.cz> <E15qLzV-00071D-00@the-village.bc.nu>
Sender: owner-linux-xfs@xxxxxxxxxxx
Hi!

> > The difference between memory and vmalloc space is this: you fill up the
> > whole memory with cache => memory fragments. You don't fill up the whole
> > vmalloc space with anything => vmalloc space doesn't fragment.
> 
> vmalloc space fragments. You fragment address space rather than pages thats
> all. Same problem

vmalloc space tends to be empty while ram tends to be full. That might be
important.
                                                                Pavel

-- 
Philips Velo 1: 1"x4"x8", 300gram, 60, 12MB, 40bogomips, linux, mutt,
details at http://atrey.karlin.mff.cuni.cz/~pavel/velo/index.html.


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