kevin/linux
1
Fork 0
Code
346b46be5f
linux/arch/x86/include/asm
History
Fernando Luis Vázquez Cao 346b46be5f x86: Add per-cpu stat counter for APIC ICR read tries 
In the IPI delivery slow path (NMI delivery) we retry the ICR
read to check for delivery completion a limited number of times.

[ The reason for the limited retries is that some of the places
  where it is used (cpu boot, kdump, etc) IPI delivery might not
  succeed (due to a firmware bug or system crash, for example)
  and in such a case it is better to give up and resume
  execution of other code. ]

This patch adds a new entry to /proc/interrupts, RTR, which
tells user space the number of times we retried the ICR read in
the IPI delivery slow path.

This should give some insight into how well the APIC
message delivery hardware is working - if the counts are way
too large then we are hitting a (very-) slow path way too
often.

Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp>
Cc: Jörn Engel <joern@logfs.org>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Link: http://lkml.kernel.org/n/tip-vzsp20lo2xdzh5f70g0eis2s@git.kernel.org
[ extended the changelog ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-14 09:32:05 +01:00
..
numachip x86: Add NumaChip support 2011-12-05 17:17:24 +01:00
uv Merge branch 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2011-10-28 05:43:56 -07:00
visws
xen Merge branch 'upstream/xen-settime' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen 2011-11-06 20:15:05 -08:00
a.out-core.h
a.out.h
acpi.h Merge branch 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6 2011-05-29 11:18:09 -07:00
aes.h
agp.h
alternative-asm.h asm alternatives: remove incorrect alignment notes 2011-09-15 13:28:33 -07:00
alternative.h asm alternatives: remove incorrect alignment notes 2011-09-15 13:28:33 -07:00
amd_nb.h x86: cache_info: Kill the atomic allocation in amd_init_l3_cache() 2011-09-12 19:28:37 +02:00
apb_timer.h Merge branch 'timers-clocksource-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-07-23 10:34:47 -07:00
apic_flat_64.h x86: Make flat_init_apic_ldr() available 2011-12-05 17:17:07 +01:00
apic.h x86: Add per-cpu stat counter for APIC ICR read tries 2011-12-14 09:32:05 +01:00
apicdef.h x86: TSC deadline definitions 2011-09-25 19:53:00 +03:00
apm.h
arch_hweight.h
archrandom.h x86, random: Verify RDRAND functionality and allow it to be disabled 2011-07-31 14:02:19 -07:00
asm-offsets.h
asm.h x86: Fix write lock scalability 64-bit issue 2011-07-21 09:03:36 +02:00
atomic64_32.h atomic: move atomic_add_unless to generic code 2011-07-26 16:49:47 -07:00
atomic64_64.h x86: Use xadd helper more widely 2011-08-29 13:44:12 -07:00
atomic.h x86: Use xadd helper more widely 2011-08-29 13:44:12 -07:00
auxvec.h
bios_ebda.h x86: Better comments for get_bios_ebda() 2011-04-29 14:13:15 -07:00
bitops.h asm-generic: add another generic ext2 atomic bitops 2011-07-26 16:49:46 -07:00
bitsperlong.h
boot.h x86: support XZ-compressed kernel 2011-01-13 08:03:25 -08:00
bootparam.h x86: Add device tree support 2011-02-23 22:27:52 +01:00
bug.h
bugs.h
byteorder.h
cache.h
cacheflush.h x86: Fix common misspellings 2011-03-18 10:39:30 +01:00
calgary.h x86, iommu: Make all IOMMU's detection routines return a value. 2010-08-26 15:13:13 -07:00
calling.h x86, asm: Flip RESTORE_ARGS arguments logic 2011-06-03 14:38:53 -07:00
