Jan Beulich a3c6018e56 x86: fix assumed to be contiguous leaf page tables for kmap_atomic region (take 2) ... Debugging and original patch from Nick Piggin <npiggin@suse.de> The early fixmap pmd entry inserted at the very top of the KVA is causing the subsequent fixmap mapping code to not provide physically linear pte pages over the kmap atomic portion of the fixmap (which relies on said property to calculate pte addresses). This has caused weird boot failures in kmap_atomic much later in the boot process (initial userspace faults) on a 32-bit PAE system with a larger number of CPUs (smaller CPU counts tend not to run over into the next page so don't show up the problem). Solve this by attempting to clear out the page table, and copy any of its entries to the new one. Also, add a bug if a nonlinear condition is encountered and can't be resolved, which might save some hours of debugging if this fragile scheme ever breaks again... Once we have such logic, we can also use it to eliminate the early ioremap trickery around the page table setup for the fixmap area. This also fixes potential issues with FIX_* entries sharing the leaf page table with the early ioremap ones getting discarded by early_ioremap_clear() and not restored by early_ioremap_reset(). It at once eliminates the temporary (and configuration, namely NR_CPUS, dependent) unavailability of early fixed mappings during the time the fixmap area page tables get constructed. Finally, also replace the hard coded calculation of the initial table space needed for the fixmap area with a proper one, allowing kernels configured for large CPU counts to actually boot. Based-on: Nick Piggin <npiggin@suse.de> Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>		2009-01-16 13:47:04 +01:00
..
bigsmp
es7000	Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-01-10 06:13:09 -08:00
mach-default	x86: fix apic.c build error on latest git	2009-01-12 19:24:23 +01:00
mach-generic	x86: rename mp_config_table to mpc_table	2009-01-04 13:22:58 +01:00
mach-rdc321x
mach-voyager
numaq	Merge branches 'x86/cleanups', 'x86/mpparse', 'x86/numa' and 'x86/uv' into x86/urgent	2009-01-06 17:39:52 +01:00
summit	Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2009-01-10 06:13:09 -08:00
uv	x86: uv_bau.h: fix dubious bitfield	2008-12-30 13:31:37 -08:00
visws
xen
a.out-core.h
a.out.h
acpi.h
agp.h
alternative-asm.h
alternative.h
amd_iommu_types.h	AMD IOMMU: add init code for statistic collection	2009-01-03 14:11:58 +01:00
amd_iommu.h
apic.h	x86: apic.c: xapic_icr_read and x2apic_icr_read should be static	2008-12-30 13:31:28 -08:00
apicdef.h
arch_hooks.h
asm.h
atomic_32.h	atomic_t: unify all arch definitions	2009-01-06 15:59:10 -08:00
atomic_64.h	atomic_t: unify all arch definitions	2009-01-06 15:59:10 -08:00
atomic.h
auxvec.h
bios_ebda.h
bitops.h	x86, generic: mark complex bitops.h inlines as __always_inline	2009-01-13 18:56:30 +01:00
boot.h
bootparam.h
bug.h
bugs.h
byteorder.h	x86: introduce asm/swab.h	2009-01-06 18:10:27 -08:00
cache.h
cacheflush.h
calgary.h
calling.h
checksum_32.h
checksum_64.h
checksum.h
cmpxchg_32.h
cmpxchg_64.h
cmpxchg.h
compat.h
cpu.h
cpufeature.h
cputime.h
current.h
debugreg.h
delay.h
desc_defs.h
desc.h	x86: fix lguest used_vectors breakage, -v2	2008-12-23 22:37:28 +01:00
device.h
div64.h
dma-mapping.h	Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2008-12-30 16:10:19 -08:00
dma.h
dmi.h
ds.h
dwarf2.h
e820.h
edac.h
efi.h	x86: efi.c declare add_efi_memmap before they get used	2008-12-29 18:17:32 +01:00
elf.h	[S390] arch_setup_additional_pages arguments	2008-12-25 13:38:54 +01:00
emergency-restart.h
errno.h
fb.h
fcntl.h
fixmap_32.h
fixmap_64.h
fixmap.h
floppy.h
frame.h
ftrace.h
futex.h
gart.h
genapic_32.h	x86: rename mpc_config_processor to mpc_cpu	2009-01-04 13:23:00 +01:00
genapic_64.h
genapic.h
geode.h
gpio.h
hardirq_32.h
hardirq_64.h
hardirq.h
highmem.h
hpet.h
hugetlb.h
hw_irq.h
hypertransport.h
hypervisor.h
i387.h
i8253.h
i8259.h
ia32_unistd.h
ia32.h
idle.h
intel_arch_perfmon.h
io_32.h
io_64.h
