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linux/arch/ia64/kernel
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Bryan Sutula 76e677e25d [IA64] Avoid kernel hang during CMC interrupt storm 
I've noticed a kernel hang during a storm of CMC interrupts, which was
tracked down to the continual execution of the interrupt handler.

There's code in the CMC handler that's supposed to disable CMC
interrupts and switch to polling mode when it sees a bunch of CMCs.
Because disabling CMCs across all CPUs isn't safe in interrupt context,
the disable is done with a schedule_work().  But with continual CMC
interrupts, the schedule_work() never gets executed.

The following patch immediately disables CMC interrupts for the current
CPU.  This then allows (at least) one CPU to ignore CMC interrupts,
execute the schedule_work() code, and disable CMC interrupts on the rest
of the CPUs.

Acked-by: Keith Owens <kaos@sgi.com>
Signed-off-by: Bryan Sutula <Bryan.Sutula@hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2005-10-06 15:04:11 -07:00
..
cpufreq [IA64] Add ACPI based P-state support 2005-08-26 15:09:24 -07:00
acpi-ext.c [ACPI] Lindent all ACPI files 2005-08-05 00:45:14 -04:00
acpi.c [IA64] Remove warnings for gcc 4.0 IA64 compilation. 2005-09-16 09:45:27 -07:00
asm-offsets.c [IA64] fix circular dependency on generation of asm-offsets.h 2005-09-13 08:50:39 -07:00
brl_emu.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
cyclone.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
efi_stub.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
efi.c [PATCH] ia64 uncached alloc 2005-06-21 18:46:18 -07:00
entry.h [IA64] Drop spurious paren in entry.h 2005-06-20 09:34:02 -07:00
entry.S [IA64] Remove warnings for gcc 4.0 IA64 compilation. 2005-09-16 09:45:27 -07:00
fsys.S kbuild: ia64 use generic asm-offsets.h support 2005-09-09 22:03:13 +02:00
gate-data.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
gate.lds.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
gate.S kbuild: ia64 use generic asm-offsets.h support 2005-09-09 22:03:13 +02:00
head.S kbuild: ia64 use generic asm-offsets.h support 2005-09-09 22:03:13 +02:00
ia64_ksyms.c [IA64] __ia64_syscall() is no longer used anywhere in the kernel. Remove it. 2005-04-27 21:10:45 -07:00
init_task.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
iosapic.c [IA64] Manual merge fix for 3 files 2005-09-08 14:27:13 -07:00
irq_ia64.c [IA64] assign_irq_vector() should not panic 2005-07-11 10:30:07 -07:00
irq_lsapic.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
irq.c [PATCH] x86/x86_64: deferred handling of writes to /proc/irqxx/smp_affinity 2005-09-07 16:57:15 -07:00
ivt.S [IA64] MCA/INIT: remove the physical mode path from minstate.h 2005-09-11 14:09:12 -07:00
jprobes.S [PATCH] Kprobes: prevent possible race conditions ia64 changes 2005-09-07 16:58:00 -07:00
kprobes.c [PATCH] kprobes: fix bug when probed on task and isr functions 2005-09-07 16:58:01 -07:00
machvec.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
Makefile [PATCH] cpusets: Move the ia64 domain setup code to the generic code 2005-09-07 16:57:40 -07:00
mca_asm.S [IA64] Wire in the MCA/INIT handler stacks 2005-09-22 13:24:19 -07:00
mca_drv_asm.S [IA64] mca_drv cleanup 2005-09-16 10:39:40 -07:00
mca_drv.c [IA64] MCA recovery verify pfn_valid 2005-09-22 13:27:59 -07:00
mca_drv.h [IA64] mca_drv cleanup 2005-09-16 10:39:40 -07:00
mca.c [IA64] Avoid kernel hang during CMC interrupt storm 2005-10-06 15:04:11 -07:00
minstate.h [IA64] MCA/INIT: remove the physical mode path from minstate.h 2005-09-11 14:09:12 -07:00
module.c [IA64] Module gp must point to valid memory 2005-06-08 11:41:31 -07:00
numa.c [IA64] fix generic/up builds 2005-07-06 18:18:10 -07:00
pal.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
palinfo.c [IA64] Allow /proc/pal/cpu0/vm_info under the simulator 2005-08-31 08:34:51 -07:00
patch.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
perfmon_default_smpl.c [IA64] perfmon: make pfm_sysctl a global, and other cleanup 2005-04-25 13:08:30 -07:00
perfmon_generic.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
perfmon_itanium.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
perfmon_mckinley.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
perfmon.c [PATCH] files: fix preemption issues 2005-09-17 11:50:02 -07:00
process.c [IA64] fix nohalt boot option 2005-08-08 15:39:47 -07:00
ptrace.c Auto merge with /home/aegl/GIT/ia64-test 2005-06-28 08:24:49 -07:00
sal.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
salinfo.c [IA64] MCA/INIT: avoid reading INIT record during INIT event 2005-09-11 14:02:43 -07:00
semaphore.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
setup.c [ACPI] delete CONFIG_ACPI_BOOT 2005-08-24 12:08:54 -04:00
sigframe.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
signal.c [PATCH] convert signal handling of NODEFER to act like other Unix boxes. 2005-08-29 10:03:11 -07:00
smp.c [IA64] Fix another IA64 preemption problem 2005-06-28 10:01:19 -07:00
smpboot.c [IA64] fix generic/up builds 2005-07-06 18:18:10 -07:00
sys_ia64.c [IA64] Rationalise Region Definitions 2005-08-24 15:35:41 -07:00
time.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
topology.c [ACPI] delete CONFIG_ACPI_BOOT 2005-08-24 12:08:54 -04:00
traps.c [PATCH] Kprobes: prevent possible race conditions ia64 changes 2005-09-07 16:58:00 -07:00
unaligned.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
uncached.c [IA64] uncached allocator: use generic (not sn2 specific) functions 2005-08-31 14:18:04 -07:00
unwind_decoder.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
unwind_i.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
unwind.c [IA64] MCA/INIT: remove obsolete unwind code 2005-09-11 14:09:34 -07:00
vmlinux.lds.S [PATCH] Kprobes: prevent possible race conditions ia64 changes 2005-09-07 16:58:00 -07:00