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linux/arch/x86_64/kernel
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Andi Kleen ac71d12c99 [PATCH] x86_64: Avoid EBDA area in early boot allocator 
Based on analysis&patch from Robert Hentosch

Observed on a Dell PE6850 with 16GB

The problem occurs very early on, when the kernel allocates space for the
temporary memory map called bootmap. The bootmap overlaps the EBDA region.
EBDA region is not historically reserved in the e820 mapping. When the
bootmap is freed it marks the EBDA region as usable.

If you notice in setup.c there is already code to work around the EBDA
in reserve_ebda_region(), this check however occurs after the bootmap
is allocated and doesn't prevent the bootmap from using this range.

AK: I redid the original patch. Thanks also to Jan Beulich for
spotting some mistakes.

Cc: Robert_Hentosch@dell.com
Cc: jbeulich@novell.com
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-05-08 09:34:56 -07:00
..
acpi [ACPI] Avoid BIOS inflicted crashes by evaluating _PDC only once 2005-12-01 01:30:35 -05:00
cpufreq Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
aperture.c [PATCH] x86_64: Rename e820_mapped to e820_any_mapped 2006-04-09 11:53:17 -07:00
apic.c [PATCH] Don't pass boot parameters to argv_init[] 2006-03-31 12:18:53 -08:00
asm-offsets.c [PATCH] x86_64: Allow nesting of int3 by default for kprobes 2006-01-16 11:27:58 -08:00
crash_dump.c [PATCH] kdump: read previous kernel's memory 2006-01-10 08:01:28 -08:00
crash.c [PATCH] kdump: x86_64 save cpu registers upon crash 2006-01-10 08:01:28 -08:00
e820.c [PATCH] x86_64: Avoid EBDA area in early boot allocator 2006-05-08 09:34:56 -07:00
early_printk.c [PATCH] Don't pass boot parameters to argv_init[] 2006-03-31 12:18:53 -08:00
entry.S [PATCH] x86_64: When user could have changed RIP always force IRET 2006-04-09 11:53:52 -07:00
functionlist [PATCH] x86_64: Basic reorder infrastructure 2006-03-25 09:10:56 -08:00
genapic_cluster.c [PATCH] x86_64/i386: Remove preempt disable calls in lowlevel IPI 2006-01-11 19:01:57 -08:00
genapic_flat.c [PATCH] x86_64/i386: Remove preempt disable calls in lowlevel IPI 2006-01-11 19:01:57 -08:00
genapic.c [PATCH] x86-64: Use physflat on Intel for < 8 CPUs with CPU hotplug 2005-09-12 10:50:56 -07:00
head64.c [PATCH] i386/x86-64: make setup_early_printk() usage consistent 2006-01-11 19:05:04 -08:00
head.S [PATCH] x86_64: Patch to make the head.S-must-be-first-in-vmlinux order explicit 2006-03-25 09:10:55 -08:00
i387.c [PATCH] amd64: task_thread_info() 2006-01-12 09:08:51 -08:00
i8259.c [PATCH] amd64: task_thread_info() 2006-01-12 09:08:51 -08:00
init_task.c [PATCH] Change maxaligned_in_smp alignemnt macros to internodealigned_in_smp macros 2006-01-08 20:13:38 -08:00
io_apic.c [PATCH] x86_64: avoid IRQ0 ioapic pin collision 2006-05-08 09:34:56 -07:00
ioport.c [PATCH] capable/capability.h (arch/) 2006-01-11 18:42:14 -08:00
irq.c [PATCH] more for_each_cpu() conversions 2006-03-23 07:38:17 -08:00
kprobes.c [PATCH] Switch Kprobes inline functions to __kprobes for x86_64 2006-04-19 09:13:53 -07:00