ce4100.h x86: ce4100: Set pci ops via callback instead of module init 2011-03-14 15:13:23 +01:00
checksum_32.h
checksum_64.h
checksum.h
clocksource.h clocksource: Change __ARCH_HAS_CLOCKSOURCE_DATA to a CONFIG option 2011-07-21 13:34:05 -07:00
cmpxchg_32.h x86, cmpxchg: Unify cmpxchg into cmpxchg.h 2011-08-29 13:42:10 -07:00
cmpxchg_64.h x86, cmpxchg: Unify cmpxchg into cmpxchg.h 2011-08-29 13:42:10 -07:00
cmpxchg.h x86, cmpxchg: Use __compiletime_error() to make usage messages a bit nicer 2011-08-29 17:20:40 -07:00
compat.h compat: sync compat_stats with statfs. 2011-10-28 14:58:53 +02:00
cpu.h x86: Fix mwait_usable section mismatch 2011-02-14 12:08:28 +01:00
cpufeature.h Merge git://github.com/herbertx/crypto 2011-11-01 09:24:41 -07:00
cpumask.h
cputime.h
current.h
debugreg.h x86: Use this_cpu_ops to optimize code 2010-12-30 12:20:28 +01:00
delay.h asm-generic: move archictures to common delay.h 2011-07-22 18:46:24 +02:00
desc_defs.h
desc.h x86-64: Add user_64bit_mode paravirt op 2011-08-04 16:13:49 -07:00
device.h iommu: Rename the DMAR and INTR_REMAP config options 2011-09-21 10:22:03 +02:00
div64.h
dma-mapping.h doc: fix broken references 2011-09-27 18:08:04 +02:00
dma.h x86, NUMA: Enable emulation on 32bit too 2011-05-02 17:24:48 +02:00
dmi.h
dwarf2.h x86-64: Fix CFI data for interrupt frames 2011-09-28 19:04:52 +02:00
e820.h x86: e820: Remove conditional early mapping in parse_e820_ext 2011-02-23 22:27:52 +01:00
edac.h
efi.h x86, efi: Consolidate EFI nx control 2011-05-09 12:14:29 -07:00
elf.h x86, amd: Avoid cache aliasing penalties on AMD family 15h 2011-08-05 12:26:44 -07:00
emergency-restart.h
entry_arch.h x86, mce: Replace MCE_SELF_VECTOR by irq_work 2011-06-16 12:10:08 +02:00
errno.h
fb.h
fcntl.h
fixmap.h x86-64: Give vvars their own page 2011-06-05 21:30:32 +02:00
floppy.h
frame.h x86: Unify rwlock assembly implementation 2011-07-21 09:03:31 +02:00
ftrace.h ftrace/x86: mcount offset calculation 2011-05-16 14:55:57 -04:00
futex.h futex: Sanitize futex ops argument types 2011-03-11 12:23:31 +01:00
gart.h x86, gart: Set DISTLBWALKPRB bit always 2011-04-18 09:26:48 -07:00
genapic.h
geode.h
gpio.h x86/gpio: Implement x86 gpio_to_irq convert function 2011-01-11 12:46:15 +01:00
hardirq.h irq_work: Add generic hardirq context callbacks 2010-10-18 19:58:50 +02:00
highmem.h mm: stack based kmap_atomic() 2010-10-26 16:52:08 -07:00
hpet.h x86: ioapic/hpet: Convert to new chip functions 2010-10-12 16:53:37 +02:00
hugetlb.h
hw_breakpoint.h x86: Fix instruction breakpoint encoding 2010-09-17 03:24:13 +02:00
hw_irq.h iommu: Rename the DMAR and INTR_REMAP config options 2011-09-21 10:22:03 +02:00
hypertransport.h
hyperv.h Staging: hv: vmbus: Retry vmbus_post_msg() before giving up 2011-08-25 15:23:19 -07:00
hypervisor.h xen: HVM X2APIC support 2011-01-07 10:03:50 -05:00
i387.h x86-32, fpu: Fix FPU exception handling on non-SSE systems 2011-04-06 16:53:01 -07:00
i8259.h x86: i8259: Convert to new irq_chip functions 2010-10-12 16:53:36 +02:00
ia32_unistd.h
ia32.h
idle.h x86 idle: clarify AMD erratum 400 workaround 2011-05-29 03:38:57 -04:00
inat_types.h
inat.h
init.h x86: Rename e820_table_* to pgt_buf_* 2011-02-24 14:52:18 +01:00
insn.h
inst.h
intel_scu_ipc.h x86, mrst: Some drivers need to known when an SCU is available 2011-10-24 14:09:15 +02:00
io_apic.h x86, ioapic: Consolidate gsi routing info into 'struct ioapic' 2011-05-20 13:41:01 +02:00
