From: "Yinghai Lu" <yhlu.kernel@gmail.com>
To: "Andi Kleen" <ak@suse.de>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Vivek Goyal" <vgoyal@in.ibm.com>,
"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH]x86_64: build and use GDT on copied compressed kernel
Date: Sat, 12 May 2007 23:41:06 -0700 [thread overview]
Message-ID: <86802c440705122341q3f565d10qec5fb60373cc6824@mail.gmail.com> (raw)
In-Reply-To: <200705130752.56041.ak@suse.de>
On 5/12/07, Andi Kleen <ak@suse.de> wrote:
> On Sunday 13 May 2007 07:33:14 Yinghai Lu wrote:
>
> Can you please give a little more description on why you think the patch
> is needed? Also we need a Signed-off-by line.
in the arch/x86_64/boot/compressed/head.S.
it switch to 64 bit mode and then copy compressed image to higher
address. and jump the copied image, then decompressed the compressed
image to final uncompressed kernel and it may overlapped with original
loaded compressed kernel image.
before jump to 64 bit mode, it will create new page table in some
place higher in copied compressed kernel image. but still use the GDT
in place of original loaded compressed image. So the GDT will be
overwriten in the middle of decompressing.
So we could change to build the GDT like page table together with
copied compressed kernel.
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
http://lkml.org/lkml/2007/5/13/8
next prev parent reply other threads:[~2007-05-13 6:41 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-13 5:33 Yinghai Lu
2007-05-13 5:52 ` Andi Kleen
2007-05-13 6:41 ` Yinghai Lu [this message]
2007-05-13 6:09 ` Eric W. Biederman
2007-05-13 6:29 ` Yinghai Lu
2007-05-13 6:48 ` Eric W. Biederman
2007-05-13 6:55 ` Yinghai Lu
2007-05-13 7:06 ` Eric W. Biederman
2007-05-13 7:27 ` Yinghai Lu
2007-05-13 18:01 ` Yinghai Lu
2007-05-13 19:49 ` Eric W. Biederman
2007-05-13 21:06 ` Yinghai Lu
2007-05-13 21:23 ` Eric W. Biederman
2007-05-14 17:26 ` [PATCH] serial: set RTS and DTR if flow is 'r' Yinghai Lu
2007-05-14 17:54 ` Randy Dunlap
2007-05-14 17:57 ` [PATCH] serial: set RTS and DTR if flow is 'r' --- resend Yinghai Lu
2007-05-14 18:10 ` Russell King
2007-05-14 19:04 ` Yinghai Lu
2007-05-14 19:19 ` Russell King
2007-05-14 19:46 ` Yinghai Lu
2007-05-14 19:50 ` Russell King
2007-05-14 20:04 ` Yinghai Lu
2007-05-15 20:48 ` [PATCH] serial: set DTR in uart for kernel serial console Yinghai Lu
2007-05-22 19:31 ` PATCH] serial: convert early_uart to earlycon for 8250 Yinghai Lu
2007-05-28 10:51 ` Russell King
2007-05-28 17:50 ` Yinghai Lu
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=86802c440705122341q3f565d10qec5fb60373cc6824@mail.gmail.com \
--to=yhlu.kernel@gmail.com \
--cc=ak@suse.de \
--cc=akpm@linux-foundation.org \
--cc=ebiederm@xmission.com \
--cc=linux-kernel@vger.kernel.org \
--cc=vgoyal@in.ibm.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
all inboxes | Powered by JetHome®