From: ext-mika.1.westerberg@nokia.com (Mika Westerberg) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 1/8] arm: kdump: reserve memory for crashkernel Date: Wed, 5 May 2010 09:54:13 +0300 [thread overview] Message-ID: <2363da273253361141d269e5de1a761719f01fc0.1273041358.git.ext-mika.1.westerberg@nokia.com> (raw) In-Reply-To: <cover.1273041357.git.ext-mika.1.westerberg@nokia.com> Implemented ARM support for command line option "crashkernel=size at start" which allows user to reserve some memory for a dump capture kernel. Signed-off-by: Mika Westerberg <ext-mika.1.westerberg@nokia.com> --- arch/arm/kernel/setup.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 51 insertions(+), 0 deletions(-) diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index c91c77b..076454f 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -19,6 +19,7 @@ #include <linux/seq_file.h> #include <linux/screen_info.h> #include <linux/init.h> +#include <linux/kexec.h> #include <linux/root_dev.h> #include <linux/cpu.h> #include <linux/interrupt.h> @@ -661,6 +662,55 @@ static int __init customize_machine(void) } arch_initcall(customize_machine); +#ifdef CONFIG_KEXEC +static inline unsigned long long get_total_mem(void) +{ + unsigned long total; + + total = max_low_pfn - min_low_pfn; + return total << PAGE_SHIFT; +} + +/** + * reserve_crashkernel() - reserves memory are for crash kernel + * + * This function reserves memory area given in "crashkernel=" kernel command + * line parameter. The memory reserved is used by a dump capture kernel when + * primary kernel is crashing. + */ +static void __init reserve_crashkernel(void) +{ + unsigned long long crash_size, crash_base; + unsigned long long total_mem; + int ret; + + total_mem = get_total_mem(); + ret = parse_crashkernel(boot_command_line, total_mem, + &crash_size, &crash_base); + if (ret) + return; + + ret = reserve_bootmem(crash_base, crash_size, BOOTMEM_EXCLUSIVE); + if (ret < 0) { + printk(KERN_WARNING "crashkernel reservation failed - " + "memory is in use (0x%lx)\n", (unsigned long)crash_base); + return; + } + + printk(KERN_INFO "Reserving %ldMB of memory@%ldMB " + "for crashkernel (System RAM: %ldMB)\n", + (unsigned long)(crash_size >> 20), + (unsigned long)(crash_base >> 20), + (unsigned long)(total_mem >> 20)); + + crashk_res.start = crash_base; + crashk_res.end = crash_base + crash_size - 1; + insert_resource(&iomem_resource, &crashk_res); +} +#else +static inline void reserve_crashkernel(void) {} +#endif /* CONFIG_KEXEC */ + void __init setup_arch(char **cmdline_p) { struct tag *tags = (struct tag *)&init_tags; @@ -720,6 +770,7 @@ void __init setup_arch(char **cmdline_p) #ifdef CONFIG_SMP smp_init_cpus(); #endif + reserve_crashkernel(); cpu_init(); tcm_init(); -- 1.5.6.5
WARNING: multiple messages have this Message-ID (diff)
From: Mika Westerberg <ext-mika.1.westerberg@nokia.com> To: linux-arm-kernel@lists.infradead.org Cc: kexec@lists.infradead.org, "\\\"Mika Westerberg\\\"" <ext-mika.1.westerberg@nokia.com> Subject: [PATCH v2 1/8] arm: kdump: reserve memory for crashkernel Date: Wed, 5 May 2010 09:54:13 +0300 [thread overview] Message-ID: <2363da273253361141d269e5de1a761719f01fc0.1273041358.git.ext-mika.1.westerberg@nokia.com> (raw) In-Reply-To: <cover.1273041357.git.ext-mika.1.westerberg@nokia.com> In-Reply-To: <cover.1273041357.git.ext-mika.1.westerberg@nokia.com> Implemented ARM support for command line option "crashkernel=size@start" which allows user to reserve some memory for a dump capture kernel. Signed-off-by: Mika Westerberg <ext-mika.1.westerberg@nokia.com> --- arch/arm/kernel/setup.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 51 insertions(+), 0 deletions(-) diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index c91c77b..076454f 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -19,6 +19,7 @@ #include <linux/seq_file.h> #include <linux/screen_info.h> #include <linux/init.h> +#include <linux/kexec.h> #include <linux/root_dev.h> #include <linux/cpu.h> #include <linux/interrupt.h> @@ -661,6 +662,55 @@ static int __init customize_machine(void) } arch_initcall(customize_machine); +#ifdef CONFIG_KEXEC +static inline unsigned long long get_total_mem(void) +{ + unsigned long total; + + total = max_low_pfn - min_low_pfn; + return total << PAGE_SHIFT; +} + +/** + * reserve_crashkernel() - reserves memory are for crash kernel + * + * This function reserves memory area given in "crashkernel=" kernel command + * line parameter. The memory reserved is used by a dump capture kernel when + * primary kernel is crashing. + */ +static void __init reserve_crashkernel(void) +{ + unsigned long long crash_size, crash_base; + unsigned long long total_mem; + int ret; + + total_mem = get_total_mem(); + ret = parse_crashkernel(boot_command_line, total_mem, + &crash_size, &crash_base); + if (ret) + return; + + ret = reserve_bootmem(crash_base, crash_size, BOOTMEM_EXCLUSIVE); + if (ret < 0) { + printk(KERN_WARNING "crashkernel reservation failed - " + "memory is in use (0x%lx)\n", (unsigned long)crash_base); + return; + } + + printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " + "for crashkernel (System RAM: %ldMB)\n", + (unsigned long)(crash_size >> 20), + (unsigned long)(crash_base >> 20), + (unsigned long)(total_mem >> 20)); + + crashk_res.start = crash_base; + crashk_res.end = crash_base + crash_size - 1; + insert_resource(&iomem_resource, &crashk_res); +} +#else +static inline void reserve_crashkernel(void) {} +#endif /* CONFIG_KEXEC */ + void __init setup_arch(char **cmdline_p) { struct tag *tags = (struct tag *)&init_tags; @@ -720,6 +770,7 @@ void __init setup_arch(char **cmdline_p) #ifdef CONFIG_SMP smp_init_cpus(); #endif + reserve_crashkernel(); cpu_init(); tcm_init(); -- 1.5.6.5 _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec
next prev parent reply other threads:[~2010-05-05 6:54 UTC|newest] Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top 2010-05-05 6:54 [PATCH v2 0/8] Initial implementation of kdump for ARM Mika Westerberg 2010-05-05 6:54 ` Mika Westerberg 2010-05-05 6:54 ` Mika Westerberg [this message] 2010-05-05 6:54 ` [PATCH v2 1/8] arm: kdump: reserve memory for crashkernel Mika Westerberg 2010-05-05 6:54 ` [PATCH v2 2/8] arm: kdump: implement crash_setup_regs() Mika Westerberg 2010-05-05 6:54 ` Mika Westerberg 2010-05-05 6:54 ` [PATCH v2 3/8] arm: kdump: implement machine_crash_shutdown() Mika Westerberg 2010-05-05 6:54 ` Mika Westerberg 2010-05-05 6:54 ` [PATCH v2 4/8] arm: kdump: skip indirection page when crashing Mika Westerberg 2010-05-05 6:54 ` Mika Westerberg 2010-05-05 6:54 ` [PATCH v2 5/8] arm: kdump: implement copy_oldmem_page() Mika Westerberg 2010-05-05 6:54 ` Mika Westerberg 2010-05-05 6:54 ` [PATCH v2 6/8] arm: allow passing an ELF64 header to elf_check_arch() Mika Westerberg 2010-05-05 6:54 ` Mika Westerberg 2010-05-10 11:20 ` Russell King - ARM Linux 2010-05-10 11:20 ` Russell King - ARM Linux 2010-05-10 12:09 ` Mika Westerberg 2010-05-10 12:09 ` Mika Westerberg 2010-05-10 12:21 ` Russell King - ARM Linux 2010-05-10 12:21 ` Russell King - ARM Linux 2010-05-11 7:17 ` Mika Westerberg 2010-05-11 7:17 ` Mika Westerberg 2010-07-16 8:14 ` Mika Westerberg 2010-07-16 8:14 ` Mika Westerberg 2010-08-25 2:40 ` Lei Wen 2010-08-25 2:40 ` Lei Wen 2010-08-25 12:29 ` Mika Westerberg 2010-08-25 12:29 ` Mika Westerberg 2010-05-05 6:54 ` [PATCH v2 7/8] arm: kdump: add support for elfcorehdr= parameter Mika Westerberg 2010-05-05 6:54 ` Mika Westerberg 2010-05-05 6:54 ` [PATCH v2 8/8] arm: kdump: add CONFIG_CRASH_DUMP Kconfig option Mika Westerberg 2010-05-05 6:54 ` Mika Westerberg 2010-05-25 8:19 ` [PATCH v2 0/8] Initial implementation of kdump for ARM Mika Westerberg 2010-05-25 8:19 ` Mika Westerberg 2010-06-11 6:36 ` Mika Westerberg 2010-07-02 12:48 ` Per Fransson 2010-07-05 8:28 ` Mika Westerberg 2010-07-05 10:01 ` Per Fransson 2010-07-05 10:18 ` Russell King - ARM Linux 2010-07-05 10:34 ` Per Fransson 2010-07-05 11:31 ` Mika Westerberg 2010-07-05 12:04 ` Per Fransson 2010-07-05 13:55 ` Russell King - ARM Linux 2010-07-05 14:05 ` Per Fransson 2010-07-05 14:19 ` Russell King - ARM Linux 2010-07-05 15:37 ` Per Fransson 2010-07-05 16:08 ` Nicolas Pitre 2010-07-05 18:14 ` Russell King - ARM Linux 2010-07-06 8:30 ` Per Fransson 2010-07-07 7:29 ` Mika Westerberg 2010-07-08 8:52 ` Per Fransson 2010-07-12 8:20 ` Mika Westerberg 2010-07-09 3:38 ` Simon Horman 2010-07-09 8:19 ` Per Fransson
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