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From: Borislav Petkov <petkov@uni-muenster.de>
To: maneesh@in.ibm.com, Vivek Goyal <vgoyal@in.ibm.com>
Subject: Re: kexec?
Date: Wed, 11 May 2005 13:51:41 +0200
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       linux-kernel@vger.kernel.org
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On Wednesday 11 May 2005 08:04, Maneesh Soni wrote:
<snip>
> > > [root@zmei]: kexec -p vmlinux --args-linux --append="root=/dev/hda1
> > > maxcpus=1 init 1"
> >
> >  kexec-tools-1.101 loads for me, but if cmdline is used, it hangs up
> > after "Starting new kernel"
>
> Thanks for trying this out. As Vivek mentioned can you please try with
> bulding second or dump capture kernel with CONFIG_SMP=N and _without_
> maxcpus= option. Basically the second kernel's job is just to save the dump
> and it doesnot need to be a SMP kernel. There are some issues with booting
> SMP kernel as dump capture kernel.

Hm, without 'maxcpus' seems to work. However, when booting into the new 
kernel, the rootfs had to be fsck'ed due to "/ was not cleanly unmounted, 
check forced." and then was forced to reboot linux due to inconsistency in 
the fs. I simply did kexec -l <vmlinux> --args-linux --append="root=/dev/hda1 
init 1" and then kexec -e to execute the loaded image. It seems that the 
filesystems are not unmounted properly before loading the second kernel, (or 
I am missing something..., which is more likely :))

> Also, it would be great help if you can also send us some hardware details
> about the system you are trying, like lspci, 
[root@zmei] lspci -vv
0000:00:00.0 Host bridge: Intel Corp. 82845G/GL[Brookdale-G]/GE/PE DRAM 
Controller/Host-Hub Interface (rev 03)
	Subsystem: Unknown device 1849:2560
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- 
SERR- FastB2B-
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort+ >SERR- <PERR-
	Latency: 0
	Region 0: Memory at e0000000 (32-bit, prefetchable) [size=64M]
	Capabilities: [e4] #09 [6105]
	Capabilities: [a0] AGP version 2.0
		Status: RQ=32 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64- HTrans- 64bit- FW+ 
AGP3- Rate=x1,x2,x4
		Command: RQ=1 ArqSz=0 Cal=0 SBA- AGP- GART64- 64bit- FW- Rate=<none>

0000:00:01.0 PCI bridge: Intel Corp. 82845G/GL[Brookdale-G]/GE/PE Host-to-AGP 
Bridge (rev 03) (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- 
SERR+ FastB2B-
	Status: Cap- 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR-
	Latency: 32
	Bus: primary=00, secondary=01, subordinate=02, sec-latency=32
	I/O behind bridge: 0000c000-0000cfff
	Memory behind bridge: dfd00000-dfdfffff
	Prefetchable memory behind bridge: bfb00000-dfafffff
	BridgeCtl: Parity+ SERR- NoISA+ VGA+ MAbort- >Reset- FastB2B-

0000:00:1d.0 USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) 
USB UHCI Controller #1 (rev 02) (prog-if 00 [UHCI])
	Subsystem: Unknown device 1849:24c0
	Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- 
SERR- FastB2B-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- 
<MAbort- >SERR- <PERR-
	Latency: 0
	Interrupt: pin A routed to IRQ 16
	Region 4: I/O ports at e400 [size=32]

0000:00:1d.1 USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) 
USB UHCI Controller #2 (rev 02) (prog-if 00 [UHCI])
	Subsystem: Unknown device 1849:24c0
	Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- 
SERR- FastB2B-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- 
<MAbort- >SERR- <PERR-
	Latency: 0
	Interrupt: pin B routed to IRQ 19
	Region 4: I/O ports at e800 [size=32]

0000:00:1d.2 USB Controller: Intel Corp. 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) 
USB UHCI Controller #3 (rev 02) (prog-if 00 [UHCI])
	Subsystem: Unknown device 1849:24c0
	Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- 
SERR- FastB2B-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- 
<MAbort- >SERR- <PERR-
	Latency: 0
	Interrupt: pin C routed to IRQ 18
	Region 4: I/O ports at ec00 [size=32]

0000:00:1d.7 USB Controller: Intel Corp. 82801DB/DBM (ICH4/ICH4-M) USB 2.0 
EHCI Controller (rev 02) (prog-if 20 [EHCI])
	Subsystem: Unknown device 1849:24c0
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- 
SERR- FastB2B-
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- 
<MAbort- >SERR- <PERR-
	Latency: 0
	Interrupt: pin D routed to IRQ 23
	Region 0: Memory at dffffc00 (32-bit, non-prefetchable) [size=1K]
	Capabilities: [50] Power Management version 2
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [58] #0a [2080]

0000:00:1e.0 PCI bridge: Intel Corp. 82801 PCI Bridge (rev 82) (prog-if 00 
[Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- 
SERR+ FastB2B-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- 
<MAbort- >SERR- <PERR+
	Latency: 0
	Bus: primary=00, secondary=03, subordinate=03, sec-latency=32
	I/O behind bridge: 0000d000-0000dfff
	Memory behind bridge: dfe00000-dfefffff
	Prefetchable memory behind bridge: dfb00000-dfbfffff
	BridgeCtl: Parity- SERR+ NoISA+ VGA- MAbort- >Reset- FastB2B-

0000:00:1f.0 ISA bridge: Intel Corp. 82801DB/DBL (ICH4/ICH4-L) LPC Bridge (rev 
02)
	Control: I/O+ Mem+ BusMaster+ SpecCycle+ MemWINV- VGASnoop- ParErr- Stepping- 
SERR- FastB2B-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- 
<MAbort- >SERR- <PERR-
	Latency: 0

