diff options
| author | Ken'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp> | 2007-10-16 23:27:27 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-17 08:42:54 -0700 |
| commit | fd59d231f81cb02870b9cf15f456a897f3669b4e (patch) | |
| tree | 5713c13bd678774f1ba3c42bfff5008c1812deae /arch/ia64/kernel | |
| parent | 0e647c04f665e9b3451a1ebe8252b38ffe0207c8 (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/ia64/kernel')
| -rw-r--r-- | arch/ia64/kernel/machine_kexec.c | 30 |
1 files changed, 30 insertions, 0 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; +} + |