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e59a1bb2fd
android_kernel_xiaomi_sm8350/arch/x86/kernel
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Tejun Heo e59a1bb2fd x86: fix pageattr handling for lpage percpu allocator and re-enable it 
lpage allocator aliases a PMD page for each cpu and returns whatever
is unused to the page allocator.  When the pageattr of the recycled
pages are changed, this makes the two aliases point to the overlapping
regions with different attributes which isn't allowed and known to
cause subtle data corruption in certain cases.

This can be handled in simliar manner to the x86_64 highmap alias.
pageattr code should detect if the target pages have PMD alias and
split the PMD alias and synchronize the attributes.

pcpur allocator is updated to keep the allocated PMD pages map sorted
in ascending address order and provide pcpu_lpage_remapped() function
which binary searches the array to determine whether the given address
is aliased and if so to which address.  pageattr is updated to use
pcpu_lpage_remapped() to detect the PMD alias and split it up as
necessary from cpa_process_alias().

Jan Beulich spotted the original problem and incorrect usage of vaddr
instead of laddr for lookup.

With this, lpage percpu allocator should work correctly.  Re-enable
it.

[ Impact: fix subtle lpage pageattr bug and re-enable lpage ]

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Jan Beulich <JBeulich@novell.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ingo Molnar <mingo@elte.hu>
2009-06-22 11:56:24 +09:00
..
acpi gcov: enable GCOV_PROFILE_ALL for x86_64 2009-06-18 13:03:58 -07:00
apic x86, ioapic: Don't call disconnect_bsp_APIC if no APIC present 2009-06-17 20:24:39 +02:00
cpu Merge branch 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-06-20 11:29:32 -07:00
.gitignore
alternative.c
amd_iommu_init.c amd-iommu: resume cleanup 2009-06-16 10:19:16 +02:00
amd_iommu.c amd-iommu: flush domain tlb when attaching a new device 2009-06-15 15:42:00 +02:00
aperture_64.c
apm_32.c PM core: rename suspend and resume functions 2009-06-12 21:32:31 +02:00
asm-offsets_32.c lguest: optimize by coding restore_flags and irq_enable in assembler. 2009-06-12 22:27:03 +09:30
asm-offsets_64.c x86, boot: make kernel_alignment adjustable; new bzImage fields 2009-05-11 17:44:39 -07:00
asm-offsets.c
audit_64.c
bios_uv.c
bootflag.c
check.c
cpuid.c Driver Core: x86: add nodename for cpuid and msr drivers. 2009-06-15 21:30:25 -07:00
crash_dump_32.c
crash_dump_64.c
crash.c x86: disable IOMMUs on kernel crash 2009-06-15 15:20:40 +02:00
doublefault_32.c
ds_selftest.c
ds_selftest.h
ds.c
dumpstack_32.c
dumpstack_64.c
dumpstack.c
dumpstack.h
e820.c x86/pci: remove rounding quirk from e820_setup_gap() 2009-05-11 09:45:14 +02:00
early_printk.c
early-quirks.c
efi_32.c
efi_64.c
efi_stub_32.S
efi_stub_64.S
efi.c x86: correct the conversion of EFI memory types 2009-06-16 17:47:32 -07:00
entry_32.S Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-06-20 10:56:46 -07:00
entry_64.S function-graph: add stack frame test 2009-06-18 18:40:18 -04:00
ftrace.c function-graph: add stack frame test 2009-06-18 18:40:18 -04:00
geode_32.c
head32.c
head64.c
head_32.S x86: de-assembler-ize asm/desc.h 2009-06-17 21:35:10 -07:00
head_64.S x86: de-assembler-ize asm/desc.h 2009-06-17 21:35:10 -07:00
head.c
hpet.c x86: hpet: Mark per cpu interrupts IRQF_TIMER to prevent resume failure 2009-06-14 18:24:29 +02:00
i386_ksyms_32.c
i387.c
i8237.c
i8253.c time: move PIT_TICK_RATE to linux/timex.h 2009-06-16 19:47:27 -07:00
i8259.c
init_task.c mm: consolidate init_mm definition 2009-06-16 19:47:28 -07:00
io_delay.c
ioport.c
irq_32.c
irq_64.c
irq.c Merge branch 'linus' into x86/mce3 2009-06-11 23:31:52 +02:00
irqinit.c Merge branch 'linus' into x86/mce3 2009-06-11 23:31:52 +02:00
k8.c
kdebugfs.c
kgdb.c Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-06-10 15:49:10 -07:00
kprobes.c
kvm.c Merge branch 'kvm-updates/2.6.31' of git://git.kernel.org/pub/scm/virt/kvm/kvm 2009-06-11 10:03:30 -07:00
kvmclock.c
ldt.c
machine_kexec_32.c x86, kexec: fix crashdump panic with CONFIG_KEXEC_JUMP 2009-05-07 22:01:05 -07:00
machine_kexec_64.c x86, kexec: fix crashdump panic with CONFIG_KEXEC_JUMP 2009-05-07 22:01:05 -07:00
Makefile gcov: enable GCOV_PROFILE_ALL for x86_64 2009-06-18 13:03:58 -07:00
mca_32.c
mfgpt_32.c
microcode_amd.c x86, microcode: Simplify vfree() use 2009-06-07 16:35:11 +02:00
microcode_core.c Driver Core: misc: add nodename support for misc devices. 2009-06-15 21:30:25 -07:00
microcode_intel.c x86: microcode: use smp_call_function_single instead of set_cpus_allowed, cleanup of synchronization logic 2009-05-12 10:36:44 +02:00
mmconf-fam10h_64.c
module.c module: cleanup FIXME comments about trimming exception table entries. 2009-06-12 21:47:05 +09:30
mpparse.c x86, irq: don't call mp_config_acpi_gsi() if update_mptable is not enabled 2009-05-18 09:33:29 +02:00
msr.c Driver Core: x86: add nodename for cpuid and msr drivers. 2009-06-15 21:30:25 -07:00
olpc.c
paravirt_patch_32.c
paravirt_patch_64.c
paravirt-spinlocks.c
paravirt.c Merge branch 'x86-xen-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-06-10 16:16:27 -07:00
pci-calgary_64.c
pci-dma.c amd-iommu: disable IOMMU hardware on shutdown 2009-06-15 15:20:40 +02:00
pci-gart_64.c x86: enable GART-IOMMU only after setting up protection methods 2009-06-06 09:42:09 +02:00
pci-nommu.c
pci-swiotlb.c Merge commit 'v2.6.30-rc5' into core/iommu 2009-05-11 14:44:31 +02:00
pcspeaker.c
pmtimer_64.c
probe_roms_32.c
process_32.c Merge branch 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-06-10 19:53:40 -07:00
process_64.c Merge branch 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-06-10 19:53:40 -07:00
process.c kmemcheck: add mm functions 2009-06-15 12:40:03 +02:00
ptrace.c x86, bts, mm: clean up buffer allocation 2009-04-24 10:18:52 +02:00
pvclock.c
quirks.c Merge branch 'linus' into x86/cpu 2009-06-07 12:22:15 +02:00
reboot_fixups_32.c
reboot.c x86: Add quirk for reboot stalls on a Dell Optiplex 360 2009-06-07 15:51:20 +02:00
relocate_kernel_32.S
relocate_kernel_64.S
rtc.c
scx200_32.c
setup_percpu.c x86: fix pageattr handling for lpage percpu allocator and re-enable it 2009-06-22 11:56:24 +09:00
setup.c x86: handle initrd that extends into unusable memory 2009-06-11 15:19:13 -07:00
signal.c Merge branch 'linus' into x86/mce3 2009-06-11 23:31:52 +02:00
smp.c Merge branch 'linus' into x86/mce3 2009-06-11 23:31:52 +02:00
smpboot.c x86: make zap_low_mapping could be used early 2009-06-12 13:50:24 +03:00
stacktrace.c x86: add save_stack_trace_bp() for tracing from a specific stack frame 2009-06-12 23:01:05 +02:00
step.c
sys_i386_32.c
sys_x86_64.c
syscall_64.c
syscall_table_32.S Merge branch 'core/signal' into perfcounters/core 2009-04-30 21:16:49 +02:00
tce_64.c
test_nx.c
test_rodata.c
time_32.c
time_64.c
tlb_uv.c Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-06-10 16:15:14 -07:00
tls.c
tls.h
topology.c
trampoline_32.S
trampoline_64.S
trampoline.c
traps.c Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-06-20 10:49:48 -07:00
tsc_sync.c x86: clean up arch/x86/kernel/tsc_sync.c a bit 2009-05-07 09:32:10 +02:00
tsc.c Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-06-20 10:57:40 -07:00
uv_irq.c
uv_sysfs.c
uv_time.c
verify_cpu_64.S
visws_quirks.c
vm86_32.c Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-06-10 16:15:14 -07:00
vmi_32.c
vmiclock_32.c
vmlinux.lds.S x86: Provide _sdata in the vmlinux.lds.S file 2009-06-12 09:21:33 +02:00
vsmp_64.c
vsyscall_64.c x86: move rdtsc_barrier() into the TSC vread method 2009-05-28 14:15:54 +02:00
x8664_ksyms_64.c
xsave.c