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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
..
8253pit.h
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a.out.h
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acpi.h Revert "[PATCH] x86_64: Only do the clustered systems have unsynchronized TSC assumption on IBM systems" 2006-02-27 20:41:56 -08:00
agp.h
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apic.h [PATCH] x86_64: Allow to run main time keeping from the local APIC interrupt 2006-02-04 16:43:13 -08:00
apicdef.h [PATCH] x86_64: timer interrupt lockup due to pending interrupt 2006-03-25 09:10:57 -08:00
atomic.h [PATCH] atomic: add_unless cmpxchg optimise 2006-03-23 07:38:17 -08:00
auxvec.h
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bitops.h [PATCH] bitops: x86_64: use generic bitops 2006-03-26 08:57:14 -08:00
boot.h
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bootsetup.h
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bug.h [PATCH] x86-64: reduce x86-64 bug frame by 4 bytes 2005-09-12 10:50:58 -07:00
bugs.h
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byteorder.h
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cache.h [PATCH] x86_64: bring back __read_mostly support to linux-2.6.17-rc2 2006-04-20 07:58:11 -07:00
cacheflush.h [PATCH] x86/x86_64: mark rodata section read-only: x86-64 support 2006-01-06 08:33:36 -08:00
calling.h [PATCH] x86-64: Fix CFI information 2005-09-12 10:50:56 -07:00
checksum.h
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compat.h [PATCH] amd64: task_pt_regs() 2006-01-12 09:08:51 -08:00
cpu.h
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cpufeature.h [PATCH] i386/x86-64: Fix x87 information leak between processes 2006-04-20 07:58:11 -07:00
cputime.h
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current.h kbuild: alpha,x86_64 use generic asm-offsets.h support 2005-09-09 21:28:48 +02:00
debugreg.h
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delay.h
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desc.h [PATCH] x86_64: Align and pad x86_64 GDT on page boundary 2006-01-11 19:04:53 -08:00
div64.h
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dma-mapping.h [PATCH] x86_64: Use function pointers to call DMA mapping functions 2006-01-11 19:04:55 -08:00
dma.h [PATCH] x86_64: Add 4GB DMA32 zone 2005-11-14 19:55:13 -08:00
dmi.h [PATCH] x86_64: Implement early DMI scanning 2006-03-25 09:10:55 -08:00
dwarf2.h [PATCH] x86_64: Separate CONFIG_UNWIND_INFO from CONFIG_DEBUG_INFO 2006-01-11 19:01:10 -08:00
e820.h [PATCH] x86_64: Avoid EBDA area in early boot allocator 2006-05-08 09:34:56 -07:00
edac.h [PATCH] EDAC: core EDAC support code 2006-01-18 19:20:31 -08:00
elf.h [PATCH] x86_64: Increase the variability of the process stack on 64bit architectures 2006-03-25 09:10:52 -08:00
emergency-restart.h
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errno.h
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fcntl.h [PATCH] Clean up struct flock definitions 2005-09-07 16:57:38 -07:00
fixmap.h [PATCH] mark several functions __always_inline 2006-01-14 18:27:15 -08:00
floppy.h [PATCH] x86_64: Don't invoke OOM killer while allocating floppy DMA buffers 2006-03-25 09:10:55 -08:00
fpu32.h
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futex.h [PATCH] lightweight robust futexes updates 2006-03-27 08:44:49 -08:00
gart-mapping.h [PATCH] x86_64: Use function pointers to call DMA mapping functions 2006-01-11 19:04:55 -08:00
genapic.h
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hardirq.h [PATCH] i386/x86-64: Don't ack the APIC for bad interrupts when the APIC is not enabled 2006-02-04 16:43:15 -08:00
hpet.h [PATCH] x86_64: Fix drift with HPET timer enabled 2006-04-09 11:53:53 -07:00
hw_irq.h [PATCH] x86_64: Remove useless KDB vector 2006-01-11 19:05:00 -08:00
i387.h [PATCH] i386/x86-64: Fix x87 information leak between processes 2006-04-20 07:58:11 -07:00
ia32.h [PATCH] x86_64: Flexmap for 32bit and randomized mappings for 64bit 2006-01-16 23:18:35 -08:00
ia32_unistd.h [PATCH] x86_64: Eliminate IA32_NR_syscalls define 2006-04-09 11:53:53 -07:00
ide.h
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idle.h [PATCH] x86_64: Add idle notifiers 2006-01-11 19:04:55 -08:00
io.h [PATCH] x86_64: inline function prefix with __always_inline in vsyscall 2006-04-11 06:38:57 -07:00
io_apic.h [PATCH] x86_64: avoid IRQ0 ioapic pin collision 2006-05-08 09:34:56 -07:00
ioctl.h [PATCH] Generic ioctl.h 2006-01-10 08:01:34 -08:00
ioctls.h
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ipcbuf.h
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ipi.h [PATCH] x86_64: Remove useless KDB vector 2006-01-11 19:05:00 -08:00
irq.h [PATCH] x86_64: Increase NR_IRQ_VECTORS to 32 * NR_CPUS 2006-01-16 11:27:59 -08:00
kdebug.h [PATCH] Notifier chain update: API changes 2006-03-27 08:44:50 -08:00
kexec.h [PATCH] Compilation of kexec/kdump broken 2006-02-03 08:32:09 -08:00
kmap_types.h
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kprobes.h [PATCH] kprobes: fix build breakage 2006-01-10 08:01:40 -08:00
ldt.h
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linkage.h
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local.h [PATCH] make local_t signed 2006-03-31 12:18:55 -08:00
mach_apic.h
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mc146818rtc.h
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mce.h [PATCH] x86_64: Don't run NMI watchdog during machine checks 2006-04-09 11:53:52 -07:00
mman.h [PATCH] add asm-generic/mman.h 2006-02-15 15:32:22 -08:00
mmsegment.h
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mmu.h
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mmu_context.h [PATCH] x86_64: {set,clear,test}_bit() related cleanup and pci_mmcfg_init() fix 2006-03-24 07:33:15 -08:00
