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From: Richard Gooch <rgooch@ras.ucalgary.ca>
To: Gregory Maxwell <greg@linuxpower.cx>
Cc: Ingo Oeser <ingo.oeser@informatik.tu-chemnitz.de>,
	"David S. Miller" <davem@redhat.com>,
	Jeff Garzik <jgarzik@mandrakesoft.com>,
	"H. Peter Anvin" <hpa@zytor.com>,
	linux-kernel@vger.kernel.org
Subject: Re: X15 alpha release: as fast as TUX but in user space (fwd)
Date: Sun, 29 Apr 2001 13:54:24 -0600	[thread overview]
Message-ID: <200104291954.f3TJsO821517@vindaloo.ras.ucalgary.ca> (raw)
In-Reply-To: <20010429154720.B17155@xi.linuxpower.cx>
In-Reply-To: <Pine.LNX.4.33.0104281752290.10866-100000@localhost.localdomain> <20010428215301.A1052@gruyere.muc.suse.de> <200104282256.f3SMuRW15999@vindaloo.ras.ucalgary.ca> <9cg7t7$gbt$1@cesium.transmeta.com> <3AEBF782.1911EDD2@mandrakesoft.com> <15083.64180.314190.500961@pizda.ninka.net> <20010429153229.L679@nightmaster.csn.tu-chemnitz.de> <200104291848.f3TIm6821037@vindaloo.ras.ucalgary.ca> <20010429145552.A17155@xi.linuxpower.cx> <200104291902.f3TJ2Dd21232@vindaloo.ras.ucalgary.ca> <20010429154720.B17155@xi.linuxpower.cx>

Gregory Maxwell writes:
> Would it make sence to have libc use the magic page for all
> syscalls? Then on cpus with a fast syscall instruction, the magic
> page could contain the needed junk in userspace to use it.

That's pretty much what Linus suggested. He proposed having a new
syscall interface which was just calls into the magic page. All
syscalls would thus be available via the magic page. The kernel could
then selectively optimise individual syscalls (like gettimeofday(2))
or optimise the interface into kernel space, without libc ever having
to know about the details.

				Regards,

					Richard....
Permanent: rgooch@atnf.csiro.au
Current:   rgooch@ras.ucalgary.ca

  parent reply	other threads:[~2001-04-29 19:54 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-04-28 15:52 Ingo Molnar
2001-04-28 19:53 ` Andi Kleen
2001-04-28 22:56 ` Richard Gooch
2001-04-29  5:13   ` H. Peter Anvin
2001-04-29 11:14     ` Jeff Garzik
2001-04-29 16:21       ` dean gaudet
2001-04-29 20:19         ` H. Peter Anvin
2001-04-29 21:16         ` Jim Gettys
2001-04-29 21:40           ` H. Peter Anvin
2001-04-29 21:47             ` Jim Gettys
2001-05-02 18:18           ` Matti Aarnio
2001-05-02 19:34             ` Linus Torvalds
2001-05-02 20:55               ` Fabio Riccardi
2001-04-29 22:29         ` Richard Gooch
2001-04-30  7:02       ` David S. Miller
2001-04-30  7:29         ` H. Peter Anvin
2001-04-30  7:51         ` David S. Miller
2001-04-30 14:56         ` Jonathan Lundell
2001-04-29 11:27     ` David S. Miller
2001-04-29 13:32       ` Ingo Oeser
2001-04-29 18:48       ` Richard Gooch
2001-04-29 18:55         ` Gregory Maxwell
2001-04-29 19:02         ` Richard Gooch
2001-04-29 19:47           ` Gregory Maxwell
2001-04-29 19:54           ` Richard Gooch [this message]
2001-04-29 20:11         ` Ingo Oeser
2001-04-29 20:18           ` Gregory Maxwell
2001-04-30  0:13             ` Andrea Arcangeli
2001-04-29 20:45           ` Arjan van de Ven
2001-04-29 22:20           ` Richard Gooch
2001-04-30 16:46           ` Alan Cox
2001-04-29 22:18         ` Richard Gooch
2001-04-29 19:38       ` Jamie Lokier
2001-04-29 23:53         ` Andrea Arcangeli
2001-04-30  8:42     ` Pavel Machek
2001-05-03  7:13       ` Kai Henningsen
2001-05-03  7:44         ` Keith Owens
2001-05-03 10:37           ` Ingo Oeser
2001-05-03 15:44           ` Gregory Maxwell
2001-05-07 19:04           ` Pavel Machek
2001-05-03  9:37         ` Alan Cox
2001-05-07 19:03           ` vsyscalls [was Re: X15 alpha release: as fast as TUX but in user space (fwd)] Pavel Machek
2001-05-03 12:23       ` X15 alpha release: as fast as TUX but in user space (fwd) Helge Hafting
2001-05-03 19:09         ` Pavel Machek
2001-05-03 19:50           ` agrawal
2001-05-07 19:07             ` vsyscallRe: " Pavel Machek
2001-05-03 20:19           ` Alan Cox
2001-05-03 20:41             ` Gregory Maxwell
2001-05-04  8:06               ` Pavel Machek
2001-05-04 17:31                 ` dean gaudet
2001-05-04  8:43             ` bert hubert
2001-05-02 10:52   ` Andi Kleen
2001-05-02 10:53     ` Ingo Molnar

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