0000:00:1f.1 IDE interface: Intel Corp. 82801DB/DBL (ICH4/ICH4-L) UltraATA-100 
IDE Controller (rev 02) (prog-if 8a [Master SecP PriP])
	Subsystem: Unknown device 1849:24c0
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- 
SERR- FastB2B-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- 
<MAbort- >SERR- <PERR-
	Latency: 0
	Interrupt: pin A routed to IRQ 18
	Region 0: I/O ports at <unassigned>
	Region 1: I/O ports at <unassigned>
	Region 2: I/O ports at <unassigned>
	Region 3: I/O ports at <unassigned>
	Region 4: I/O ports at fc00 [size=16]
	Region 5: Memory at 20000000 (32-bit, non-prefetchable) [size=1K]

0000:01:00.0 VGA compatible controller: ATI Technologies Inc RV280 [Radeon 
9200 SE] (rev 01) (prog-if 00 [VGA])
	Subsystem: C.P. Technology Co. Ltd CN-AG92E
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- 
SERR- FastB2B-
	Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- 
<MAbort- >SERR- <PERR-
	Latency: 32 (2000ns min), Cache Line Size: 0x08 (32 bytes)
	Interrupt: pin A routed to IRQ 16
	Region 0: Memory at c0000000 (32-bit, prefetchable) [size=256M]
	Region 1: I/O ports at c800 [size=256]
	Region 2: Memory at dfdf0000 (32-bit, non-prefetchable) [size=64K]
	Expansion ROM at dfdc0000 [disabled] [size=128K]
	Capabilities: [58] AGP version 2.0
		Status: RQ=80 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64- HTrans- 64bit- FW+ 
AGP3- Rate=x1,x2,x4
		Command: RQ=1 ArqSz=0 Cal=0 SBA+ AGP- GART64- 64bit- FW- Rate=<none>
	Capabilities: [50] Power Management version 2
		Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-

0000:03:04.0 Multimedia audio controller: Yamaha Corporation YMF-724 (rev 05)
	Subsystem: Yamaha Corporation YMF724-Based PCI Audio Adapter
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- 
SERR- FastB2B-
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- 
<MAbort- >SERR- <PERR+
	Latency: 32 (1250ns min, 6250ns max)
	Interrupt: pin A routed to IRQ 17
	Region 0: Memory at dfef8000 (32-bit, non-prefetchable) [size=32K]
	Capabilities: [50] Power Management version 1
		Flags: PMEClk- DSI- D1- D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-

0000:03:06.0 Communication controller: Conexant HSF 56k HSFi Modem (rev 01)
	Subsystem: Unknown device 182d:3525
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- 
SERR- FastB2B-
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- 
<MAbort- >SERR- <PERR-
	Latency: 32
	Interrupt: pin A routed to IRQ 3
	Region 0: Memory at dfee0000 (32-bit, non-prefetchable) [size=64K]
	Region 1: I/O ports at dc00 [size=8]
	Capabilities: [40] Power Management version 2
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
		Status: D0 PME-Enable- DSel=0 DScale=2 PME-

0000:03:07.0 Multimedia video controller: Brooktree Corporation Bt878 Video 
Capture (rev 02)
	Subsystem: Hauppauge computer works Inc. WinTV Series
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- 
SERR- FastB2B-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- 
<MAbort- >SERR- <PERR-
	Latency: 32 (4000ns min, 10000ns max)
	Interrupt: pin A routed to IRQ 16
	Region 0: Memory at dfbfe000 (32-bit, prefetchable) [size=4K]

0000:03:07.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture 
(rev 02)
	Subsystem: Hauppauge computer works Inc. WinTV Series
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- 
SERR- FastB2B-
	Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- 
<MAbort- >SERR- <PERR-
	Latency: 32 (1000ns min, 63750ns max)
	Interrupt: pin A routed to IRQ 11
	Region 0: Memory at dfbff000 (32-bit, prefetchable) [size=4K]

0000:03:0a.0 Ethernet controller: Realtek Semiconductor Co., Ltd. 
RTL-8139/8139C/8139C+ (rev 10)
	Subsystem: Unknown device 1849:8139
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- 
SERR- FastB2B-
	Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- 
<MAbort- >SERR- <PERR-
	Latency: 32 (8000ns min, 16000ns max)
	Interrupt: pin A routed to IRQ 17
	Region 0: I/O ports at d800 [size=256]
	Region 1: Memory at dfef7f00 (32-bit, non-prefetchable) [size=256]
	Capabilities: [50] Power Management version 2
		Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA PME(D0-,D1+,D2+,D3hot+,D3cold+)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-

[root@zmei]: cat /proc/cpuinfo
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 15
model		: 2
model name	: Intel(R) Pentium(R) 4 CPU 2.60GHz
stepping	: 9
cpu MHz		: 2606.716
cache size	: 512 KB
physical id	: 0
siblings	: 2
core id		: 0
cpu cores	: 1
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 2
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat 
pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid xtpr
bogomips	: 5216.96

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 15
model		: 2
model name	: Intel(R) Pentium(R) 4 CPU 2.60GHz
stepping	: 9
cpu MHz		: 2606.716
cache size	: 512 KB
physical id	: 0
siblings	: 2
core id		: 0
cpu cores	: 1
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 2
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat 
pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid xtpr
bogomips	: 5211.17

The kernel i used is:
2.6.12-rc3-mm3

Regards,
Boris.
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