From: "H. Peter Anvin" <hpa@zytor.com>
To: Frank Hu <frank.hu.2001@gmail.com>
Cc: Joel Fernandes <agnel.joel@gmail.com>,
hayfeng Lee <teklife.kernel@gmail.com>,
linux-kernel@vger.kernel.org, linux-kernel@zh-kernel.org,
kernelnewbies@nl.linux.org
Subject: Re: why choose 896MB to the start point of ZONE_HIGHMEM
Date: Tue, 06 Apr 2010 13:18:51 -0700 [thread overview]
Message-ID: <4BBB972B.1030600@zytor.com> (raw)
In-Reply-To: <p2q8f84f9951004061315z7d2be34aj41b5052cf20879f3@mail.gmail.com>
On 04/06/2010 01:15 PM, Frank Hu wrote:
>
> thought that you can only configure how to split the VM like 1G/3G or
> 2G/2G. But the DMA zone size, the 128MB space for I/O is not
> configurable. The NORMAL zone size will be deducted based on the VM
> Split and some hard coded DMA zone and 128 MB space size.
>
> I am not a guru in this space... so I might be wrong.
And you are. The vmalloc zone (not DMA zone -- that's something
entirely different) is configurable via the vmalloc= kernel command line
option.
-hpa
next prev parent reply other threads:[~2010-04-06 20:28 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-06 14:37 why choose 896MB to the start point of ZONE_HIGHMEM hayfeng Lee
2010-04-06 15:02 ` Joel Fernandes
2010-04-06 18:17 ` H. Peter Anvin
2010-04-06 19:20 ` Frank Hu
2010-04-06 19:44 ` H. Peter Anvin
2010-04-06 20:01 ` Joel Fernandes
2010-04-06 20:04 ` H. Peter Anvin
[not found] ` <q2iacff6c2b1004061528t28f1337eq977aabf8fe71bc22@mail.gmail.com>
[not found] ` <3715922601579231267@unknownmsgid>
2010-04-06 23:32 ` H. Peter Anvin
2010-04-07 1:47 ` Xianghua Xiao
[not found] ` <n2uacff6c2b1004061904v5d290fa6v909e2e5fe32ff910@mail.gmail.com>
2010-04-07 2:09 ` H. Peter Anvin
[not found] ` <n2jacff6c2b1004062248w311d8482w6c64a7bdfded8385@mail.gmail.com>
2010-04-07 12:10 ` Xianghua Xiao
[not found] ` <k2z7f245da81004070550u5324f6ffyba3e996a3e292a0a@mail.gmail.com>
[not found] ` <n2kb114f3281004070948hb510b9b1o80126e2411a98c8d@mail.gmail.com>
2010-04-07 17:14 ` H. Peter Anvin
2010-04-08 2:23 ` Nobin Mathew
[not found] ` <u2o7f245da81004062105w1f7d3416n7855472d28e8bcfd@mail.gmail.com>
2010-04-07 5:28 ` H. Peter Anvin
[not found] ` <h2pacff6c2b1004062257mc8552d81u33322c43e47502c9@mail.gmail.com>
2010-04-07 6:04 ` H. Peter Anvin
[not found] ` <q2oc58e39921004062208z6410b031o8d5654a582cc2783@mail.gmail.com>
[not found] ` <t2yacff6c2b1004062309t89b6bddfy3b0cf5970846fbb0@mail.gmail.com>
2010-04-07 14:11 ` tek-life
2010-04-06 20:15 ` Frank Hu
2010-04-06 20:18 ` H. Peter Anvin [this message]
2010-04-07 12:16 ` Krzysztof Halasa
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