io.h x86: don't include xen/xen.h in <asm/io.h> unless XEN is enabled 2011-08-03 22:00:38 -10:00
ioctl.h
ioctls.h
iomap.h mm: stack based kmap_atomic() 2010-10-26 16:52:08 -07:00
iommu_table.h x86, iommu: Update header comments with appropriate naming 2010-10-08 13:11:21 -07:00
iommu.h
ipcbuf.h
ipi.h x86: Make default_send_IPI_mask_sequence/allbutself_logical() 32bit only 2011-01-28 14:54:05 +01:00
irq_controller.h x86: dtb: Add irq domain abstraction 2011-02-23 22:27:53 +01:00
irq_regs.h
irq_remapping.h iommu: Rename the DMAR and INTR_REMAP config options 2011-09-21 10:22:03 +02:00
irq_vectors.h x86/irq: Standardize on CONFIG_SPARSE_IRQ=y 2011-10-13 12:12:12 +02:00
irq.h x86: Add device tree support 2011-02-23 22:27:52 +01:00
irqflags.h tracing, x86/irq: Do not trace arch_local_{*,irq_*}() functions 2011-07-07 19:22:32 +02:00
ist.h
jump_label.h jump label: Add _ASM_ALIGN for x86 and x86_64 2011-04-04 13:42:51 -04:00
Kbuild archs: replace unifdef-y with header-y 2010-08-14 22:26:51 +02:00
kdebug.h ptrace: unify show_regs() prototype 2011-07-26 16:49:43 -07:00
kexec.h
kgdb.h kgdbts: unify/generalize gdb breakpoint adjustment 2011-05-26 17:12:36 -07:00
kmap_types.h
kmemcheck.h
kprobes.h
kvm_emulate.h KVM: x86 emulator: expand decode flags to 64 bits 2011-09-25 19:52:49 +03:00
kvm_host.h KVM: emulate lapic tsc deadline timer for guest 2011-10-05 15:34:56 +02:00
kvm_para.h KVM guest: KVM Steal time registration 2011-07-24 11:49:36 +03:00
kvm.h KVM: x86: XSAVE/XRSTOR live migration support 2010-08-01 10:46:37 +03:00
ldt.h
lguest_hcall.h lguest: update comments 2011-07-22 14:39:50 +09:30
lguest.h
linkage.h x86: Get rid of asmregparm 2011-05-24 14:33:35 +02:00
local64.h
local.h atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
mach_timer.h
mach_traps.h x86/mrst: Avoid reporting wrong nmi status 2011-11-10 16:21:01 +01:00
math_emu.h
mc146818rtc.h
mca_dma.h
mca.h
mce.h x86/mce: Make mce_chrdev_ops 'static const' 2011-11-08 16:17:11 +01:00
memblock.h x86, efi: Do not reserve boot services regions within reserved areas 2011-06-18 22:48:49 +02:00
microcode.h x86, microcode, AMD: Cleanup code a bit 2010-11-10 14:54:54 +01:00
mman.h
mmconfig.h
mmu_context.h atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
mmu.h x86: Reorder mm_context_t to remove x86_64 alignment padding and thus shrink mm_struct 2011-05-25 16:16:41 +02:00
mmx.h
mmzone_32.h x86, mm: s/PAGES_PER_ELEMENT/PAGES_PER_SECTION/ 2011-07-12 21:58:11 -07:00
mmzone_64.h Fix node_start/end_pfn() definition for mm/page_cgroup.c 2011-06-27 14:13:09 -07:00
mmzone.h
module.h x86, cpu: Move AMD Elan Kconfig under "Processor family" 2011-04-08 13:01:25 -07:00
mpspec_def.h x86: Fix APIC ID sizing bug on larger systems, clean up MAX_APICS confusion 2011-01-05 14:09:23 +01:00
mpspec.h x86: Unify cpu/apicid <-> NUMA node mapping between 32 and 64bit 2011-01-28 14:54:09 +01:00
mrst-vrtc.h x86: mrst: Add vrtc driver which serves as a wall clock device 2010-11-11 11:34:27 +01:00
mrst.h x86/mrst: Add support for Penwell clock calibration 2011-11-10 16:20:59 +01:00
msgbuf.h
mshyperv.h
msidef.h
msr-index.h x86: TSC deadline definitions 2011-09-25 19:53:00 +03:00
msr.h
mtrr.h
mutex_32.h
mutex_64.h
mutex.h
mwait.h x86, mwait: Move mwait constants to a common header file 2010-09-17 15:36:40 -07:00
nmi.h x86, nmi: Add in logic to handle multiple events and unknown NMIs 2011-10-10 06:57:01 +02:00
