linux/arch/x86
Ken'ichi Ohmichi 629c8b4cdb vmcoreinfo: add the symbol "phys_base"
Fix the problem that makedumpfile sometimes fails on x86_64 machine.

This patch adds the symbol "phys_base" to a vmcoreinfo data.  The
vmcoreinfo data has the minimum debugging information only for dump
filtering.  makedumpfile (dump filtering command) gets it to distinguish
unnecessary pages, and makedumpfile creates a small dumpfile.

On x86_64 kernel which compiled with CONFIG_PHYSICAL_START=0x0 and
CONFIG_RELOCATABLE=y, makedumpfile fails like the following:

 # makedumpfile -d31 /proc/vmcore dumpfile
 The kernel version is not supported.
 The created dumpfile may be incomplete.
 _exclude_free_page: Can't get next online node.

 makedumpfile Failed.
 #

The cause is the lack of the symbol "phys_base" in a vmcoreinfo data.
If the symbol "phys_base" does not exist, makedumpfile considers an
x86_64 kernel as non relocatable.  As the result, makedumpfile
misunderstands the physical address where the kernel is loaded, and it
cannot translate a kernel virtual address to physical address correctly.

To fix this problem, this patch adds the symbol "phys_base" to a
vmcoreinfo data.

Signed-off-by: Ken'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: <stable@kernel.org>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-02 15:28:19 -07:00
..
boot x86-boot: don't request VBE2 information 2008-03-07 16:39:14 +01:00
configs x86, core: remove CONFIG_FORCED_INLINING 2008-02-09 23:24:09 +01:00
crypto [CRYPTO] twofish: Merge common glue code 2008-01-14 17:07:57 +11:00
ia32 x86: clear DF before calling signal handler 2008-03-07 16:39:14 +01:00
kernel vmcoreinfo: add the symbol "phys_base" 2008-04-02 15:28:19 -07:00
kvm KVM: MMU: Fix memory leak on guest demand faults 2008-03-25 10:22:17 +02:00
lguest lguest: comment documentation update. 2008-03-28 11:05:54 +11:00
lib x86: clean up csum-wrappers_64.c some more 2008-02-19 16:18:32 +01:00
mach-default spelling fixes: arch/i386/ 2007-10-20 01:13:56 +02:00
mach-es7000 i386: es7000 minor cleanups 2007-10-17 20:16:15 +02:00
mach-generic spelling fixes: arch/i386/ 2007-10-20 01:13:56 +02:00
mach-rdc321x rdc321x: GPIO routines bugfixes 2008-03-27 16:08:45 +01:00
mach-visws x86/visws: fix printk format warnings 2008-03-21 17:06:15 +01:00
mach-voyager calibrate_delay() must be __cpuinit 2008-02-06 10:41:08 -08:00
math-emu x86: arch/x86/math-emu/errors.c: fix printk warnings 2008-01-30 13:32:13 +01:00
mm Avoid false positive warnings in kmap_atomic_prot() with DEBUG_HIGHMEM 2008-03-28 13:08:14 -07:00
oprofile x86: rename stack_pointer to kernel_trap_sp 2008-01-30 13:33:16 +01:00
pci fix BIOS PCI config cycle buglet causing ACPI boot regression 2008-03-10 18:09:05 -07:00
power x86 cleanup: suspend_asm_64.S - use X86_CR4_PGE instead of numeric value 2008-02-19 16:18:33 +01:00
vdso x86 vdso: fix build locale dependency 2008-02-29 18:55:39 +01:00
video
xen xen: fix UP setup of shared_info 2008-03-27 16:08:45 +01:00
Kconfig documentation: Move power-related files to Documentation/power/ 2008-03-12 18:10:51 -04:00
Kconfig.cpu x86: a P4 is a P6 not an i486 2008-03-04 11:55:34 -08:00
Kconfig.debug x86: change IO delay back to 0x80 2008-02-19 16:18:34 +01:00
Makefile x86: fix vdso_install breaks user "make install" 2008-02-19 16:18:34 +01:00
Makefile_32.cpu x86: move i386 and x86_64 Makefiles to arch/x86 2007-10-25 22:27:34 +02:00