From: Andi Kleen <ak@muc.de>
To: Ingo Molnar <mingo@elte.hu>
Cc: linux-kernel@vger.kernel.org, kkeil@suse.de
Subject: Re: [patch] tune vmalloc size
Date: Wed, 15 Sep 2004 15:29:53 +0200 [thread overview]
Message-ID: <m34qlzbqy6.fsf@averell.firstfloor.org> (raw)
In-Reply-To: <2EHyq-5or-39@gated-at.bofh.it> (Ingo Molnar's message of "Wed, 15 Sep 2004 15:00:18 +0200")
Ingo Molnar <mingo@elte.hu> writes:
> there are a few devices that use lots of ioremap space. vmalloc space is
> a showstopper problem for them.
>
> this patch adds the vmalloc=<size> boot parameter to override
> __VMALLOC_RESERVE. The default is 128mb right now - e.g. vmalloc=256m
> doubles the size.
Ah, Karsten Keil did a similar patch some months ago. There is
clearly a need.
But I think this should be self tuning instead. For a machine with
less than 900MB of memory the vmalloc area can be automagically increased,
growing into otherwise unused address space.
This way many users wouldn't need to specify weird options. So far
most machines still don't have more than 512MB.
-Andi
next parent reply other threads:[~2004-09-15 13:39 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <2EHyq-5or-39@gated-at.bofh.it>
2004-09-15 13:29 ` Andi Kleen [this message]
2004-09-15 14:05 ` [patch] tune vmalloc size Rodrigo FGV
2004-09-15 14:12 ` Arjan van de Ven
2004-09-17 22:03 ` Chris Wedgwood
2004-09-17 22:06 ` Arjan van de Ven
2004-09-15 14:58 ` Karsten Keil
2004-09-15 15:07 ` Martin J. Bligh
2004-09-15 12:53 Ingo Molnar
2004-09-15 12:31 ` Alan Cox
2004-09-15 13:29 ` Joe Korty
2004-09-15 13:31 ` Arjan van de Ven
2004-09-15 13:40 ` Joe Korty
2004-09-15 14:14 ` Dave Jones
2004-09-15 13:40 ` Dave Jones
2004-09-15 21:33 ` Andrew Morton
2004-09-15 21:45 ` Ingo Molnar
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