From: Andi Kleen <andi@firstfloor.org>
To: Avi Kivity <avi@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>,
Alexander van Heukelum <heukelum@fastmail.fm>,
lguest@ozlabs.org, jeremy@xensource.com,
LKML <linux-kernel@vger.kernel.org>, Mike Travis <travis@sgi.com>,
Cyrill Gorcunov <gorcunov@gmail.com>,
Steven Rostedt <srostedt@redhat.com>,
Andi Kleen <andi@firstfloor.org>, Ingo Molnar <mingo@elte.hu>,
Alexander van Heukelum <heukelum@mailshack.com>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [Lguest] [PATCH RFC/RFB] x86_64, i386: interrupt dispatch changes
Date: Thu, 27 Nov 2008 11:56:35 +0100 [thread overview]
Message-ID: <20081127105635.GG6703@one.firstfloor.org> (raw)
In-Reply-To: <492E72D7.9060201@redhat.com>
On Thu, Nov 27, 2008 at 12:13:43PM +0200, Avi Kivity wrote:
> H. Peter Anvin wrote:
> >
> >>I suspect we could get it down to three bytes, by sharing the last
> >>byte of the four-byte call sequence with the first byte of the next:
> >>
> >> 66 e8 ff 66 e8 fc 66 e8 f9 66 e8 f6 ...
> >>
> >>Every three bytes a new stub begins; it's a four-byte call to offset
> >>0x6703 relative to the beginning of the first stub.
> >>
> >>Can anyone better 24 bits/stub?
> >
> >On the entirely silly level...
> >
> >CC xx
>
> Nice. Can actually go to zero, by pointing the IDT at (unmapped_area +
> vector), and deducing the vector in the page fault handler from cr2.
That would be still one byte, otherwise you wouldn't get a unique index.
-Andi
--
ak@linux.intel.com
next prev parent reply other threads:[~2008-11-27 10:57 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-04 12:28 [PATCH RFC/RFB] x86_64, i386: interrupt dispatch changes Alexander van Heukelum
2008-11-04 12:42 ` Ingo Molnar
2008-11-04 13:29 ` Alexander van Heukelum
2008-11-04 14:00 ` Ingo Molnar
2008-11-04 16:23 ` Alexander van Heukelum
2008-11-04 16:47 ` Cyrill Gorcunov
2008-11-04 16:58 ` Ingo Molnar
2008-11-04 17:13 ` Cyrill Gorcunov
2008-11-04 17:29 ` Alexander van Heukelum
2008-11-06 9:19 ` Ingo Molnar
2008-11-04 20:02 ` Jeremy Fitzhardinge
2008-11-04 20:15 ` H. Peter Anvin
2008-11-04 20:02 ` Jeremy Fitzhardinge
2008-11-04 15:07 ` Cyrill Gorcunov
2008-11-04 15:47 ` Alexander van Heukelum
2008-11-04 16:36 ` Ingo Molnar
2008-11-04 16:45 ` Alexander van Heukelum
2008-11-04 16:54 ` Ingo Molnar
2008-11-04 16:55 ` Ingo Molnar
2008-11-04 16:58 ` Alexander van Heukelum
2008-11-04 17:39 ` Alexander van Heukelum
2008-11-04 17:05 ` Andi Kleen
2008-11-04 18:06 ` Alexander van Heukelum
2008-11-04 18:14 ` H. Peter Anvin
2008-11-04 18:44 ` Alexander van Heukelum
2008-11-04 19:07 ` H. Peter Anvin
2008-11-04 19:33 ` H. Peter Anvin
2008-11-04 20:06 ` Jeremy Fitzhardinge
2008-11-04 20:30 ` Andi Kleen
2008-11-04 20:26 ` H. Peter Anvin
2008-11-04 20:46 ` Andi Kleen
2008-11-04 20:44 ` Ingo Molnar
2008-11-04 21:06 ` Andi Kleen
2008-11-05 0:42 ` Jeremy Fitzhardinge
2008-11-05 0:50 ` H. Peter Anvin
2008-11-06 9:15 ` Ingo Molnar
2008-11-06 9:25 ` H. Peter Anvin
2008-11-06 9:30 ` Ingo Molnar
2008-11-05 10:26 ` Ingo Molnar
2008-11-14 1:11 ` Nick Piggin
2008-11-14 1:20 ` H. Peter Anvin
2008-11-14 2:12 ` Nick Piggin
2008-11-04 21:29 ` Ingo Molnar
2008-11-04 21:35 ` H. Peter Anvin
2008-11-04 21:52 ` Ingo Molnar
2008-11-05 17:53 ` Cyrill Gorcunov
2008-11-05 18:04 ` H. Peter Anvin
2008-11-05 18:14 ` Cyrill Gorcunov
2008-11-05 18:20 ` H. Peter Anvin
2008-11-05 18:26 ` Cyrill Gorcunov
[not found] ` <1226243805.27361.1283784629@webmail.messagingengine.com>
2008-11-10 1:29 ` H. Peter Anvin
2008-11-26 21:35 ` [Lguest] " Avi Kivity
2008-11-26 21:50 ` Avi Kivity
2008-11-27 0:03 ` H. Peter Anvin
2008-11-27 10:13 ` Avi Kivity
2008-11-27 10:56 ` Andi Kleen [this message]
2008-11-27 10:59 ` Avi Kivity
2008-11-28 20:48 ` Alexander van Heukelum
2008-11-29 15:45 ` Alexander van Heukelum
2008-11-29 18:21 ` Avi Kivity
2008-11-29 18:22 ` Avi Kivity
2008-11-29 19:58 ` Ingo Molnar
2008-12-01 4:32 ` Rusty Russell
2008-12-01 8:00 ` Ingo Molnar
2008-12-01 9:24 ` Avi Kivity
2008-12-01 10:32 ` Cyrill Gorcunov
2008-12-01 10:41 ` Avi Kivity
2008-12-01 10:49 ` Ingo Molnar
2008-11-10 8:58 ` Ingo Molnar
2008-11-10 12:44 ` Alexander van Heukelum
2008-11-10 13:07 ` Ingo Molnar
2008-11-10 21:35 ` Alexander van Heukelum
2008-11-10 22:21 ` H. Peter Anvin
2008-11-11 5:00 ` H. Peter Anvin
2008-11-13 22:23 ` Matt Mackall
2008-11-14 1:18 ` H. Peter Anvin
2008-11-14 2:29 ` Matt Mackall
2008-11-14 3:22 ` H. Peter Anvin
2008-11-11 9:54 ` Ingo Molnar
2008-11-10 15:39 ` H. Peter Anvin
2008-11-10 21:44 ` Alexander van Heukelum
2008-11-10 23:34 ` H. Peter Anvin
2008-11-05 18:15 ` Cyrill Gorcunov
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=20081127105635.GG6703@one.firstfloor.org \
--to=andi@firstfloor.org \
--cc=avi@redhat.com \
--cc=gorcunov@gmail.com \
--cc=heukelum@fastmail.fm \
--cc=heukelum@mailshack.com \
--cc=hpa@zytor.com \
--cc=jeremy@xensource.com \
--cc=lguest@ozlabs.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=srostedt@redhat.com \
--cc=tglx@linutronix.de \
--cc=travis@sgi.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