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Thomas Gleixner d36b49b910 [PATCH] i386 rework local apic timer calibration 
The local apic timer calibration has two problem cases:

1.  The calibration is based on readout of the PIT/HPET timer to detect the
   wrap of the periodic tick.  It happens that a box gets stuck in the
   calibration loop due to a PIT with a broken readout function.

2.  CoreDuo boxen show a sporadic PIT runs too slow defect, which results
   in a wrong lapic calibration.  The PIT goes back to normal operation once
   the lapic timer is switched to periodic mode.

Both are existing and unfixed problems in the current upstream kernel and
prevent certain laptops and other systems from booting Linux.

Rework the code to address both problems:

- Make the calibration interrupt driven.  This removes the wait_timer_tick
  magic hackery from lapic.c and time_hpet.c.  The clockevents framework
  allows easy substitution of the global tick event handler for the
  calibration.  This is more accurate than monitoring jiffies.  At this point
  of the boot process, nothing disturbes the interrupt delivery, so the
  results are very accurate.

- Verify the calibration against the PM timer, when available by using the
  early access function.  When the measured calibration period is outside of
  an one percent window, then the lapic timer calibration is adjusted to the
  pm timer result.

- Verify the calibration by running the lapic timer with the calibration
  handler.  Disable lapic timer in case of deviation.

This also removes the "synchronization" of the local apic timer to the global
tick.  This synchronization never worked, as there is no way to synchronize
PIT(HPET) and local APIC timer.  The synchronization by waiting for the tick
just alignes the local APIC timer for the first events, but later the events
drift away due to the different clocks.  Removing the "sync" is just
randomizing the asynchronous behaviour at setup time.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Zachary Amsden <zach@vmware.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Rohit Seth <rohitseth@google.com>
Cc: Andi Kleen <ak@suse.de>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-16 08:13:59 -08:00
..
mach-bigsmp
mach-default [PATCH] clockevents: i386 drivers 2007-02-16 08:13:59 -08:00
mach-es7000 ACPICA: Remove duplicate table definitions (non-conflicting), cont 2007-02-02 21:14:29 -05:00
mach-generic
mach-numaq
mach-summit [PATCH] i386: Fix compilation with UP genericarch 2006-11-28 20:12:59 +01:00
mach-visws [PATCH] visws build fix 2006-10-28 11:30:52 -07:00
mach-voyager [PATCH] clockevents: i386 drivers 2007-02-16 08:13:59 -08:00
8253pit.h
a.out.h
acpi.h ACPICA: Allow ACPI id to be u32 instead of u8. 2007-02-02 21:14:31 -05:00
agp.h
alternative-asm.i Remove all inclusions of <linux/config.h> 2006-10-04 03:38:54 -04:00
alternative.h [PATCH] paravirt: Patch inline replacements for paravirt intercepts 2006-12-07 02:14:08 +01:00
apic.h [PATCH] i386 rework local apic timer calibration 2007-02-16 08:13:59 -08:00
apicdef.h x86_64: Remove stale lapic definition from apicdef.h 2006-04-01 22:50:03 -05:00
arch_hooks.h IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
atomic.h [PATCH] Numerous fixes to kernel-doc info in source files. 2007-02-11 10:51:32 -08:00
auxvec.h
bitops.h [PATCH] Numerous fixes to kernel-doc info in source files. 2007-02-11 10:51:32 -08:00
boot.h [PATCH] i386: Restore CONFIG_PHYSICAL_START option 2007-01-05 23:55:23 -08:00
bug.h [PATCH] Generic BUG for i386 2006-12-08 08:28:39 -08:00
bugs.h [PATCH] i386: improve sched_clock() on i686 2007-02-13 13:26:22 +01:00
byteorder.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
cache.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
cacheflush.h [PATCH] Optimize D-cache alias handling on fork 2006-12-13 09:27:08 -08:00
checksum.h [NET]: I386 checksum annotations and cleanups. 2006-12-02 21:23:19 -08:00
cpu.h [PATCH] i386: introduce the mechanism of disabling cpu hotplug control 2006-12-07 02:14:10 +01:00
cpufeature.h [PATCH] i386: i386 add Intel BTS cpufeature bit and detection (take 2) 2006-12-07 02:14:11 +01:00
cputime.h
current.h [PATCH] i386: Implement "current" with the PDA 2006-12-07 02:14:03 +01:00
debugreg.h
delay.h [PATCH] paravirt: header and stubs for paravirtualisation 2006-12-07 02:14:07 +01:00
desc.h [PATCH] i386: Rename cpu_gdt_descr and remove extern declaration from smpboot.c 2007-02-13 13:26:26 +01:00
device.h ACPI: Change ACPI to use dev_archdata instead of firmware_data 2006-12-01 14:52:01 -08:00
div64.h
dma-mapping.h [PATCH] Pass struct dev pointer to dma_cache_sync() 2006-12-07 08:39:41 -08:00
dma.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
dmi.h [PATCH] x86_64: Implement early DMI scanning 2006-03-25 09:10:55 -08:00
dwarf2.h [PATCH] i386/x86-64: Work around gcc bug with noreturn functions in unwinder 2006-09-26 10:52:41 +02:00
e820.h [PATCH] compile error of register_memory() 2006-12-22 08:55:49 -08:00
edac.h [PATCH] EDAC: core EDAC support code 2006-01-18 19:20:31 -08:00
elf.h [PATCH] i386: Convert i386 PDA code to use %fs 2007-02-13 13:26:20 +01:00
emergency-restart.h
errno.h
fcntl.h
fixmap.h [PATCH] Fix CONFIG_COMPAT_VDSO 2007-01-26 13:50:58 -08:00
floppy.h IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
frame.i Remove all inclusions of <linux/config.h> 2006-10-04 03:38:54 -04:00
futex.h [PATCH] mm: pagefault_{disable,enable}() 2006-12-07 08:39:21 -08:00
genapic.h [PATCH] x86: fix the irqbalance quirk for E7320/E7520/E7525 2006-12-07 02:14:10 +01:00
hardirq.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
highmem.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
hpet.h [PATCH] clockevents: i386 drivers 2007-02-16 08:13:59 -08:00
hw_irq.h [PATCH] i386/x86_64: Remove global IO_APIC_VECTOR 2006-10-08 12:24:02 -07:00
hypertransport.h [PATCH] Initial generic hypertransport interrupt support 2006-10-04 07:55:29 -07:00
i387.h [PATCH] i386: add sleazy FPU optimization 2006-12-07 02:14:01 +01:00
i8253.h [PATCH] clockevents: i386 drivers 2007-02-16 08:13:59 -08:00
i8259.h
ide.h [PATCH] ide: more conversion to pci_get APIs 2006-12-08 08:29:03 -08:00
idle.h [PATCH] i386: add idle notifier 2007-02-13 13:26:22 +01:00
intel_arch_perfmon.h [PATCH] x86: i386/x86-64 Add nmi watchdog support for new Intel CPUs 2006-09-26 10:52:27 +02:00
io.h [PATCH] kill eth_io_copy_and_sum() 2007-02-09 09:14:07 -08:00
io_apic.h i386: clean up io-apic accesses 2006-11-01 09:11:00 -08:00
ioctl.h
ioctls.h
ipc.h
ipcbuf.h
irq.h [PATCH] x86: fix the irqbalance quirk for E7320/E7520/E7525 2006-12-07 02:14:10 +01:00
irq_regs.h [PATCH] i386: Store the interrupt regs pointer in the PDA 2006-12-07 02:14:03 +01:00
irqflags.h [PATCH] paravirt: Patch inline replacements for paravirt intercepts 2006-12-07 02:14:08 +01:00
ist.h
k8.h [PATCH] x86_64: Clean and enhance up K8 northbridge access code 2006-06-26 10:48:15 -07:00
Kbuild [PATCH] cleanup asm/setup.h userspace visibility 2006-12-07 08:39:46 -08:00
kdebug.h [PATCH] Notify page fault call chain for i386 2006-06-26 09:58:22 -07:00
kexec.h [PATCH] i386: Avoid overwriting the current pgd (V4, i386) 2006-09-26 10:52:38 +02:00
kmap_types.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
kprobes.h [PATCH] IA64: kprobe invalidate icache of jump buffer 2006-07-31 13:28:38 -07:00
ldt.h
linkage.h
local.h i386: improve and correct inline asm memory constraints 2006-07-08 15:24:18 -07:00
math_emu.h [PATCH] i386: PDA: Fix math emulator for new pt_regs 2006-12-07 02:14:03 +01:00
mc146818rtc.h
mca.h
mca_dma.h [PATCH] kernel-doc for kernel/dma.c 2006-10-03 08:03:41 -07:00
mce.h [PATCH] i386: Move mce_disabled to asm/mce.h 2007-02-13 13:26:26 +01:00
mman.h [PATCH] add asm-generic/mman.h 2006-02-15 15:32:22 -08:00
mmu.h [PATCH] vdso: randomize the i386 vDSO by moving it into a vma 2006-06-27 17:32:38 -07:00
mmu_context.h [PATCH] i386: Convert i386 PDA code to use %fs 2007-02-13 13:26:20 +01:00
mmx.h
mmzone.h [PATCH] silence unused pgdat warning from alloc_bootmem_node and friends 2006-12-07 08:39:23 -08:00
module.h [PATCH] i386: always enable regparm 2006-12-07 02:14:12 +01:00
mpspec.h [PATCH] clockevents: i386 drivers 2007-02-16 08:13:59 -08:00
mpspec_def.h [PATCH] x86-64: remove remaining pc98 code 2006-12-07 02:14:19 +01:00
msgbuf.h
msidef.h [PATCH] genirq: i386 irq: Move msi message composition into io_apic.c 2006-10-04 07:55:28 -07:00
msr.h [PATCH] Mark TSC on GeodeLX reliable 2007-02-16 08:13:58 -08:00
mtrr.h [PATCH] Don't trigger full rebuild via CONFIG_MTRR 2006-06-23 07:42:56 -07:00
mutex.h [PATCH] i386: Remove lock section support in mutex.h 2006-09-26 10:52:31 +02:00
namei.h
nmi.h [PATCH] x86: all cpu backtrace 2006-12-07 02:14:01 +01:00
numa.h
numaq.h
page.h [PATCH] Fix CONFIG_COMPAT_VDSO 2007-01-26 13:50:58 -08:00
param.h [PATCH] cleanup asm/setup.h userspace visibility 2006-12-07 08:39:46 -08:00
paravirt.h [PATCH] i386: Remove fastcall in paravirt.[ch] 2007-02-13 13:26:25 +01:00
parport.h
pci-direct.h
pci.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
pda.h [PATCH] i386: Convert i386 PDA code to use %fs 2007-02-13 13:26:20 +01:00
percpu.h [PATCH] i386: espfix cleanup 2006-12-07 02:14:01 +01:00
pgalloc.h [PATCH] MM: page allocation hooks for VMI backend 2007-02-13 13:26:21 +01:00
pgtable-2level-defs.h
pgtable-2level.h [PATCH] paravirt: fix missing pte update 2006-12-07 02:14:09 +01:00
pgtable-3level-defs.h
pgtable-3level.h [PATCH] paravirt: fix missing pte update 2006-12-07 02:14:09 +01:00
pgtable.h Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6 2006-12-07 08:59:11 -08:00
poll.h [PATCH] POLLRDHUP/EPOLLRDHUP handling for half-closed devices notifications 2006-03-25 08:22:56 -08:00
posix_types.h i386: improve and correct inline asm memory constraints 2006-07-08 15:24:18 -07:00
processor.h [PATCH] i386: add idle notifier 2007-02-13 13:26:22 +01:00
ptrace-abi.h [PATCH] Split i386 and x86_64 ptrace.h 2006-09-26 08:49:10 -07:00
ptrace.h [PATCH] i386: Profile pc badness 2007-02-13 13:26:21 +01:00
resource.h
rtc.h
rwlock.h [PATCH] i386: Clean up spin/rwlocks 2006-09-26 10:52:32 +02:00
rwsem.h [PATCH] lockdep: name some old style locks 2006-12-07 08:39:36 -08:00
scatterlist.h
seccomp.h
sections.h
segment.h [PATCH] i386: Profile pc badness 2007-02-13 13:26:21 +01:00
semaphore.h [PATCH] i386: Use early clobbers for semaphores now 2006-09-27 14:39:51 -07:00
sembuf.h
serial.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
setup.h [PATCH] i386: Remove extern declaration from mm/discontig.c, put in header. 2007-02-13 13:26:26 +01:00
shmbuf.h
shmparam.h
sigcontext.h
siginfo.h
signal.h [PATCH] headers_check: move inclusion of <linux/linkage.h> in <asm-i386/signal.h> 2006-09-13 07:32:15 -07:00
smp.h [PATCH] i386: SMP boot hook for paravirt 2007-02-13 13:26:21 +01:00
socket.h [AF_UNIX]: Datagram getpeersec 2006-06-29 16:58:06 -07:00
sockios.h
sparsemem.h
spinlock.h [PATCH] paravirt: Patch inline replacements for paravirt intercepts 2006-12-07 02:14:08 +01:00
spinlock_types.h [PATCH] Remove 'volatile' from spinlock_types 2006-12-06 14:39:53 -08:00
srat.h
stacktrace.h [PATCH] i386: Do stacktracer conversion too 2006-09-26 10:52:34 +02:00
stat.h [PATCH] 2TB files: st_blocks is invalid when calling stat64 2006-03-26 08:57:00 -08:00
statfs.h
string.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
suspend.h Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6 2006-12-07 08:59:11 -08:00
sync_bitops.h [PATCH] x86: implement always-locked bit ops, for memory shared with an SMP hypervisor 2006-09-26 08:48:55 -07:00
system.h [PATCH] paravirt: header and stubs for paravirtualisation 2006-12-07 02:14:07 +01:00
termbits.h [PATCH] tty: preparatory structures for termios revamp 2006-12-08 08:28:56 -08:00
termios.h [PATCH] consolidate line discipline number definitions 2007-02-11 10:51:26 -08:00
therm_throt.h [PATCH] x86: Add a cumulative thermal throttle event counter. 2006-09-26 10:52:42 +02:00
thread_info.h [PATCH] PM: Fix SMP races in the freezer 2006-12-13 09:05:49 -08:00
time.h [PATCH] i386: vMI timer patches 2007-02-13 13:26:21 +01:00
timer.h [PATCH] i386: vMI timer patches 2007-02-13 13:26:21 +01:00
timex.h [PATCH] Time: i386 Conversion - part 2: Rework TSC Support 2006-06-26 09:58:21 -07:00
tlb.h
tlbflush.h [PATCH] paravirt: Add MMU virtualization to paravirt_ops 2006-12-07 02:14:08 +01:00
topology.h [PATCH] sched: add option to serialize load balancing 2006-12-10 09:55:43 -08:00
tsc.h [PATCH] x86: rewrite SMP TSC sync code 2007-02-16 08:13:57 -08:00
types.h [PATCH] Centralise definitions of sector_t and blkcnt_t 2006-12-04 19:41:15 -08:00
uaccess.h [PATCH] fix sparse warnings from {asm,net}/checksum.h 2007-02-11 10:51:31 -08:00
ucontext.h
unaligned.h
unistd.h [PATCH] remove kernel syscalls 2006-12-07 08:39:37 -08:00
unwind.h Remove stack unwinder for now 2006-12-15 08:47:51 -08:00
user.h
vga.h [PATCH] vgacon: make VGA_MAP_MEM take size, remove extra use 2006-06-22 15:05:58 -07:00
vic.h [VOYAGER] fix up ptregs removal mess 2006-10-12 22:25:03 -05:00
vm86.h [PATCH] i386: Update sys_vm86 to cope with changed pt_regs and %gs usage 2006-12-07 02:14:03 +01:00
vmi.h [PATCH] i386: vMI backend for paravirt-ops 2007-02-13 13:26:21 +01:00
vmi_time.h [PATCH] i386: vMI timer patches 2007-02-13 13:26:21 +01:00
voyager.h [VOYAGER] fix up attribute packed specifiers in voyager.h 2006-10-12 22:23:18 -05:00
xor.h