From: Maneesh Soni I have heard some complaints about people not finding CONFIG_CRASH_DUMP option and also some objections about its dependency on CONFIG_EMBEDDED. The following patch ends that dependency. I thought of hiding it under CONFIG_KEXEC, but CONFIG_PHYSICAL_START could also be used for some reasons other than kexec/kdump and hence left it visible. I will also update the documentation accordingly. o Following patch removes the config dependency of CONFIG_PHYSICAL_START on CONFIG_EMBEDDED. The reason being CONFIG_CRASH_DUMP option for kdump needs CONFIG_PHYSICAL_START which makes CONFIG_CRASH_DUMP depend on CONFIG_EMBEDDED. It is not always obvious for kdump users to choose CONFIG_EMBEDDED. o It also shifts the palce where this option appears, to make it closer to kexec and kdump options. Signed-off-by: Maneesh Soni Cc: "Eric W. Biederman" Cc: Haren Myneni Signed-off-by: Andrew Morton --- arch/i386/Kconfig | 33 +++++++++++++++++++++------------ arch/x86_64/Kconfig | 31 +++++++++++++++++++------------ fs/Kconfig | 2 +- 3 files changed, 41 insertions(+), 25 deletions(-) diff -puN arch/i386/Kconfig~kexec-change-config_physical_start-dependency arch/i386/Kconfig --- devel/arch/i386/Kconfig~kexec-change-config_physical_start-dependency 2005-12-22 05:09:30.000000000 -0800 +++ devel-akpm/arch/i386/Kconfig 2005-12-22 05:09:31.000000000 -0800 @@ -653,17 +653,6 @@ config SECCOMP source kernel/Kconfig.hz -config PHYSICAL_START - hex "Physical address where the kernel is loaded" if EMBEDDED - default "0x100000" - help - This gives the physical address where the kernel is loaded. - Primarily used in the case of kexec on panic where the - fail safe kernel needs to run at a different address than - the panic-ed kernel. - - Don't change this unless you know what you are doing. - config KEXEC bool "kexec system call (EXPERIMENTAL)" depends on EXPERIMENTAL @@ -683,11 +672,31 @@ config KEXEC config CRASH_DUMP bool "kernel crash dumps (EXPERIMENTAL)" - depends on EMBEDDED depends on EXPERIMENTAL depends on HIGHMEM help Generate crash dump after being started by kexec. + +config PHYSICAL_START + hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP) + + default "0x1000000" if CRASH_DUMP + default "0x100000" + help + This gives the physical address where the kernel is loaded. Normally + for regular kernels this value is 0x100000 (1MB). But in the case + of kexec on panic the fail safe kernel needs to run at a different + address than the panic-ed kernel. This option is used to set the load + address for kernels used to capture crash dump on being kexec'ed + after panic. The default value for crash dump kernels is + 0x1000000 (16MB). This can also be set based on the "X" value as + specified in the "crashkernel=YM@XM" command line boot parameter + passed to the panic-ed kernel. Typically this parameter is set as + crashkernel=64M@16M. Please take a look at + Documentation/kdump/kdump.txt for more details about crash dumps. + + Don't change this unless you know what you are doing. + endmenu diff -puN arch/x86_64/Kconfig~kexec-change-config_physical_start-dependency arch/x86_64/Kconfig --- devel/arch/x86_64/Kconfig~kexec-change-config_physical_start-dependency 2005-12-22 05:09:30.000000000 -0800 +++ devel-akpm/arch/x86_64/Kconfig 2005-12-22 05:09:31.000000000 -0800 @@ -421,17 +421,6 @@ config X86_MCE_AMD Additional support for AMD specific MCE features such as the DRAM Error Threshold. -config PHYSICAL_START - hex "Physical address where the kernel is loaded" if EMBEDDED - default "0x100000" - help - This gives the physical address where the kernel is loaded. - Primarily used in the case of kexec on panic where the - fail safe kernel needs to run at a different address than - the panic-ed kernel. - - Don't change this unless you know what you are doing. - config KEXEC bool "kexec system call (EXPERIMENTAL)" depends on EXPERIMENTAL @@ -451,11 +440,29 @@ config KEXEC config CRASH_DUMP bool "kernel crash dumps (EXPERIMENTAL)" - depends on EMBEDDED depends on EXPERIMENTAL help Generate crash dump after being started by kexec. +config PHYSICAL_START + hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP) + default "0x1000000" if CRASH_DUMP + default "0x100000" + help + This gives the physical address where the kernel is loaded. Normally + for regular kernels this value is 0x100000 (1MB). But in the case + of kexec on panic the fail safe kernel needs to run at a different + address than the panic-ed kernel. This option is used to set the load + address for kernels used to capture crash dump on being kexec'ed + after panic. The default value for crash dump kernels is + 0x1000000 (16MB). This can also be set based on the "X" value as + specified in the "crashkernel=YM@XM" command line boot parameter + passed to the panic-ed kernel. Typically this parameter is set as + crashkernel=64M@16M. Please take a look at + Documentation/kdump/kdump.txt for more details about crash dumps. + + Don't change this unless you know what you are doing. + config SECCOMP bool "Enable seccomp to safely compute untrusted bytecode" depends on PROC_FS diff -puN fs/Kconfig~kexec-change-config_physical_start-dependency fs/Kconfig --- devel/fs/Kconfig~kexec-change-config_physical_start-dependency 2005-12-22 05:09:30.000000000 -0800 +++ devel-akpm/fs/Kconfig 2005-12-22 05:09:31.000000000 -0800 @@ -799,7 +799,7 @@ config PROC_KCORE config PROC_VMCORE bool "/proc/vmcore support (EXPERIMENTAL)" - depends on PROC_FS && EMBEDDED && EXPERIMENTAL && CRASH_DUMP + depends on PROC_FS && EXPERIMENTAL && CRASH_DUMP help Exports the dump image of crashed kernel in ELF format. _