nops.h x86, cpu: Clean up and unify the NOP selection infrastructure 2011-04-18 16:40:21 -07:00
numa_32.h x86, NUMA: Move NUMA init logic from numa_64.c to numa.c 2011-05-02 14:18:53 +02:00
numa_64.h x86, NUMA: Move NUMA init logic from numa_64.c to numa.c 2011-05-02 14:18:53 +02:00
numa.h x86, NUMA: Make numa_init_array() static 2011-05-02 17:24:48 +02:00
numaq.h x86-32, NUMA: Update numaq to use new NUMA init protocol 2011-05-02 14:18:53 +02:00
olpc_ofw.h x86, olpc: Use device tree for platform identification 2011-03-15 14:17:23 -07:00
olpc.h x86, olpc-xo1-sci: Add GPE handler and ebook switch functionality 2011-07-06 14:44:38 -07:00
page_32_types.h
page_32.h
page_64_types.h
page_64.h
page_types.h x86-64, NUMA: Revert NUMA affine page table allocation 2011-03-04 10:26:36 +01:00
page.h x86: Document __phys_reloc_hide() usage in __pa_symbol() 2010-08-11 08:43:49 +02:00
param.h
paravirt_types.h Merge branch 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-tip 2011-08-12 20:46:24 -07:00
paravirt.h KVM guest: Add a pv_ops stub for steal time 2011-07-14 12:59:44 +03:00
parport.h
pat.h
pci_64.h
pci_x86.h x86: constify PCI raw ops structures 2011-10-14 09:05:28 -07:00
pci-direct.h
pci-functions.h
pci.h x86/PCI: Remove dma32_reserve_bootmem 2011-05-10 15:43:32 -07:00
percpu.h percpu: Fixup __this_cpu_xchg* operations 2011-07-12 13:47:16 +02:00
perf_event_p4.h x86, perf: P4 PMU - Fix typos in comments and style cleanup 2011-07-21 20:41:54 +02:00
perf_event.h perf, x86: Implement IBS initialization 2011-10-10 06:57:16 +02:00
pgalloc.h tree-wide: fix comment/printk typos 2010-11-01 15:38:34 -04:00
pgtable_32_types.h
pgtable_32.h mm: remove pte_*map_nested() 2010-10-26 16:52:08 -07:00
pgtable_64_types.h
pgtable_64.h thp: add x86 32bit support 2011-01-13 17:32:44 -08:00
pgtable_types.h x86-64: Map the HPET NX 2011-06-05 21:30:33 +02:00
pgtable-2level_types.h
pgtable-2level.h thp: add x86 32bit support 2011-01-13 17:32:44 -08:00
pgtable-3level_types.h
pgtable-3level.h x86: Flush TLB if PGD entry is changed in i386 PAE mode 2011-03-18 11:44:01 +01:00
pgtable.h thp: don't allow transparent hugepage support without PSE 2011-01-13 17:32:45 -08:00
poll.h
posix_types_32.h
posix_types_64.h
posix_types.h
prctl.h
probe_roms.h x86: Introduce pci_map_biosrom() 2011-03-15 15:34:15 -07:00
processor-cyrix.h
processor-flags.h KVM: Remove RDWRGSFS bit from CR4_RESERVED_BITS 2011-07-12 13:16:22 +03:00
processor.h x86, intel: Output microcode revision in /proc/cpuinfo 2011-10-14 13:16:35 +02:00
prom.h atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
proto.h
ptrace-abi.h x86: Fix common misspellings 2011-03-18 10:39:30 +01:00
ptrace.h x86-64: Add user_64bit_mode paravirt op 2011-08-04 16:13:49 -07:00
pvclock-abi.h
pvclock.h KVM: Fix instruction size issue in pvclock scaling 2011-08-30 14:42:30 +03:00
reboot_fixups.h
reboot.h x86, nmi: Wire up NMI handlers to new routines 2011-10-10 06:56:57 +02:00
required-features.h
resource.h
resume-trace.h
rio.h
rtc.h
rwlock.h x86: Fix write lock scalability 64-bit issue 2011-07-21 09:03:36 +02:00
rwsem.h x86: Use xadd helper more widely 2011-08-29 13:44:12 -07:00
scatterlist.h remove needless ISA_DMA_THRESHOLD 2010-08-07 18:15:50 +02:00
seccomp_32.h
seccomp_64.h
seccomp.h
sections.h
segment.h x86, asm: Fix binutils 2.16 issue with __USER32_CS 2011-06-03 14:39:14 -07:00
sembuf.h
serial.h
setup_arch.h
