From: "H. Peter Anvin" <hpa@zytor.com>
To: mjustice@austin.rr.com
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] 1-2-3 GB
Date: Sun, 13 Jan 2002 16:03:50 -0800 [thread overview]
Message-ID: <3C422066.6040000@zytor.com> (raw)
In-Reply-To: <20020112125625.E1482@inspiron.school.suse.de> <Pine.LNX.4.21.0201121825200.1105-100000@localhost.localdomain> <a1sqd3$nc6$1@cesium.transmeta.com> <200201132309.g0DN9mma018052@sm13.texas.rr.com>
Marvin Justice wrote:
> On Sunday 13 January 2002 02:24 pm, H. Peter Anvin wrote:
>
>>By the way, expect user programs to fail due to lack of address space
>>if you only give them 1 GB of userspace. At 1 GB of userspace there
>>is *no* address space which is compatible with the normal address
>>space map available to the user process.
>>
> Actually, I think it will work for apps < `600MB since the mmap area is
> automatically adjusted to begin at PAGE_OFFSET/3.
>
As I said: At 1 GB of userspace there is *no* address space which is
compatible with the normal address space map available to the user process.
There is mmap() space, available, sure, but you can't get the same
address, even by request. Applications that care about the layout of
the address space will fail.
-hpa
next prev parent reply other threads:[~2002-01-14 0:04 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-12 5:45 [PATCH] 1-2-3 GB rwhron
2002-01-12 7:32 ` H. Peter Anvin
2002-01-12 13:17 ` Andrea Arcangeli
2002-01-12 17:26 ` Albert D. Cahalan
2002-01-12 17:42 ` Andrea Arcangeli
2002-01-12 18:28 ` Albert D. Cahalan
2002-01-12 19:07 ` BIO Usage Error or Conflicting Designs Andre Hedrick
2002-01-12 20:05 ` Jens Axboe
2002-01-13 1:15 ` Andre Hedrick
2002-01-13 12:59 ` Jens Axboe
2002-01-13 19:59 ` Andre Hedrick
2002-01-14 6:42 ` Jens Axboe
2002-01-12 20:59 ` [PATCH] 1-2-3 GB H. Peter Anvin
2002-01-12 11:56 ` Andrea Arcangeli
2002-01-12 15:50 ` rwhron
2002-01-12 19:22 ` Hugh Dickins
2002-01-12 21:02 ` Andrew Morton
2002-01-13 20:24 ` H. Peter Anvin
2002-01-13 23:11 ` Marvin Justice
2002-01-14 0:03 ` H. Peter Anvin [this message]
2002-01-14 0:46 ` Alan Cox
2002-01-14 2:21 ` Rik van Riel
2002-01-18 21:18 ` Pavel Machek
2002-01-19 0:24 ` Hugh Dickins
2002-01-12 21:41 ` rwhron
2002-01-12 22:34 ` rwhron
-- strict thread matches above, loose matches on Subject: below --
2002-01-15 14:07 rwhron
2002-01-15 17:48 ` Dave Jones
2002-01-16 2:12 ` H. Peter Anvin
2002-01-23 3:53 ` rwhron
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