From: "H. Peter Anvin" <hpa@zytor.com>
To: linux-kernel@vger.kernel.org
Subject: Re: question about running program from a RAM disk
Date: 28 Feb 2002 15:48:26 -0800 [thread overview]
Message-ID: <a5mfka$jgl$1@cesium.transmeta.com> (raw)
In-Reply-To: <Pine.LNX.3.95.1020228170705.2670A-100000@chaos.analogic.com> <01bc01c1c0a6$a3c315e0$bb3147ab@amer.cisco.com>
Followup to: <01bc01c1c0a6$a3c315e0$bb3147ab@amer.cisco.com>
By author: "Hua Zhong" <hzhong@cisco.com>
In newsgroup: linux.dev.kernel
>
> In the final system we are going to turn off swap. I had dreamed that Linux
> could directly use the page frame on the RAM disk instead of doing another
> copy :-)
>
However, the reply you got was completely irrelevant; he didn't answer
your question at all (even though he probably thought.)
The answer to your question is that a ramdisk lives directly in the
block cache and does not have to be copied.
You may want to consider migrating to a ramfs or tmpfs, which lives
directly in the *page* cache and therefore reduces overhead further.
-hpa
--
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt <amsp@zytor.com>
next prev parent reply other threads:[~2002-02-28 23:53 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-02-28 19:51 question about running program from a RAM disk Hua Zhong
2002-02-28 22:12 ` Richard B. Johnson
2002-02-28 22:24 ` Hua Zhong
2002-02-28 22:55 ` Oliver Neukum
2002-02-28 23:48 ` H. Peter Anvin [this message]
2002-03-01 1:40 ` Scott Murray
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