Vivek Goyal 87937472ff [PATCH] i386: export memory more than 4G through /proc/iomem ... Currently /proc/iomem exports physical memory also apart from io device memory. But on i386, it truncates any memory more than 4GB. This leads to problems for kexec/kdump. Kexec reads /proc/iomem to determine the system memory layout and prepares a memory map based on that and passes it to the kernel being kexeced. Given the fact that memory more than 4GB has been truncated, new kernel never gets to see and use that memory. Kdump also reads /proc/iomem to determine the physical memory layout of the system and encodes this informaiton in ELF headers. After a crash new kernel parses these ELF headers being used by previous kernel and vmcore is prepared accordingly. As memory more than 4GB has been truncated, kdump never sees that memory and never prepares ELF headers for it. Hence vmcore is truncated and limited to 4GB even if there is more physical memory in the system. This patch exports memory more than 4GB through /proc/iomem on i386. Cc: Maneesh Soni <maneesh@in.ibm.com> Cc: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>		2006-06-27 09:24:00 -07:00
..
acpi	Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6	2006-06-23 07:52:36 -07:00
cpu	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial	2006-06-26 13:33:14 -07:00
.gitignore	[PATCH] x86: gitignore some autogenerated files for i386	2006-02-14 16:09:35 -08:00
alternative.c	[PATCH] x86_64: x86_64 version of the smp alternative patch.	2006-06-26 10:48:14 -07:00
apic.c	[PATCH] x86_64: fix apic error on bootup	2006-06-26 10:48:22 -07:00
apm.c	[PATCH] i386/x86-64/ia64: Move polling flag into thread_info_status	2006-06-26 10:48:21 -07:00
asm-offsets.c	[CRYPTO] all: Pass tfm instead of ctx to algorithms	2006-06-26 17:34:39 +10:00
bootflag.c
cpuid.c	[PATCH] x86 cpuid and msr notifier callback section mismatches	2006-04-19 09:13:50 -07:00
crash_dump.c
crash.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial	2006-06-26 13:33:14 -07:00
doublefault.c	[PATCH] i386: cpu_relax() in crash.c and doublefault.c	2006-06-25 10:00:55 -07:00
early_printk.c
efi_stub.S
efi.c	[PATCH] 64bit resource: fix up printks for resources in arch and core code	2006-06-27 09:23:59 -07:00
entry.S	[PATCH] i386: reliable stack trace support i386 entry.S	2006-06-26 10:48:17 -07:00
head.S	[PATCH] i386: cleanup after cpu_gdt_descr conversion to per-cpu data	2006-03-23 07:38:06 -08:00
hpet.c	[PATCH] generic-time: add macro to simplify/hide mask constants	2006-06-26 09:58:21 -07:00
i386_ksyms.c	[PATCH] No arch-specific strpbrk implementations	2006-04-11 06:18:40 -07:00
i387.c	[PATCH] x86: make i387 mxcsr_feature_mask __read_mostly	2006-06-23 07:42:57 -07:00
i8237.c
i8253.c	[PATCH] time: fix time going backward w/ clock=pit	2006-06-26 09:58:21 -07:00
i8259.c	spelling fixes	2006-06-26 18:35:02 +02:00
init_task.c
io_apic.c	[PATCH] x86_64: fix vector_lock deadlock in io_apic.c	2006-06-26 10:48:17 -07:00
ioport.c
irq.c	[PATCH] i386/x86-64: adjust /proc/interrupts column headings	2006-06-26 10:48:21 -07:00
kprobes.c	[PATCH] Kprobe: multi kprobe posthandler for booster	2006-06-26 09:58:22 -07:00
ldt.c
machine_kexec.c	Storage class should be first	2006-06-26 18:57:34 +02:00
Makefile	Merge branch 'x86-64'	2006-06-26 10:51:09 -07:00
mca.c
microcode.c	[PATCH] fix x86 microcode driver handling of multiple matching revisions	2006-06-23 07:42:56 -07:00
module.c	[PATCH] x86: SMP alternatives	2006-03-23 07:38:04 -08:00
mpparse.c	[PATCH] x86_64: avoid IRQ0 ioapic pin collision	2006-05-08 09:34:56 -07:00
msr.c	[PATCH] x86 cpuid and msr notifier callback section mismatches	2006-04-19 09:13:50 -07:00
nmi.c	[PATCH] x86_64: i386/x86-64 Add nmi watchdog support for new Intel CPUs	2006-06-26 10:48:22 -07:00
numaq.c	[PATCH] Time: i386 Conversion - part 2: Rework TSC Support	2006-06-26 09:58:21 -07:00
pci-dma.c
process.c	[PATCH] i386/x86-64/ia64: Move polling flag into thread_info_status	2006-06-26 10:48:21 -07:00
ptrace.c	[PATCH] drop task argument of audit_syscall_{entry,exit}	2006-05-01 06:06:18 -04:00
quirks.c	[PATCH] EDAC: core EDAC support code	2006-01-18 19:20:31 -08:00
reboot_fixups.c	[PATCH] i386: Remove printk about reboot fixups at reboot	2006-04-09 11:53:53 -07:00
reboot.c
relocate_kernel.S
scx200.c
semaphore.c	[PATCH] x86: SMP alternatives	2006-03-23 07:38:04 -08:00
setup.c	[PATCH] i386: export memory more than 4G through /proc/iomem	2006-06-27 09:24:00 -07:00
sigframe.h
signal.c	[PATCH] swsusp: finally solve mysqld problem	2006-03-23 07:38:08 -08:00
smp.c	[PATCH] x86_64: Standardize i386/x86_64 handling of NMI_VECTOR	2006-06-26 10:48:22 -07:00
smpboot.c	[PATCH] x86_64: nmi watchdog header cleanup	2006-06-26 10:48:16 -07:00
srat.c	[PATCH] Unify pxm_to_node() and node_to_pxm()	2006-06-23 07:42:48 -07:00
summit.c
sys_i386.c	[PATCH] Uninline sys_mmap common code (reduce binary size)	2006-03-22 07:54:02 -08:00
syscall_table.S	[PATCH] sys_move_pages: 32bit support (i386, x86_64)	2006-06-23 07:42:53 -07:00
sysenter.c
time_hpet.c
time.c	[PATCH] Time: i386 Clocksource Drivers	2006-06-26 09:58:21 -07:00
topology.c	[PATCH] x86 topology: don;t create a control file for BSP that cannot be removed	2006-03-23 07:38:07 -08:00
trampoline.S
traps.c	[PATCH] i386/x86-64: fall back to old-style call trace if no unwinding	2006-06-26 10:48:18 -07:00
tsc.c	[PATCH] generic-time: add macro to simplify/hide mask constants	2006-06-26 09:58:21 -07:00
vm86.c	[PATCH] drop task argument of audit_syscall_{entry,exit}	2006-05-01 06:06:18 -04:00
vmlinux.lds.S	[PATCH] i386: reliable stack trace support (i386)	2006-06-26 10:48:17 -07:00
vsyscall-int80.S
vsyscall-note.S
vsyscall-sigreturn.S	[PATCH] Mark unwind info for signal trampolines in vDSOs	2006-03-31 12:18:52 -08:00
vsyscall-sysenter.S	[PATCH] i386: more vsyscall documentation	2006-03-23 07:38:06 -08:00
vsyscall.lds.S
vsyscall.S