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Ingo Molnar 9029a5e380 perf_counter: x86: Protect against infinite loops in intel_pmu_handle_irq() 
intel_pmu_handle_irq() can lock up in an infinite loop if the hardware
does not allow the acking of irqs. Alas, this happened in testing so
make this robust and emit a warning if it happens in the future.

Also, clean up the IRQ handlers a bit.

[ Impact: improve perfcounter irq/nmi handling robustness ]

Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-15 09:47:06 +02:00
..
acpi
Merge branch 'linus' into release
2009-04-05 02:14:15 -04:00
apic
Merge branch 'linus' into perfcounters/core
2009-04-29 14:47:05 +02:00
cpu
perf_counter: x86: Protect against infinite loops in intel_pmu_handle_irq()
2009-05-15 09:47:06 +02:00
.gitignore
…
alternative.c
x86: expand irq-off region in text_poke()
2009-03-10 16:24:23 +01:00
amd_iommu_init.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux-2.6-iommu
2009-01-03 12:03:52 -08:00
amd_iommu.c
Merge git://git.infradead.org/iommu-2.6
2009-04-03 10:36:57 -07:00
aperture_64.c
aperture_64.c: clarify that too small aperture is valid reason for this code
2008-11-28 15:24:39 +01:00
apm_32.c
Merge branch 'cpumask-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-03-31 13:33:50 +10:30
asm-offsets_32.c
pm: rework includes, remove arch ifdefs
2009-04-01 08:59:16 -07:00
asm-offsets_64.c
pm: rework includes, remove arch ifdefs
2009-04-01 08:59:16 -07:00
asm-offsets.c
…
audit_64.c
…
bios_uv.c
x86, UV: system table in bios accessed after unmap
2009-04-03 19:25:57 +02:00
bootflag.c
…
check.c
x86: fix 64k corruption-check
2009-03-15 07:03:15 +01:00
cpuid.c
Merge branch 'cpus4096-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-01-03 12:04:39 -08:00
crash_dump_32.c
kdump: make elfcorehdr_addr independent of CONFIG_PROC_VMCORE
2008-10-20 08:52:39 -07:00
crash_dump_64.c
kdump: make elfcorehdr_addr independent of CONFIG_PROC_VMCORE
2008-10-20 08:52:39 -07:00
crash.c
x86, apic: remove duplicate asm/apic.h inclusions
2009-02-17 17:52:44 +01:00
doublefault_32.c
x86: fix virt_addr_valid() with CONFIG_DEBUG_VIRTUAL=y, v2
2008-10-13 10:33:15 +02:00
ds.c
x86, pebs: correct qualifier passed to ds_write_config() from ds_request_pebs()
2009-03-06 16:13:15 +01:00
dumpstack_32.c
ftrace: print real return in dumpstack for function graph
2008-12-03 08:56:25 +01:00
dumpstack_64.c
x86-64: Move current task from PDA to per-cpu and consolidate with 32-bit.