setup.h Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-05-19 18:08:06 -07:00
shmbuf.h
shmparam.h
sigcontext32.h
sigcontext.h
sigframe.h
siginfo.h
signal.h
smp.h Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2011-03-15 19:49:10 -07:00
smpboot_hooks.h x86: Serialize SMP bootup CMOS accesses on rtc_lock 2011-07-21 09:20:59 +02:00
socket.h
sockios.h
sparsemem.h
spinlock_types.h x86, ticketlock: Make __ticket_spin_trylock common 2011-08-29 13:46:34 -07:00
spinlock.h x86, ticketlock: remove obsolete comment 2011-09-27 23:37:20 -07:00
stackprotector.h
stacktrace.h x86: Remove warning and warning_symbol from struct stacktrace_ops 2011-05-12 15:31:28 +02:00
stat.h
statfs.h
string_32.h
string_64.h
string.h
suspend_32.h PM / Hibernate: Remove arch_prepare_suspend() 2011-05-24 23:35:55 +02:00
suspend_64.h PM / Hibernate: Remove arch_prepare_suspend() 2011-05-24 23:35:55 +02:00
suspend.h
svm.h KVM: SVM: copy instruction bytes from VMCB 2011-01-12 11:31:07 +02:00
swab.h
swiotlb.h x86, swiotlb: Simplify SWIOTLB pci_swiotlb_detect routine. 2010-08-26 15:13:29 -07:00
sync_bitops.h
sys_ia32.h Mark arguments to certain syscalls as being const 2010-08-13 16:53:13 -07:00
syscall.h
syscalls.h Make do_execve() take a const filename pointer 2010-08-17 18:07:43 -07:00
system.h xen/pm_idle: Make pm_idle be default_idle under Xen. 2011-12-03 10:49:58 -08:00
tce.h
termbits.h
termios.h
thread_info.h atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
time.h x86: i8253: Consolidate definitions of global_clock_event 2011-06-09 15:01:40 +02:00
timer.h x86, nmi_watchdog: Remove all stub function calls from old nmi_watchdog 2010-11-18 09:08:23 +01:00
timex.h
tlb.h
tlbflush.h x86-32, mm: Add an initial page table for core bootstrapping 2010-10-20 14:23:55 -07:00
topology.h x86, NUMA: Make 32bit use common NUMA init path 2011-05-02 17:24:48 +02:00
trampoline.h x86, trampoline: Use the unified trampoline setup for ACPI wakeup 2011-02-17 21:05:06 -08:00
traps.h x86-64: Rework vsyscall emulation and add vsyscall= parameter 2011-08-10 19:26:46 -05:00
tsc.h x86-64: Move vread_tsc and vread_hpet into the vDSO 2011-07-14 17:57:05 -07:00
types.h remove dma64_addr_t 2011-03-23 19:47:18 -07:00
uaccess_32.h sanitize <linux/prefetch.h> usage 2011-05-20 12:50:29 -07:00
uaccess_64.h sanitize <linux/prefetch.h> usage 2011-05-20 12:50:29 -07:00
uaccess.h x86, perf: Make copy_from_user_nmi() a library function 2011-07-21 20:41:57 +02:00
ucontext.h
unaligned.h
unistd_32.h Cross Memory Attach 2011-10-31 17:30:44 -07:00
unistd_64.h Cross Memory Attach 2011-10-31 17:30:44 -07:00
unistd.h
user32.h
user_32.h
user_64.h
user.h
vdso.h x86-64: Clean up vdso/kernel shared variables 2011-05-24 14:51:28 +02:00
vga.h
vgtod.h x86-64: Move vread_tsc and vread_hpet into the vDSO 2011-07-14 17:57:05 -07:00
virtext.h
vm86.h
vmx.h KVM: APIC: avoid instruction emulation for EOI writes 2011-09-25 19:52:17 +03:00
vsyscall.h x86-64: Rework vsyscall emulation and add vsyscall= parameter 2011-08-10 19:26:46 -05:00
vvar.h x86-64: Give vvars their own page 2011-06-05 21:30:32 +02:00
x2apic.h x86, x2apic: Move the common bits to x2apic.h 2011-05-20 13:41:11 +02:00
x86_init.h x86: Add x86_init platform override to fix up NUMA core numbering 2011-12-05 17:17:21 +01:00
xcr.h
xor_32.h
xor_64.h
xor.h
xsave.h Merge branch 'x86-xsave-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-08-06 16:25:13 -07:00