From: Rusty Russell <rusty@rustcorp.com.au>
To: Zachary Amsden <zach@vmware.com>
Cc: Chris Wright <chrisw@osdl.org>,
virtualization@lists.osdl.org, xen-devel@lists.xensource.com,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH, experimental] i386 Allow the fixmap to be relocated at boot time
Date: Sat, 06 Aug 2005 22:48:49 +1000 [thread overview]
Message-ID: <1123332529.17152.47.camel@localhost.localdomain> (raw)
In-Reply-To: <42F3FFBA.3040009@vmware.com>
On Fri, 2005-08-05 at 17:09 -0700, Zachary Amsden wrote:
> Also, it seems reasonable that people may want to poke holes in high
> linear space for other hypervisor projects, research, or performance
> reasons without having to build a custom sub-architecture just for
> that. So I think there is some benefit to making the hole size a
> general configurable option (with defaults depending on the sub-arch you
> select).
qemu-fast needs a kernel with __FIXADDR_TOP 0xa7fff000, and PAGE_OFFSET
0x90000000. I used to continually patch my kernels, but these days I
just run full qemu and take the speed hit. If this was easier, it would
be really nice to have that speed back.
Rusty.
--
A bad analogy is like a leaky screwdriver -- Richard Braakman
WARNING: multiple messages have this Message-ID (diff)
From: Rusty Russell <rusty@rustcorp.com.au>
To: Zachary Amsden <zach@vmware.com>
Cc: Chris Wright <chrisw@osdl.org>,
xen-devel@lists.xensource.com,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
virtualization@lists.osdl.org
Subject: Re: [PATCH, experimental] i386 Allow the fixmap to be relocated at boot time
Date: Sat, 06 Aug 2005 22:48:49 +1000 [thread overview]
Message-ID: <1123332529.17152.47.camel@localhost.localdomain> (raw)
In-Reply-To: <42F3FFBA.3040009@vmware.com>
On Fri, 2005-08-05 at 17:09 -0700, Zachary Amsden wrote:
> Also, it seems reasonable that people may want to poke holes in high
> linear space for other hypervisor projects, research, or performance
> reasons without having to build a custom sub-architecture just for
> that. So I think there is some benefit to making the hole size a
> general configurable option (with defaults depending on the sub-arch you
> select).
qemu-fast needs a kernel with __FIXADDR_TOP 0xa7fff000, and PAGE_OFFSET
0x90000000. I used to continually patch my kernels, but these days I
just run full qemu and take the speed hit. If this was easier, it would
be really nice to have that speed back.
Rusty.
--
A bad analogy is like a leaky screwdriver -- Richard Braakman
next prev parent reply other threads:[~2005-08-06 12:48 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-05 23:28 [PATCH,experimental] i386 Allow the fixmap to be relocated at boot time Zachary Amsden
2005-08-05 23:28 ` [PATCH, experimental] " Zachary Amsden
2005-08-05 23:46 ` Chris Wright
2005-08-05 23:46 ` Chris Wright
2005-08-06 0:09 ` Zachary Amsden
2005-08-06 0:09 ` Zachary Amsden
2005-08-06 0:22 ` Chris Wright
2005-08-06 0:22 ` Chris Wright
2005-08-06 12:48 ` Rusty Russell [this message]
2005-08-06 12:48 ` Rusty Russell
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=1123332529.17152.47.camel@localhost.localdomain \
--to=rusty@rustcorp.com.au \
--cc=chrisw@osdl.org \
--cc=linux-kernel@vger.kernel.org \
--cc=virtualization@lists.osdl.org \
--cc=xen-devel@lists.xensource.com \
--cc=zach@vmware.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.