2009-01-19 00:38:58 +09:00
dumpstack.c
Merge commit 'origin/master' into next
2009-03-30 14:04:53 +11:00
dumpstack.h
ftrace: print real return in dumpstack for function graph
2008-12-03 08:56:25 +01:00
e820.c
x86: e820 fix various signedness issues in setup.c and e820.c
2009-03-23 15:02:05 +05:30
early_printk.c
x86: properly __init-annotate recent early_printk additions
2009-03-13 02:37:18 +01:00
early-quirks.c
x86: only scan the root bus in early PCI quirks
2009-01-09 12:46:22 -08:00
efi_32.c
…
efi_64.c
Merge branch 'core/percpu' into percpu-cpumask-x86-for-linus-2
2009-03-27 17:28:43 +01:00
efi_stub_32.S
Merge branch 'x86/asm' into x86/mm
2009-02-25 08:27:46 +01:00
efi_stub_64.S
x86: efi_stub_32,64 - add missing ENDPROCs
2009-02-24 18:08:40 +01:00
efi.c
Merge branch 'core/percpu' into percpu-cpumask-x86-for-linus-2
2009-03-27 17:28:43 +01:00
entry_32.S
x86: entry_32.S fix compile warnings - fix work mask bit width
2009-03-14 09:42:51 +01:00
entry_64.S
Merge branch 'linus' into perfcounters/core
2009-04-29 14:47:05 +02:00
ftrace.c
tracing/syscalls: use a dedicated file header
2009-04-09 05:43:32 +02:00
geode_32.c
…
head32.c
x86-32: use brk segment for allocating initial kernel pagetable
2009-03-14 17:23:47 -07:00
head64.c
x86: add brk allocation for very, very early allocations
2009-03-14 15:37:14 -07:00
head_32.S
x86-32: tighten the bound on additional memory to map
2009-03-17 11:52:10 -07:00
head_64.S
x86: head_64.S - use IDT_ENTRIES instead of hardcoded number
2009-02-24 18:08:38 +01:00
head.c
x86, debug: remove EBDA debug printk
2008-12-12 11:08:42 +01:00
hpet.c
x86: hpet: fix periodic mode programming on AMD 81xx
2009-04-22 15:53:40 +02:00
i386_ksyms_32.c
ftrace: rename FTRACE to FUNCTION_TRACER
2008-10-20 18:27:03 +02:00
i387.c
x86, math-emu: fix init_fpu for task != current
2009-03-04 20:33:16 +01:00
i8237.c
i8327: fix outb() parameter order
2009-02-10 13:13:23 +01:00
i8253.c
clocksource: pass clocksource to read() callback
2009-04-21 13:41:47 -07:00
i8259.c
x86: refactor x86_quirks support
2009-02-23 00:08:11 +01:00
init_task.c
take init_fs to saner place
2008-12-31 18:07:42 -05:00
io_delay.c
x86: io_delay.c cleanup
2009-03-21 16:57:04 +05:30
ioport.c
x86-32: use non-lazy io bitmap context switching
2009-03-02 12:07:48 +01:00
irq_32.c
Merge branch 'tj-percpu' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc into core/percpu
2009-02-24 21:52:45 +01:00
irq_64.c
x86: unify do_IRQ()
2009-02-09 12:16:05 +01:00
irq.c
Merge branch 'linus' into perfcounters/core
2009-04-29 14:47:05 +02:00
irqinit_32.c
perf_counter: x86: self-IPI for pending work
2009-04-07 10:48:56 +02:00
irqinit_64.c
perf_counter: x86: self-IPI for pending work
2009-04-07 10:48:56 +02:00
k8.c
x86, gart: fix gart detection for Fam11h CPUs
2008-10-28 17:10:27 +01:00
kdebugfs.c
x86: kdebugfs.c cleanup
2009-03-21 16:55:45 +05:30
kgdb.c
x86, apic: remove genapic.h
2009-02-17 17:52:44 +01:00
kprobes.c
Merge branch 'tracing/core-v2' into tracing-for-linus
2009-04-02 00:49:02 +02:00
kvm.c
x86: with the last user gone, remove set_pte_present
2009-03-19 14:04:19 +01:00
kvmclock.c
clocksource: pass clocksource to read() callback
2009-04-21 13:41:47 -07:00
ldt.c
x86: ldt.c fix style problems
2009-01-02 17:46:24 +01:00
machine_kexec_32.c
x86, kexec: fix kexec x86 coding style
2009-03-10 18:13:25 -07:00
machine_kexec_64.c
x86, kexec: x86_64: add kexec jump support for x86_64
2009-03-10 18:13:25 -07:00
Makefile
Merge branch 'tracing/core-v2' into tracing-for-linus
2009-04-02 00:49:02 +02:00
mca_32.c
x86: refactor x86_quirks support
2009-02-23 00:08:11 +01:00
mfgpt_32.c
cpumask: remove references to struct irqaction's mask field.
