Re: Kexec couldn't reboot capture kernel on pandaboard ES with OMAP4460
On 04/12/2013 04:45 AM, Will Deacon wrote: ... > Back to the SMP point: Stephen, did you ever get anywhere with that > disable_nonboot_cpus thread from a few months back? I'm still keen to get > that working, and I *thought* we had a potential solution... No, I've been side-tracked on too many other things to follow up on that:-( -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Kexec couldn't reboot capture kernel on pandaboard ES with OMAP4460
On Thu, Apr 11, 2013 at 05:19:21PM +0100, Stephen Warren wrote: > On 04/10/2013 10:46 PM, Li Haifeng wrote: > > 2013/4/10 Stephen Warren : > >> On 04/10/2013 03:35 AM, Li Haifeng wrote: > >>> Hi, everyone. > >>> > >>> Recently, I try to run kdump on pandaboard ES with omap4460. After > >>> load capture kernel by "kexec -l" and execute "kexec -e", the serial > >>> port output "Starting new kernel" and "Bye", then the system hangs up. > >>> > >>> I have tried the upstream Linux Kernel v3.4 and v3.8. All are with this > >>> issue. > >> > >> This is a shot in the dark. I assume you have SMP enabled. Can you use > >> hotplug to remove all CPUs other than CPU0, so that the kexec happens on > >> the boot CPU? That is certainly necessary for kexec to work correctly on > >> Tegra. > > > > Thanks for your attention. > > > > I do disable SMP feature. And the .config file for v3.8 could be found here: > > http://pastehtml.com/view/cylyrfejt.txt > ... > > The output: > > [ 57.373687] Starting new kernel > > [ 57.377044] Bye! > > > > Then system hangs. > > Oh well, you've exhausted my knowledge I'm afraid! I can only suggesting > trying to enable earlyprintk and/or uncompressor debug in the kernel > you're kexec'ing and see if that yields any clue. Either that, or JTAG! Also worth using the bleeding edge kexec-tools (i.e. build from source), especially if you want to anything device-tree related. Back to the SMP point: Stephen, did you ever get anywhere with that disable_nonboot_cpus thread from a few months back? I'm still keen to get that working, and I *thought* we had a potential solution... Will -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Kexec couldn't reboot capture kernel on pandaboard ES with OMAP4460
On 04/10/2013 10:46 PM, Li Haifeng wrote: > 2013/4/10 Stephen Warren : >> On 04/10/2013 03:35 AM, Li Haifeng wrote: >>> Hi, everyone. >>> >>> Recently, I try to run kdump on pandaboard ES with omap4460. After >>> load capture kernel by "kexec -l" and execute "kexec -e", the serial >>> port output "Starting new kernel" and "Bye", then the system hangs up. >>> >>> I have tried the upstream Linux Kernel v3.4 and v3.8. All are with this >>> issue. >> >> This is a shot in the dark. I assume you have SMP enabled. Can you use >> hotplug to remove all CPUs other than CPU0, so that the kexec happens on >> the boot CPU? That is certainly necessary for kexec to work correctly on >> Tegra. > > Thanks for your attention. > > I do disable SMP feature. And the .config file for v3.8 could be found here: > http://pastehtml.com/view/cylyrfejt.txt ... > The output: > [ 57.373687] Starting new kernel > [ 57.377044] Bye! > > Then system hangs. Oh well, you've exhausted my knowledge I'm afraid! I can only suggesting trying to enable earlyprintk and/or uncompressor debug in the kernel you're kexec'ing and see if that yields any clue. Either that, or JTAG! -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Kexec couldn't reboot capture kernel on pandaboard ES with OMAP4460
2013/4/10 Stephen Warren : > On 04/10/2013 03:35 AM, Li Haifeng wrote: >> Hi, everyone. >> >> Recently, I try to run kdump on pandaboard ES with omap4460. After >> load capture kernel by "kexec -l" and execute "kexec -e", the serial >> port output "Starting new kernel" and "Bye", then the system hangs up. >> >> I have tried the upstream Linux Kernel v3.4 and v3.8. All are with this >> issue. > > This is a shot in the dark. I assume you have SMP enabled. Can you use > hotplug to remove all CPUs other than CPU0, so that the kexec happens on > the boot CPU? That is certainly necessary for kexec to work correctly on > Tegra. Thanks for your attention. I do disable SMP feature. And the .config file for v3.8 could be found here: http://pastehtml.com/view/cylyrfejt.txt The log and operation could be found here: http://pastehtml.com/view/cylyfrb3a.txt Some key setting list below. bootargs: rw vram=32M fixrtc mem=1G@0x8000 root=/dev/mmcblk0p2 console=ttyO2,115200n8 rootwait crashkernel=64M@0x8200 operation: / # ./kexec -l --append="rw vram=32M fixrtc root=/dev/mmcblk0p2 console=ttyO2, 115200n8 rootwait" uImage / # ./kexec -d -e The output: [ 57.373687] Starting new kernel [ 57.377044] Bye! Then system hangs. -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Kexec couldn't reboot capture kernel on pandaboard ES with OMAP4460
On 04/10/2013 03:35 AM, Li Haifeng wrote: > Hi, everyone. > > Recently, I try to run kdump on pandaboard ES with omap4460. After > load capture kernel by "kexec -l" and execute "kexec -e", the serial > port output "Starting new kernel" and "Bye", then the system hangs up. > > I have tried the upstream Linux Kernel v3.4 and v3.8. All are with this issue. This is a shot in the dark. I assume you have SMP enabled. Can you use hotplug to remove all CPUs other than CPU0, so that the kexec happens on the boot CPU? That is certainly necessary for kexec to work correctly on Tegra. -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Kexec couldn't reboot capture kernel on pandaboard ES with OMAP4460
Hi, everyone. Recently, I try to run kdump on pandaboard ES with omap4460. After load capture kernel by "kexec -l" and execute "kexec -e", the serial port output "Starting new kernel" and "Bye", then the system hangs up. I have tried the upstream Linux Kernel v3.4 and v3.8. All are with this issue. Could you tell my why and how to solve this issue? Thanks very much. -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
