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Re: Getting big areas of memory, in 2.3.x?

To: Ingo Molnar <mingo@chiara.csoma.elte.hu>
Subject: Re: Getting big areas of memory, in 2.3.x?
From: "William J. Earl" <wje@cthulhu.engr.sgi.com>
Date: Fri, 10 Dec 1999 10:04:49 -0800 (PST)
Cc: Rik van Riel <riel@nl.linux.org>, Kanoj Sarcar <kanoj@google.engr.sgi.com>, Jeff Garzik <jgarzik@mandrakesoft.com>, alan@lxorguk.ukuu.org.uk, linux-kernel@vger.rutgers.edu, linux-mm@kvack.org
In-Reply-To: <Pine.LNX.4.10.9912101437330.4472-100000@chiara.csoma.elte.hu>
References: <Pine.LNX.4.05.9912101308140.31379-100000@humbolt.nl.linux.org><Pine.LNX.4.10.9912101437330.4472-100000@chiara.csoma.elte.hu>
Sender: owner-linux-mm@kvack.org

Ingo Molnar writes:
...
 > this is possible (sans the relocation process which is a special thing
 > anyway), but why would we want to allocate large chunks of contiguous user
 > pages?
...

     To be able to use, for example, 2 or 4 MB pages on x86 to reduce
TLB thrashing (and, if the I/O path understands large pages, the software
overhead to set up large direct or raw I/O requests).

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References:
- Re: Getting big areas of memory, in 2.3.x?
  - From: Rik van Riel <riel@nl.linux.org>
- Re: Getting big areas of memory, in 2.3.x?
  - From: Ingo Molnar <mingo@chiara.csoma.elte.hu>
- Re: Getting big areas of memory, in 2.3.x?
  - From: Ingo Molnar <mingo@chiara.csoma.elte.hu>

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