From: "H. Peter Anvin" <hpa@zytor.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: vgoyal@in.ibm.com, fastboot@osdl.org, Horms <horms@verge.net.au>,
Jan Kratochvil <lace@jankratochvil.net>,
Magnus Damm <magnus.damm@gmail.com>,
linux-kernel@vger.kernel.org
Subject: Re: [Fastboot] [CFT] ELF Relocatable x86 and x86_64 bzImages
Date: Mon, 31 Jul 2006 19:34:57 -0700 [thread overview]
Message-ID: <44CEBDD1.10302@zytor.com> (raw)
In-Reply-To: <m18xm9425s.fsf@ebiederm.dsl.xmission.com>
Eric W. Biederman wrote:
>
>> Ok. I am decompressing the kernel to 16MB and after reducing 1MB of
>> CONFIG_PHYSICAL_START I am left with 15MB which is not 4M aligned
>> hence I seems to be running into it.
>>
>> I changed it to
>>
>> if ((u32)output) & 0x3fffff)
>>
>> and kdump kernel booted fine. But this will run into issues if I load
>> kernel at 1MB.
>>
>> I got a dump question. Why do I have to load the kernel at 4MB alignment?
>> Existing kernel boots loads at 1MB, which is non 4MB aligned and it works
>> fine?
>
> 4MB is a little harsh, but I haven't worked through what the exact rules
> are, I know 4MB is the worst case alignment for arch/i386.
>
4 MB would be worst case for i386; 2 MB for x86-64. Actually the x86-64
worst case would be gigabyte, but that's more than a little bit extreme.
-hpa
next prev parent reply other threads:[~2006-08-01 2:35 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <aec7e5c30606300145p441d8d0xd89fab5e87de5a22@mail.gmail.com>
[not found] ` <20060705222448.GC992@in.ibm.com>
[not found] ` <aec7e5c30607051932r49bbcc7eh2c190daa06859dcc@mail.gmail.com>
[not found] ` <20060706081520.GB28225@host0.dyn.jankratochvil.net>
[not found] ` <aec7e5c30607070147g657d2624qa93a145dd4515484@mail.gmail.com>
[not found] ` <20060707133518.GA15810@in.ibm.com>
[not found] ` <20060707143519.GB13097@host0.dyn.jankratochvil.net>
[not found] ` <20060710233219.GF16215@in.ibm.com>
[not found] ` <20060711010815.GB1021@host0.dyn.jankratochvil.net>
[not found] ` <m1d5c92yv4.fsf@ebiederm.dsl.xmission.com>
2006-07-31 16:19 ` [CFT] ELF Relocatable x86 and x86_64 bzImages Eric W. Biederman
2006-07-31 20:25 ` Vivek Goyal
2006-07-31 21:00 ` [Fastboot] " Vivek Goyal
2006-08-01 2:31 ` Eric W. Biederman
2006-08-01 2:34 ` H. Peter Anvin [this message]
2006-08-01 3:44 ` Eric W. Biederman
2006-08-01 4:25 ` Jan Kratochvil
2006-08-01 9:09 ` Eric W. Biederman
2006-08-01 9:43 ` Jan Kratochvil
2006-08-01 11:28 ` Eric W. Biederman
2006-08-04 21:08 ` Don Zickus
2006-08-04 21:25 ` Eric W. Biederman
2006-08-04 23:43 ` Don Zickus
2006-08-05 7:49 ` Eric W. Biederman
2006-08-05 16:07 ` Eric W. Biederman
2006-08-07 17:44 ` Don Zickus
2006-08-07 18:08 ` Eric W. Biederman
2006-08-07 23:57 ` Don Zickus
2006-08-08 5:01 ` Eric W. Biederman
2006-08-08 19:36 ` Don Zickus
2006-08-09 20:06 ` Don Zickus
2006-08-10 6:09 ` Eric W. Biederman
2006-08-10 13:13 ` Vivek Goyal
2006-08-10 17:05 ` Eric W. Biederman
2006-08-10 18:18 ` Vivek Goyal
2006-08-10 20:09 ` Eric W. Biederman
2006-08-11 21:25 ` Don Zickus
2006-08-12 7:20 ` Eric W. Biederman
2006-08-12 15:25 ` Don Zickus
2006-08-12 19:41 ` Eric W. Biederman
2006-08-13 20:06 ` Andi Kleen
2006-08-13 21:44 ` Eric W. Biederman
2006-08-14 16:51 ` [Fastboot] " Vivek Goyal
2006-08-14 17:04 ` H. Peter Anvin
2006-08-14 18:11 ` Vivek Goyal
2006-08-14 19:32 ` H. Peter Anvin
2006-08-14 19:42 ` Vivek Goyal
2006-08-14 19:45 ` H. Peter Anvin
2006-08-14 19:57 ` Vivek Goyal
2006-08-14 20:10 ` Eric W. Biederman
2006-08-14 20:59 ` Vivek Goyal
2006-08-14 21:15 ` Eric W. Biederman
2006-08-14 20:00 ` Eric W. Biederman
2006-08-08 23:36 ` Andi Kleen
2006-08-25 20:16 ` Vivek Goyal
2006-08-25 20:16 ` Vivek Goyal
[not found] <6EIOG-2xY-31@gated-at.bofh.it>
[not found] ` <6EIOG-2xY-33@gated-at.bofh.it>
[not found] ` <6EIOG-2xY-35@gated-at.bofh.it>
[not found] ` <6EIOG-2xY-37@gated-at.bofh.it>
[not found] ` <6EIOG-2xY-39@gated-at.bofh.it>
[not found] ` <6EIOG-2xY-19@gated-at.bofh.it>
[not found] ` <6Gf5M-2zt-23@gated-at.bofh.it>
[not found] ` <6Gfpt-30C-49@gated-at.bofh.it>
[not found] ` <6GhAA-6bP-19@gated-at.bofh.it>
[not found] ` <6Gx2C-436-5@gated-at.bofh.it>
[not found] ` <6HhoT-5E7-33@gated-at.bofh.it>
[not found] ` <6HhRQ-6uk-3@gated-at.bofh.it>
2006-08-09 12:40 ` [Fastboot] " Bodo Eggert
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=44CEBDD1.10302@zytor.com \
--to=hpa@zytor.com \
--cc=ebiederm@xmission.com \
--cc=fastboot@osdl.org \
--cc=horms@verge.net.au \
--cc=lace@jankratochvil.net \
--cc=linux-kernel@vger.kernel.org \
--cc=magnus.damm@gmail.com \
--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 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.