io_apic.h	Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2008-12-30 16:20:19 -08:00
io.h	x86: fix assumed to be contiguous leaf page tables for kmap_atomic region (take 2)	2009-01-16 13:47:04 +01:00
ioctl.h
ioctls.h
iomap.h
iommu.h	Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2008-12-30 16:10:19 -08:00
ipcbuf.h
ipi.h
irq_regs_32.h
irq_regs_64.h
irq_regs.h
irq_remapping.h
irq_vectors.h
irq.h	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask into merge-rr-cpumask	2009-01-03 18:53:31 +01:00
irqflags.h
ist.h
k8.h
Kbuild	x86: introduce asm/swab.h	2009-01-06 18:10:27 -08:00
kdebug.h
kexec.h
kgdb.h
kmap_types.h
kprobes.h
kvm_host.h	KVM: change KVM to use IOMMU API	2009-01-03 14:11:07 +01:00
kvm_para.h
kvm_x86_emulate.h	KVM: x86 emulator: add Src2 decode set	2008-12-31 16:55:42 +02:00
kvm.h
ldt.h
lguest_hcall.h
lguest.h	x86: cleanup some remaining usages of NR_CPUS where s/b nr_cpu_ids	2009-01-03 19:00:55 +01:00
linkage.h
local.h
math_emu.h
mc146818rtc.h
mca_dma.h
mca.h
mce.h
microcode.h
mman.h
mmconfig.h
mmu_context_32.h
mmu_context_64.h
mmu_context.h
mmu.h
mmx.h
mmzone_32.h
mmzone_64.h
mmzone.h
module.h
mpspec_def.h	x86: rename all fields of mpc_table mpc_X to X	2009-01-05 14:08:34 +01:00
mpspec.h	x86: apic.c declare pic_mode before they get used	2008-12-29 18:17:30 +01:00
msgbuf.h
msidef.h
msr-index.h
msr.h	Merge branch 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2008-12-28 12:21:10 -08:00
mtrr.h	x86, mtrr: fix types used in userspace exported header	2009-01-08 16:13:59 +01:00
mutex_32.h
mutex_64.h
mutex.h
nmi.h
nops.h
numa_32.h
numa_64.h
numa.h
numaq.h
olpc.h
page_32.h
page_64.h
page.h
param.h
paravirt.h
parport.h
pat.h
pci_32.h
pci_64.h
pci_x86.h	x86, pci: move arch/x86/pci/pci.h to arch/x86/include/asm/pci_x86.h	2008-12-29 18:17:36 +01:00
pci-direct.h
pci.h	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6	2008-12-31 23:05:57 +10:30
pda.h
percpu.h
pgalloc.h
pgtable_32.h
pgtable_64.h
pgtable-2level-defs.h
pgtable-2level.h
pgtable-3level-defs.h
pgtable-3level.h
pgtable.h
poll.h
posix_types_32.h
posix_types_64.h
posix_types.h
prctl.h
processor-cyrix.h
processor-flags.h
processor.h	Merge branch 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2008-12-28 12:21:10 -08:00
proto.h
ptrace-abi.h
ptrace.h
pvclock-abi.h
pvclock.h
reboot_fixups.h
reboot.h
required-features.h
resource.h
resume-trace.h
rio.h
rtc.h
rwlock.h
rwsem.h
scatterlist.h
seccomp_32.h
seccomp_64.h
seccomp.h
sections.h
segment.h
sembuf.h
serial.h
setup.h	x86: rename mpc_config_oemtable to mpc_oemtable	2009-01-04 13:23:02 +01:00
shmbuf.h
shmparam.h
sigcontext32.h
sigcontext.h
sigframe.h
siginfo.h
signal.h
smp.h	x86: cleanup remaining cpumask_t ops in smpboot code	2009-01-04 15:39:26 +01:00
socket.h
sockios.h
sparsemem.h
spinlock_types.h
spinlock.h
srat.h
stacktrace.h
stat.h
statfs.h
string_32.h
string_64.h
string.h
suspend_32.h
suspend_64.h
suspend.h
svm.h	KVM: SVM: move svm.h to include/asm	2008-12-31 16:52:28 +02:00
swab.h	x86: introduce asm/swab.h	2009-01-06 18:10:27 -08:00
swiotlb.h	swiotlb: replace architecture-specific swiotlb.h with linux/swiotlb.h	2008-12-28 10:04:00 +01:00
sync_bitops.h
sys_ia32.h	x86: introducing asm/sys_ia32.h	2008-12-29 13:18:40 +01:00
syscall.h
syscalls.h
system_64.h
system.h
tce.h
termbits.h
termios.h
therm_throt.h
thread_info.h	Merge branch 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2008-12-28 12:21:10 -08:00
time.h
timer.h
timex.h
tlb.h
tlbflush.h
topology.h	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask into merge-rr-cpumask	2009-01-03 18:53:31 +01:00
trampoline.h
traps.h
tsc.h
types.h
uaccess_32.h
uaccess_64.h
uaccess.h	Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2008-12-30 16:10:19 -08:00
ucontext.h
unaligned.h
unistd_32.h
unistd_64.h
unistd.h
user32.h
user_32.h
user_64.h
user.h
vdso.h
vga.h
vgtod.h
vic.h
virtext.h	x86: cpu_emergency_svm_disable() function	2008-12-31 16:52:30 +02:00
vm86.h
vmi_time.h
vmi.h
vmware.h
vmx.h	KVM: VMX: move ASM_VMX_* definitions from asm/kvm_host.h to asm/vmx.h	2008-12-31 16:52:28 +02:00
voyager.h
vsyscall.h
xcr.h
xor_32.h
xor_64.h
xor.h
xsave.h