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authorKen'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp>2007-10-16 23:27:27 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-17 08:42:54 -0700
commitfd59d231f81cb02870b9cf15f456a897f3669b4e (patch)
tree5713c13bd678774f1ba3c42bfff5008c1812deae /arch
parent0e647c04f665e9b3451a1ebe8252b38ffe0207c8 (diff)
Add vmcoreinfo
This patch set frees the restriction that makedumpfile users should install a vmlinux file (including the debugging information) into each system. makedumpfile command is the dump filtering feature for kdump. It creates a small dumpfile by filtering unnecessary pages for the analysis. To distinguish unnecessary pages, it needs a vmlinux file including the debugging information. These days, the debugging package becomes a huge file, and it is hard to install it into each system. To solve the problem, kdump developers discussed it at lkml and kexec-ml. As the result, we reached the conclusion that necessary information for dump filtering (called "vmcoreinfo") should be embedded into the first kernel file and it should be accessed through /proc/vmcore during the second kernel. (http://www.uwsg.iu.edu/hypermail/linux/kernel/0707.0/1806.html) Dan Aloni created the patch set for the above implementation. (http://www.uwsg.iu.edu/hypermail/linux/kernel/0707.1/1053.html) And I updated it for multi architectures and memory models. (http://lists.infradead.org/pipermail/kexec/2007-August/000479.html) Signed-off-by: Dan Aloni <da-x@monatomic.org> Signed-off-by: Ken'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp> Signed-off-by: Bernhard Walle <bwalle@suse.de> Signed-off-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/ia64/kernel/machine_kexec.c30
-rw-r--r--arch/ia64/mm/discontig.c2
-rw-r--r--arch/x86/kernel/machine_kexec_32.c13
-rw-r--r--arch/x86/kernel/machine_kexec_64.c9
4 files changed, 53 insertions, 1 deletions
diff --git a/arch/ia64/kernel/machine_kexec.c b/arch/ia64/kernel/machine_kexec.c
index 58e943a5d95c..40f9c3e19220 100644
--- a/arch/ia64/kernel/machine_kexec.c
+++ b/arch/ia64/kernel/machine_kexec.c
@@ -15,6 +15,8 @@
#include <linux/cpu.h>
#include <linux/irq.h>
#include <linux/efi.h>
+#include <linux/numa.h>
+#include <linux/mmzone.h>
#include <asm/mmu_context.h>
#include <asm/setup.h>
#include <asm/delay.h>
@@ -121,3 +123,31 @@ void machine_kexec(struct kimage *image)
unw_init_running(ia64_machine_kexec, image);
for(;;);
}
+
+void arch_crash_save_vmcoreinfo(void)
+{
+#ifdef CONFIG_ARCH_DISCONTIGMEM_ENABLE
+ SYMBOL(pgdat_list);
+ LENGTH(pgdat_list, MAX_NUMNODES);
+
+ SYMBOL(node_memblk);
+ LENGTH(node_memblk, NR_NODE_MEMBLKS);
+ SIZE(node_memblk_s);
+ OFFSET(node_memblk_s, start_paddr);
+ OFFSET(node_memblk_s, size);
+#endif
+#ifdef CONFIG_PGTABLE_3
+ CONFIG(PGTABLE_3);
+#elif CONFIG_PGTABLE_4
+ CONFIG(PGTABLE_4);
+#endif
+}
+
+unsigned long paddr_vmcoreinfo_note(void)
+{
+ unsigned long vaddr, paddr;
+ vaddr = (unsigned long)(char *)&vmcoreinfo_note;
+ asm volatile ("tpa %0 = %1" : "=r"(paddr) : "r"(vaddr) : "memory");
+ return paddr;
+}
+
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
index 5628067a74d2..0b567398f38e 100644
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -48,7 +48,7 @@ struct early_node_data {
static struct early_node_data mem_data[MAX_NUMNODES] __initdata;
static nodemask_t memory_less_mask __initdata;
-static pg_data_t *pgdat_list[MAX_NUMNODES];
+pg_data_t *pgdat_list[MAX_NUMNODES];
/*
* To prevent cache aliasing effects, align per-node structures so that they
diff --git a/arch/x86/kernel/machine_kexec_32.c b/arch/x86/kernel/machine_kexec_32.c
index deda9a221cf2..ae20fa5afa62 100644
--- a/arch/x86/kernel/machine_kexec_32.c
+++ b/arch/x86/kernel/machine_kexec_32.c
@@ -10,6 +10,7 @@
#include <linux/kexec.h>
#include <linux/delay.h>
#include <linux/init.h>
+#include <linux/numa.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/tlbflush.h>
@@ -169,3 +170,15 @@ static int __init parse_crashkernel(char *arg)
return 0;
}
early_param("crashkernel", parse_crashkernel);
+
+void arch_crash_save_vmcoreinfo(void)
+{
+#ifdef CONFIG_ARCH_DISCONTIGMEM_ENABLE
+ SYMBOL(node_data);
+ LENGTH(node_data, MAX_NUMNODES);
+#endif
+#ifdef CONFIG_X86_PAE
+ CONFIG(X86_PAE);
+#endif
+}
+
diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
index cd1899a2f0c5..e333ea110a58 100644
--- a/arch/x86/kernel/machine_kexec_64.c
+++ b/arch/x86/kernel/machine_kexec_64.c
@@ -10,6 +10,7 @@
#include <linux/kexec.h>
#include <linux/string.h>
#include <linux/reboot.h>
+#include <linux/numa.h>
#include <asm/pgtable.h>
#include <asm/tlbflush.h>
#include <asm/mmu_context.h>
@@ -257,3 +258,11 @@ static int __init setup_crashkernel(char *arg)
}
early_param("crashkernel", setup_crashkernel);
+void arch_crash_save_vmcoreinfo(void)
+{
+#ifdef CONFIG_ARCH_DISCONTIGMEM_ENABLE
+ SYMBOL(node_data);
+ LENGTH(node_data, MAX_NUMNODES);
+#endif
+}
+