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To: Mikael Karpberg <karpen@ocean.campus.luth.se>
cc: hackers@FreeBSD.ORG
Subject: Re: Optimizing bzero() 
In-reply-to: Your message of "Mon, 30 Sep 1996 10:33:14 +0200."
             <199609300833.KAA18915@ocean.campus.luth.se> 
Date: Mon, 30 Sep 1996 13:45:12 +0200
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From: Poul-Henning Kamp <phk@critter.tfs.com>
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In message <199609300833.KAA18915@ocean.campus.luth.se>, Mikael Karpberg writes
>> >
>> >phk> The next thing you could start to consider is when people realloc a
>> >phk> multipage allocation to something bigger, it would be nice to be able
>> >phk> to ask the kernel to "move these pages to this address" and then exten
>d
>> >phk> It there instead of copying the contents.
>> >
>Can't you just make realloc do that? Is there a problem with doing it?
>If not, is there a way to tell the system to rearrange your address space?

It would be done in realloc(), but the savings seems to be very marginal
from the traces I have collected so far.

--
Poul-Henning Kamp           | phk@FreeBSD.ORG       FreeBSD Core-team.
http://www.freebsd.org/~phk | phk@login.dknet.dk    Private mailbox.
whois: [PHK]                | phk@ref.tfs.com       TRW Financial Systems, Inc.
Future will arrive by its own means, progress not so.