From: Jeremy Fitzhardinge <jeremy@goop.org>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Yinghai Lu <yinghai@kernel.org>, Ingo Molnar <mingo@elte.hu>,
the arch/x86 maintainers <x86@kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Subject: Re: brk patches..
Date: Sun, 01 Mar 2009 17:16:39 -0800 [thread overview]
Message-ID: <49AB3377.40904@goop.org> (raw)
In-Reply-To: <49AB316E.4000009@zytor.com>
H. Peter Anvin wrote:
> If the brk is bounded-size on the same order or smaller as the kernel,
> we should just mark it as an unallocated (bss) section in the ELF image
> and be done with it... there really is no point in trying to be smarter
> (we'd be subject to failures to load the kernel proper.) If the brk is
> significantly bigger, then yes, we need to be smarter. However, that is
> not my current understanding of the requirements.
>
Yes, right. And in my case I actually need it to generate an
appropriate e820 table, so adding a dependency on e820 would be circular...
(To be specific: I reshape the guest e820 table so that it doesn't have
memory in any forbidden areas of the host e820 table. That may require
moving the pseudo-physical address of pages into a new overflow e820
entry, which would also require allocating pages for the p2m radix tree.)
J
next prev parent reply other threads:[~2009-03-02 1:16 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-28 1:51 [PATCH] Simple brk allocator for very early allocations Jeremy Fitzhardinge
2009-02-28 1:51 ` [PATCH] x86: add brk allocation for very, " Jeremy Fitzhardinge
2009-02-28 1:51 ` [PATCH] x86: reserve brk earlier Jeremy Fitzhardinge
2009-02-28 1:51 ` [PATCH] x86-32: use brk segment for allocating initial kernel pagetable Jeremy Fitzhardinge
2009-02-28 7:02 ` Yinghai Lu
2009-02-28 7:05 ` J Jeremy Fitzhardinge
2009-02-28 7:15 ` J Ingo Molnar
2009-02-28 7:39 ` does boot loader check uncompressed kernel size? Yinghai Lu
2009-02-28 7:47 ` Cyrill Gorcunov
2009-02-28 7:54 ` Yinghai Lu
2009-02-28 8:08 ` H. Peter Anvin
2009-02-28 20:42 ` Yinghai Lu
2009-02-28 7:52 ` brk patches Yinghai Lu
2009-02-28 8:08 ` H. Peter Anvin
2009-02-28 8:17 ` Jeremy Fitzhardinge
2009-02-28 20:40 ` Yinghai Lu
2009-03-01 23:53 ` Jeremy Fitzhardinge
2009-03-02 1:02 ` Yinghai Lu
2009-03-02 1:07 ` H. Peter Anvin
2009-03-02 1:16 ` Jeremy Fitzhardinge [this message]
2009-03-02 1:36 ` H. Peter Anvin
2009-03-02 1:54 ` Jeremy Fitzhardinge
2009-03-02 2:12 ` Yinghai Lu
2009-03-01 1:23 ` [PATCH] x86: put initial_pg_tables into bss Yinghai Lu
2009-03-01 8:31 ` [PATCH] x86: put initial_pg_tables into bss -v2 Yinghai Lu
2009-03-01 9:20 ` H. Peter Anvin
2009-03-01 17:49 ` Yinghai Lu
2009-03-01 18:06 ` Yinghai Lu
2009-03-01 23:29 ` H. Peter Anvin
2009-03-02 0:55 ` Yinghai Lu
2009-03-09 8:15 ` [PATCH] x86: put initial_pg_tables into .bss -v4 Yinghai Lu
2009-03-09 15:41 ` H. Peter Anvin
2009-03-09 17:35 ` Yinghai Lu
2009-03-09 18:28 ` H. Peter Anvin
2009-03-11 1:39 ` Jeremy Fitzhardinge
2009-03-09 7:45 ` [PATCH] x86: put initial_pg_tables into bss -v2 Yinghai Lu
2009-02-28 8:07 ` does boot loader check uncompressed kernel size? H. Peter Anvin
2009-02-28 8:17 ` J Jeremy Fitzhardinge
2009-02-28 7:30 ` J Yinghai Lu
2009-02-28 1:51 ` [PATCH] x86: use brk allocation for DMI Jeremy Fitzhardinge
2009-02-28 1:51 ` [PATCH] x86: leave _brk_end defined Jeremy Fitzhardinge
2009-02-28 5:23 ` [PATCH] Simple brk allocator for very early allocations Andrew Morton
2009-02-28 6:30 ` Jeremy Fitzhardinge
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=49AB3377.40904@goop.org \
--to=jeremy@goop.org \
--cc=hpa@zytor.com \
--cc=jeremy.fitzhardinge@citrix.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=x86@kernel.org \
--cc=yinghai@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