2009-03-30 22:05:14 +10:30
microcode_amd.c
x86: microcode: cleanup
2009-03-18 13:51:17 +01:00
microcode_core.c
Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-04-17 09:56:11 -07:00
microcode_intel.c
x86: microcode: cleanup
2009-03-18 13:51:17 +01:00
mmconf-fam10h_64.c
x86: move various CPU initialization objects into .cpuinit.rodata
2009-03-12 13:13:07 +01:00
module_32.c
x86: module_32.c fix style problems
2009-01-12 11:22:55 +01:00
module_64.c
x86: module_64.c fix style problems
2009-01-12 11:23:01 +01:00
mpparse.c
x86: Fix section mismatches in mpparse
2009-04-12 12:32:18 +02:00
msr.c
x86: msr.c fix style problems
2009-01-12 11:22:50 +01:00
olpc.c
x86, olpc: fix model detection without OFW
2009-02-14 23:05:25 +01:00
paravirt_patch_32.c
x86/pvops: add a paravirt_ident functions to allow special patching
2009-01-30 14:51:44 -08:00
paravirt_patch_64.c
x86/pvops: add a paravirt_ident functions to allow special patching
2009-01-30 14:51:44 -08:00
paravirt-spinlocks.c
x86: remove byte locks
2009-01-20 17:14:28 +01:00
paravirt.c
x86: with the last user gone, remove set_pte_present
2009-03-19 14:04:19 +01:00
pci-calgary_64.c
x86, ia64: convert to use generic dma_map_ops struct
2009-01-06 14:06:57 +01:00
pci-dma.c
dma-mapping: replace all DMA_24BIT_MASK macro with DMA_BIT_MASK(24)
2009-04-07 08:31:12 -07:00
pci-gart_64.c
Merge branch 'linus' into core/iommu
2009-03-05 12:47:28 +01:00
pci-nommu.c
dma-mapping: replace all DMA_32BIT_MASK macro with DMA_BIT_MASK(32)
2009-04-07 08:31:11 -07:00
pci-swiotlb.c
x86: pci-swiotlb.c swiotlb_dma_ops should be static
2009-04-14 02:51:04 +02:00
pcspeaker.c
…
pmtimer_64.c
…
probe_roms_32.c
x86: move mach-default/*.h files to asm/
2009-01-29 14:16:51 +01:00
process_32.c
Simplify copy_thread()
2009-04-02 19:04:51 -07:00
process_64.c
Simplify copy_thread()
2009-04-02 19:04:51 -07:00
process.c
Merge branch 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-04-05 11:04:19 -07:00
ptrace.c
tracing/syscalls: use a dedicated file header
2009-04-09 05:43:32 +02:00
pvclock.c
x86: pvclock: fix shadowed variable warning
2008-10-15 14:25:14 +02:00
quirks.c
x86, hpet: Stop soliciting hpet=force users on ICH4M
2009-04-24 08:41:39 +02:00
reboot_fixups_32.c
…
reboot.c
x86: DMI match for the Dell DXP061 as it needs BIOS reboot
2009-04-08 17:53:27 +02:00
relocate_kernel_32.S
x86, kexec: fix kexec x86 coding style
2009-03-10 18:13:25 -07:00
relocate_kernel_64.S
x86, kexec: x86_64: add kexec jump support for x86_64
2009-03-10 18:13:25 -07:00
rtc.c
x86: rtc.c cleanup
2009-03-21 16:56:37 +05:30
scx200_32.c
…
setup_percpu.c
x86: remove duplicated code with pcpu_need_numa()
2009-04-02 06:08:05 +02:00
setup.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask
2009-03-30 18:00:26 -07:00
signal.c
perf_counter: unify and fix delayed counter wakeup
2009-04-06 09:30:36 +02:00
smp.c
x86, apic: remove genapic.h
2009-02-17 17:52:44 +01:00
smpboot.c
cpumask: use new cpumask functions throughout x86
2009-03-13 14:49:54 +10:30
stacktrace.c
x86: update copyrights
2009-01-31 04:21:18 +01:00
step.c
…
sys_i386_32.c
…
sys_x86_64.c
…
syscall_64.c
x86: Fix ASM_X86__ header guards
2008-10-22 22:55:23 -07:00
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
x86: refactor x86_quirks support
2009-02-23 00:08:11 +01:00
time_64.c
cpumask: remove references to struct irqaction's mask field.
