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$bb3147ab@amer.cisco.com>
By author: "Hua Zhong" <hzhong@cisco.com>
In newsgroup: linux.dev.kernel
>
> In the final system we are going to turn off swap. I had dreamed that Linux
> could directly use the page frame on the RAM disk instead of doing another
> copy :-)
>
However, the reply you got was completely irrelevant; he didn't answer
your question at all (even though he probably thought.)
The answer to your question is that a ramdisk lives directly in the
block cache and does not have to be copied.
You may want to consider migrating to a ramfs or tmpfs, which lives
directly in the *page* cache and therefore reduces overhead further.
-hpa
--
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt <amsp@zytor.com>
next prev parent reply other threads:[~2002-02-28 23:53 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-02-28 19:51 question about running program from a RAM disk Hua Zhong
2002-02-28 22:12 ` Richard B. Johnson
2002-02-28 22:24 ` Hua Zhong
2002-02-28 22:55 ` Oliver Neukum
2002-02-28 23:48 ` H. Peter Anvin [this message]
2002-03-01 1:40 ` Scott Murray
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='a5mfka$jgl$1@cesium.transmeta.com' \
--to=hpa@zytor.com \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox