From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: "Martin J. Bligh" <Martin.Bligh@us.ibm.com>,
Tom Rini <trini@kernel.crashing.org>,
Craig Arsenault <penguin@wombat.ca>
Cc: <linux-kernel@vger.kernel.org>, <linuxppc-dev@lists.linuxppc.org>
Subject: Re: consequences of lowering "MAX_LOW_MEM"?
Date: Tue, 3 Sep 2002 22:28:23 +0200 [thread overview]
Message-ID: <20020903202823.7152@192.168.4.1> (raw)
In-Reply-To: <137715274.1031128333@[10.10.2.3]>
>I think you'll find yourself with no virtual address space left to
>do vmalloc / fixmap / kmap type stuff. Or at least you would on i386,
>I presume it's the same for ppc. Sounds like you may have left
>yourself enough space for fixmap & kmap, but any calls to vmalloc
>will probably fail ?
Yes, same problem on PPC, you'll run out of virtual space quite
quickly for vmalloc and ioremap. Stuff a video board with lots
of VRAM or any PCI card exposing large MMIO regions into your
machines and it will probably not even boot.
Ben.
next prev parent reply other threads:[~2002-09-04 18:29 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-04 13:12 consequences of lowering "MAX_LOW_MEM"? Craig Arsenault
2002-09-04 14:26 ` Tom Rini
2002-09-04 15:32 ` Martin J. Bligh
2002-09-03 20:28 ` Benjamin Herrenschmidt [this message]
2002-09-04 19:02 ` Craig Arsenault
2002-09-04 20:02 ` Benjamin Herrenschmidt
2002-09-04 20:56 ` Matt Porter
2002-09-04 16:57 ` Matt Porter
2002-09-04 18:35 ` Craig Arsenault
2002-09-04 19:04 ` Matt Porter
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