2009-03-30 22:05:14 +10:30
tlb_uv.c
Merge branch 'x86/uv' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2009-04-16 16:43:20 -07:00
tls.c
…
tls.h
…
topology.c
x86: topology.c cleanup
2009-03-21 16:55:24 +05:30
trampoline_32.S
x86: use _types.h headers in asm where available
2009-02-13 11:35:01 -08:00
trampoline_64.S
x86: use _types.h headers in asm where available
2009-02-13 11:35:01 -08:00
trampoline.c
x86: change static allocation of trampoline area
2008-12-08 13:49:45 +01:00
traps.c
Merge branch 'linus' into perfcounters/core-v2
2009-04-06 09:02:57 +02:00
tsc_sync.c
Merge branches 'x86/apic', 'x86/cleanups', 'x86/cpufeature', 'x86/crashdump', 'x86/debug', 'x86/defconfig', 'x86/detect-hyper', 'x86/doc', 'x86/dumpstack', 'x86/early-printk', 'x86/fpu', 'x86/idle', 'x86/io', 'x86/memory-corruption-check', 'x86/microcode', 'x86/mm', 'x86/mtrr', 'x86/nmi-watchdog', 'x86/pat2', 'x86/pci-ioapic-boot-irq-quirks', 'x86/ptrace', 'x86/quirks', 'x86/reboot', 'x86/setup-memory', 'x86/signal', 'x86/sparse-fixes', 'x86/time', 'x86/uv' and 'x86/xen' into x86/core
2008-12-23 16:27:23 +01:00
tsc.c
clocksource: pass clocksource to read() callback
2009-04-21 13:41:47 -07:00
uv_irq.c
x86, apic: remove genapic.h
2009-02-17 17:52:44 +01:00
uv_sysfs.c
x86: prevent /sys/firmware/sgi_uv from being created on non-uv systems
2009-04-08 14:58:10 +02:00
uv_time.c
uv_time: add parameter to uv_read_rtc()
2009-04-22 17:41:25 +02:00
verify_cpu_64.S
…
visws_quirks.c
x86: convert obsolete irq_desc_t typedef to struct irq_desc
2009-03-11 09:49:01 +01:00
vm86_32.c
x86: use regparm(3) for passed-in pt_regs pointer
2009-02-11 14:00:56 -08:00
vmi_32.c
x86: with the last user gone, remove set_pte_present
2009-03-19 14:04:19 +01:00
vmiclock_32.c
clocksource: pass clocksource to read() callback
2009-04-21 13:41:47 -07:00
vmlinux_32.lds.S
x86-32: move _end to a dummy section
2009-03-17 14:16:02 -07:00
vmlinux_64.lds.S
x86/brk: put the brk reservations in their own section
2009-03-17 12:58:15 -07:00
vmlinux.lds.S
…
vsmp_64.c
Revert "x86: don't compile vsmp_64 for 32bit"
2009-03-25 21:34:28 +01:00
vsyscall_64.c
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
x8664_ksyms_64.c
x86: convert pda ops to wrappers around x86 percpu accessors
2009-01-16 14:20:22 +01:00
xsave.c
x86-64: fix FPU corruption with signals and preemption
2009-04-20 14:33:00 -07:00