linux-kernel - 2.6.19-rc1: kexec broken on x86

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Message-ID: <aec7e5c30610050328i2bf9e3b6qcacc1873231ece28@mail.gmail.com>
Date:	Thu, 5 Oct 2006 19:28:35 +0900
From:	"Magnus Damm" <magnus.damm@...il.com>
To:	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Cc:	fastboot@...ts.osdl.org,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"Vivek Goyal" <vgoyal@...ibm.com>, Horms <horms@...ge.net.au>,
	"Magnus Damm" <magnus@...inux.co.jp>
Subject: 2.6.19-rc1: kexec broken on x86_64

Kexec is broken on x86_64 under 2.6.19-rc1.

Or rather - kexec works ok under 2.6.19-rc1, but something related to
the vmlinux format has probably changed and kexec-tools fails to load
a vmlinux from 2.6.19-rc1.

Loading bzImage works as usual, but vmlinux does not load properly.

The kexec binary fails with the following message:

Overlapping memory segments at 0x351000
sort_segments failed
/ #

Again, running kexec under 2.6.19-rc1 works ok. But rebooting into a
2.6.19-rc1 vmlinux does not work correctly. This is regardless of
which kexec-tools tree used.

A coarse-grained bisect says that the problem was introduced in 2.6.18-git7.

But maybe this is a kexec-tools issue?

I've used Horms testing tree as usual, tested the latest version
5aa1e11a27f1dc1ce96f850966e94f68c9cd8bce to be exact. Horms testing
tree that can be found here:

http://www.kernel.org/git/?p=linux/kernel/git/horms/kexec-tools-testing.git;a=summary

I've also tried version 71d2424c8ac4f93a60c3eee5c95df269f584a9da of
Eric's main tree:

http://www.kernel.org/git/?p=linux/kernel/git/ebiederm/kexec-tools.git;a=summary

That tree is unfortunately broken on x86_64. You need to apply the
follwing patch on x86_64 to be able to compile:

http://www.kernel.org/git/?p=linux/kernel/git/horms/kexec-tools-testing.git;a=commit;h=6492b850281a106c042221b836a693141fd9b49b

None of the kexec-tools trees can load a 2.6.19-rc1 vmlinux under
x86_64. i386 works fine.

/ magnus
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