linux-kernel - Re: [PATCH] x86: fix 2 section mismatch warnings

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Message-ID: <20080815135027.GB14103@elte.hu>
Date:	Fri, 15 Aug 2008 15:50:27 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Marcin Slusarz <marcin.slusarz@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH] x86: fix 2 section mismatch warnings -
	find_and_reserve_crashkernel


* Marcin Slusarz <marcin.slusarz@...il.com> wrote:

> I looked at both implementations of arch_setup_additional_pages and 
> didn't see any call to native_set_fixmap or function which calls 
> directly native_set_fixmap... Can you tell me what's the callchain?

the callchain would be:

[   20.116039] PM: Adding info for No Bus:vcsa1
[   20.180039] BUG: unable to handle kernel paging request at c0833e44
[   20.180039] IP: [<c0833e44>] native_set_fixmap+0x0/0x1d
[   20.180039] *pde = 36f2a163 *pte = 00833162
[   20.180039] Oops: 0000 [#1] SMP DEBUG_PAGEALLOC
[   20.180039] Modules linked in:
[   20.180039]
[   20.180039] Pid: 1, comm: init Not tainted (2.6.27-rc3-00005-g844342a-dirty #24071)
[   20.180039] EIP: 0060:[<c0833e44>] EFLAGS: 00010216 CPU: 0
[   20.180039] EIP is at native_set_fixmap+0x0/0x1d
[   20.180039] EAX: 00000001 EBX: 00000001 ECX: 00000025 EDX: 3782e000
[   20.180039] ESI: 00000000 EDI: f671c000 EBP: f7836e68 ESP: f7836e4c
[   20.180039]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[   20.180039] Process init (pid: 1, ti=f7836000 task=f7870000 task.ti=f7836000)
[   20.180039] Stack: c011d580 f671c034 c018bbea 00000025 00000000 00000988 f6ef2000 f7836f1c
[   20.180039]        c01b43d6 00000003 00000008 f7836f7c f782fd10 00000003 f78b6100 08048000
[   20.180039]        00000000 00000001 f67a2500 08050b99 08050b99 00000000 00000000 00000000
[   20.180039] Call Trace:
[   20.180039]  [<c011d580>] ? arch_setup_additional_pages+0x8c/0x124
[   20.180039]  [<c018bbea>] ? try_module_get+0x8/0x2f
[   20.180039]  [<c01b43d6>] ? load_elf_binary+0xae6/0x1108
[   20.180039]  [<c0144c6d>] ? lock_release_holdtime+0x43/0x48
[   20.180039]  [<c018c0c0>] ? search_binary_handler+0x92/0x1e5
[   20.180039]  [<c01b38f0>] ? load_elf_binary+0x0/0x1108
[   20.180039]  [<c018d2d7>] ? do_execve+0x14c/0x1d8
[   20.180039]  [<c0101dd8>] ? sys_execve+0x2e/0x56
[   20.180039]  [<c01030ca>] ? syscall_call+0x7/0xb
[   20.180039]  [<c01067c8>] ? kernel_execve+0x1c/0x21
[   20.180039]  [<c0101286>] ? run_init_process+0x1c/0x1e
[   20.180039]  [<c0101333>] ? init_post+0xab/0xd4
[   20.180039]  [<c0103d07>] ? kernel_thread_helper+0x7/0x10
[   20.180039]  =======================
[   20.180039] Code:  Bad EIP value.

	Ingo
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