ldt.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
machine_kexec.c [PATCH] fix kexec asm 2006-03-08 14:15:04 -08:00
Makefile [PATCH] DMI: move dmi_scan.c from arch/i386 to drivers/firmware/ 2006-04-14 11:41:25 -07:00
mce_amd.c [PATCH] Remove __devinit and __cpuinit from notifier_call definitions 2006-04-26 08:30:03 -07:00
mce_intel.c [PATCH] x86_64: Some housekeeping in local APIC code 2006-01-11 19:05:03 -08:00
mce.c [PATCH] Remove __devinit and __cpuinit from notifier_call definitions 2006-04-26 08:30:03 -07:00
module.c [PATCH] uml: kludgy compilation fixes for x86-64 subarch modules support 2005-05-05 16:36:33 -07:00
mpparse.c [PATCH] x86_64: avoid IRQ0 ioapic pin collision 2006-05-08 09:34:56 -07:00
nmi.c [PATCH] x86_64: Don't run NMI watchdog during machine checks 2006-04-09 11:53:52 -07:00
pci-dma.c [PATCH] x86_64: Fix compilation with CONFIG_PCI=n / allnoconfig 2006-04-09 11:53:51 -07:00
pci-gart.c [PATCH] x86_64: Check for too many northbridges in IOMMU code 2006-05-08 09:34:56 -07:00
pci-nommu.c [PATCH] x86_64: IOMMU printk cleanup 2006-02-04 16:43:15 -08:00
pci-swiotlb.c [PATCH] x86_64: IOMMU printk cleanup 2006-02-04 16:43:15 -08:00
pmtimer.c [PATCH] Don't pass boot parameters to argv_init[] 2006-03-31 12:18:53 -08:00
process.c [PATCH] i386/x86-64: Fix x87 information leak between processes 2006-04-20 07:58:11 -07:00
ptrace.c [PATCH] drop task argument of audit_syscall_{entry,exit} 2006-05-01 06:06:18 -04:00
reboot.c [PATCH] i386/x86-64: Don't IPI to offline cpus on shutdown 2006-01-11 19:04:50 -08:00
relocate_kernel.S [PATCH] kexec: x86_64 kexec implementation 2005-06-25 16:24:50 -07:00
setup64.c [PATCH] Don't pass boot parameters to argv_init[] 2006-03-31 12:18:53 -08:00
setup.c [PATCH] x86_64: Avoid EBDA area in early boot allocator 2006-05-08 09:34:56 -07:00
signal.c [PATCH] swsusp: finally solve mysqld problem 2006-03-23 07:38:08 -08:00
smp.c [PATCH] x86_64: Use cpumask bitops for cpu_vm_mask 2006-03-25 09:10:56 -08:00
smpboot.c [PATCH] Don't pass boot parameters to argv_init[] 2006-03-31 12:18:53 -08:00
suspend_asm.S [PATCH] x86_64: Set up safe page tables during resume 2005-10-10 08:36:46 -07:00
suspend.c [PATCH] x86_64: Align and pad x86_64 GDT on page boundary 2006-01-11 19:04:53 -08:00
sys_x86_64.c [PATCH] x86_64: Use common sys_time64 2005-11-14 19:55:17 -08:00
syscall.c [PATCH] x86/x86_64: mark rodata section read-only: make some datastructures const 2006-01-06 08:33:36 -08:00
time.c [PATCH] x86_64: Fix drift with HPET timer enabled 2006-04-09 11:53:53 -07:00
trampoline.S [PATCH] x86_64: Fix SMP bootup with CONFIG_KDUMP enabled 2006-01-11 19:09:58 -08:00
traps.c [PATCH] x86_64: add nmi_exit to die_nmi 2006-05-08 09:34:56 -07:00
vmlinux.lds.S [PATCH] x86_64: Fixup read_mostly section on internode cache line size for vSMP 2006-04-09 11:53:52 -07:00
vsmp.c [PATCH] x86_64: Inclusion of ScaleMP vSMP architecture patches - vsmp_arch 2006-01-11 19:05:01 -08:00
vsyscall.c [PATCH] x86_64: Use standard __always_inline in vsyscall.c 2006-01-11 19:04:58 -08:00
x8664_ksyms.c [PATCH] No arch-specific strpbrk implementations 2006-04-11 06:18:40 -07:00