mmx.h
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mmzone.h [PATCH] x86_64: Increase NUMA hash function nodemap 2006-04-18 10:39:19 -07:00
module.h
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mpspec.h Pull pnpacpi into acpica branch 2006-01-07 03:50:18 -05:00
msgbuf.h
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msi.h [PATCH] PCI: Change MSI to use physical delivery mode always 2005-11-10 16:09:18 -08:00
msr.h [PATCH] Fix x86_64/msr.h interface to agree with i386/msr.h 2005-11-20 11:52:59 -08:00
mtrr.h [PATCH] Clean up mtrr compat ioctl code 2005-10-30 17:37:13 -08:00
mutex.h Fix mutex_trylock() copy-and-paste bug (x86, x86-64, generic mutex-dec.h) 2006-01-11 15:50:47 -08:00
namei.h
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nmi.h
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node.h
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numa.h [PATCH] Configurable NODES_SHIFT 2006-04-11 06:18:39 -07:00
page.h [PATCH] unify pfn_to_page: x86_64 pfn_to_page 2006-03-27 08:44:44 -08:00
param.h [PATCH] Avoid namespace pollution in <asm/param.h> 2006-01-02 08:38:38 -08:00
parport.h
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pci-direct.h
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pci.h [PATCH] x86_64: no_iommu removal in pci-gart.c 2006-02-26 09:53:29 -08:00
pda.h [PATCH] x86_64: Reorder one field of the PDA to reduce padding 2006-03-25 09:10:56 -08:00
percpu.h [PATCH] for_each_possible_cpu: x86_64 2006-04-19 09:13:49 -07:00
pgalloc.h [PATCH] x86_64: actively synchronize vmalloc area when registering certain callbacks 2006-03-25 09:10:53 -08:00
pgtable.h [PATCH] x86_64: actively synchronize vmalloc area when registering certain callbacks 2006-03-25 09:10:53 -08:00
poll.h [PATCH] POLLRDHUP/EPOLLRDHUP handling for half-closed devices notifications 2006-03-25 08:22:56 -08:00
posix_types.h
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prctl.h
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processor.h [PATCH] arch/i386/kernel/microcode.c: remove the obsolete microcode_ioctl 2006-03-28 09:16:06 -08:00
proto.h [PATCH] x86_64: Removed duplicated declaration of force_iommu 2006-03-25 09:14:39 -08:00
ptrace.h
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resource.h
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rtc.h
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rwlock.h [PATCH] Fix typo in x86_64 __build_write_lock_const assembly 2005-12-24 12:30:22 -08:00
scatterlist.h
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seccomp.h
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sections.h
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segment.h [PATCH] x86_64: Remove unused segments 2006-01-11 19:05:01 -08:00
semaphore.h [PATCH] semaphore: Remove __MUTEX_INITIALIZER() 2005-10-30 17:37:27 -08:00
sembuf.h
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serial.h
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setup.h
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shmbuf.h
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shmparam.h
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sigcontext.h
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sigcontext32.h
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siginfo.h
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signal.h [PATCH] Replace extern inline with static inline in asm-x86_64/* 2005-09-12 10:50:56 -07:00
smp.h [PATCH] sched: new sched domain for representing multi-core 2006-03-27 08:44:43 -08:00
socket.h
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sockios.h
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sparsemem.h
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spinlock.h [PATCH] x86_64: Use int operations in spinlocks to support more than 128 CPUs spinning. 2005-11-14 19:55:15 -08:00
spinlock_types.h [PATCH] spinlock consolidation 2005-09-10 10:06:21 -07:00
stat.h
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statfs.h
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string.h [PATCH] x86_64: Don't define string functions to builtin 2006-03-25 09:10:53 -08:00
suspend.h [PATCH] x86_64: eliminate set_debug() 2006-03-25 09:10:52 -08:00
swiotlb.h [PATCH] x86_64: Use function pointers to call DMA mapping functions 2006-01-11 19:04:55 -08:00
system.h [PATCH] x86_64: eliminate set_debug() 2006-03-25 09:10:52 -08:00
termbits.h
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termios.h
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thread_info.h [PATCH] death of get_thread_info/put_thread_info 2006-01-12 09:08:59 -08:00
timex.h [PATCH] x86_64: fix sync before RDTSC on Intel cpus 2006-04-11 06:38:57 -07:00
tlb.h
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tlbflush.h [PATCH] x86-64: Increase TLB flush array size 2005-09-12 10:49:58 -07:00
topology.h [PATCH] sched: new sched domain for representing multi-core 2006-03-27 08:44:43 -08:00
types.h
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uaccess.h [PATCH] mark several functions __always_inline 2006-01-14 18:27:15 -08:00
ucontext.h
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unaligned.h
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unistd.h [PATCH] Add support for the sys_vmsplice syscall 2006-04-26 10:59:21 +02:00
user.h
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user32.h
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vga.h
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vsyscall.h [PATCH] x86_64: sparse warning cleanups 2006-01-11 19:05:02 -08:00
vsyscall32.h
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xor.h
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