From: Jeff Dike <jdike@karaya.com>
To: Andrea Arcangeli <andrea@suse.de>
Cc: Andi Kleen <ak@muc.de>, john stultz <johnstul@us.ibm.com>,
Linus Torvalds <torvalds@transmeta.com>,
lkml <linux-kernel@vger.kernel.org>,
george anzinger <george@mvista.com>,
Stephen Hemminger <shemminger@osdl.org>,
Bill Davidsen <davidsen@tmr.com>
Subject: Re: [PATCH] linux-2.5.43_vsyscall_A0
Date: Sat, 19 Oct 2002 18:43:28 -0500 [thread overview]
Message-ID: <200210192343.SAA03642@ccure.karaya.com> (raw)
In-Reply-To: Your message of "Sat, 19 Oct 2002 07:01:39 +0200." <20021019050139.GM23930@dualathlon.random>
andrea@suse.de said:
> the sysctl would replace the vsyscall fixmap fixmap entry for the
> current cpu enterely at switch_to time, I certainly don't want to add
> not necessary branches in the core vsyscall code. Doing it globally
> is zerocost but it would probably need privilegies as said, per-task
> could be more dynamic without privilegies and it would be an unlikely
> branch added in switch_to, still a very low cost so still acceptable.
If I'm understanding this (and reading the code) correctly, this would
allow UML to specify that, for a given process, it should have a page of
its choosing mapped into the vsyscall area. Correct?
If so, I can go along with this. It makes vsyscalls virtualizable, and thus
available to UML, which needs them more than the other arches :-)
The one suggestion I'd make is to make it per-mm rather than per-task and
put it in switch_mm rather than switch_to.
Jeff
next prev parent reply other threads:[~2002-10-19 22:33 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-18 22:57 john stultz
2002-10-18 22:58 ` [EXAMPLE CODE] linux-2.5.43_vsyscall_A0 john stultz
2002-10-19 3:52 ` [PATCH] linux-2.5.43_vsyscall_A0 Jeff Dike
2002-10-19 3:10 ` Andi Kleen
2002-10-19 4:49 ` Jeff Dike
2002-10-19 4:02 ` Andi Kleen
2002-10-19 4:16 ` Andrea Arcangeli
2002-10-20 2:59 ` Andi Kleen
2002-10-20 6:44 ` Elladan
2002-10-20 9:27 ` [discuss] " Andi Kleen
2002-10-20 10:58 ` Elladan
2002-10-20 11:20 ` Andi Kleen
2002-10-20 14:51 ` Andrea Arcangeli
2002-10-21 16:49 ` george anzinger
2002-10-20 13:19 ` Andreas Jaeger
2002-10-20 14:59 ` Andrea Arcangeli
2002-10-19 4:10 ` Andrea Arcangeli
2002-10-19 4:45 ` Andi Kleen
2002-10-19 5:01 ` Andrea Arcangeli
2002-10-19 23:43 ` Jeff Dike [this message]
2002-10-20 0:15 ` Andrea Arcangeli
2002-10-20 2:03 ` Jeff Dike
2002-10-20 2:33 ` Andrea Arcangeli
2002-10-22 5:07 ` Jeff Dike
2002-10-22 4:15 ` Andi Kleen
2002-10-22 4:29 ` Andrew Morton
2002-10-22 9:39 ` Alan Cox
2002-10-22 16:12 ` Andrew Morton
2002-10-22 5:08 ` Andrea Arcangeli
2002-10-22 5:27 ` Andrea Arcangeli
2002-10-22 7:24 ` Elladan
2002-10-22 7:40 ` Andrea Arcangeli
2002-10-23 5:12 ` Elladan
2002-10-23 5:43 ` Elladan
2002-10-23 17:51 ` Gerrit Huizenga
2002-10-21 15:43 ` Stephen Hemminger
2002-10-21 16:26 ` Andi Kleen
2002-10-21 17:10 ` john stultz
2002-10-19 19:14 ` Bill Davidsen
2002-10-20 1:50 ` Rik van Riel
2002-10-20 2:56 ` Andi Kleen
2002-10-24 11:24 ` Pavel Machek
2002-10-24 11:24 ` Pavel Machek
2002-10-19 22:36 ` Ton Hospel
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=200210192343.SAA03642@ccure.karaya.com \
--to=jdike@karaya.com \
--cc=ak@muc.de \
--cc=andrea@suse.de \
--cc=davidsen@tmr.com \
--cc=george@mvista.com \
--cc=johnstul@us.ibm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=shemminger@osdl.org \
--cc=torvalds@transmeta.com \
/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
Powered by JetHome