kernel-fxtec-pro1x/arch/ia64/kernel
Russ Anderson 1612b18ccb [IA64] Support multiple CPUs going through OS_MCA
Linux does not gracefully deal with multiple processors going
through OS_MCA aa part of the same MCA event.  The first cpu
into OS_MCA grabs the ia64_mca_serialize lock.  Subsequent
cpus wait for that lock, preventing them from reporting in as
rendezvoused.  The first cpu waits 5 seconds then complains
that all the cpus have not rendezvoused.  The first cpu then
handles its MCA and frees up all the rendezvoused cpus and
releases the ia64_mca_serialize lock.  One of the subsequent
cpus going thought OS_MCA then gets the ia64_mca_serialize
lock, waits another 5 seconds and then complains that none of
the other cpus have rendezvoused.

This patch allows multiple CPUs to gracefully go through OS_MCA.

The first CPU into ia64_mca_handler() grabs a mca_count lock.
Subsequent CPUs into ia64_mca_handler() are added to a list of cpus
that need to go through OS_MCA (a bit set in mca_cpu), and report
in as rendezvoused, and but spin waiting their turn.

The first CPU sees everyone rendezvous, handles his MCA, wakes up
one of the other CPUs waiting to process their MCA (by clearing
one mca_cpu bit), and then waits for the other cpus to complete
their MCA handling.  The next CPU handles his MCA and the process
repeats until all the CPUs have handled their MCA.  When the last
CPU has handled it's MCA, it sets monarch_cpu to -1, releasing all
the CPUs.

In testing this works more reliably and faster.

Thanks to Keith Owens for suggesting numerous improvements
to this code.

Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2007-07-11 11:50:11 -07:00
..
cpufreq ACPI: replace kmalloc+memset with kzalloc 2006-12-20 16:54:54 -05:00
acpi-ext.c Pull acpi_os_free into release branch 2006-07-01 17:19:08 -04:00
acpi-processor.c [IA64] Fix using uninitialized data in _PDC setup 2007-05-24 10:14:30 -07:00
acpi.c [IA64] acpi_get_sysname() should be __init 2007-05-24 10:59:44 -07:00
asm-offsets.c [IA64] fsys_getcpu for IA64 2007-03-07 16:27:09 -08:00
audit.c [PATCH] audit signal recipients 2007-05-11 05:38:25 -04:00
brl_emu.c
crash.c [IA64] kdump on INIT needs multi-nodes sync-up (v.2) 2007-05-14 15:55:39 -07:00
crash_dump.c [IA64] kexec: Minor enhancement to includes in crash.c 2007-02-05 11:31:04 -08:00
cyclone.c [IA64] don't report !sn2 or !summit hardware as an error 2006-03-07 15:26:49 -08:00
efi.c EFI: warn only for pre-1.00 system tables 2007-05-08 11:15:10 -07:00
efi_stub.S [IA64] make efi_stub.S fit in 80 cols 2006-06-21 14:35:28 -07:00
entry.h Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
entry.S [IA64] wire up {signal,timer,event}fd syscalls 2007-05-14 15:55:11 -07:00
err_inject.c [IA64] typo s/kenrel/kernel/ 2007-05-10 09:35:30 -07:00
esi.c [IA64] esi-support 2006-06-21 11:19:22 -07:00
esi_stub.S [IA64] esi-support 2006-06-21 11:19:22 -07:00
fsys.S [IA64] fsys_getcpu for IA64 2007-03-07 16:27:09 -08:00
gate-data.S
gate.lds.S [PATCH] vDSO hash-style fix 2006-07-31 13:28:43 -07:00
gate.S [IA64] Stop bit for brl instruction 2007-07-09 13:37:44 -07:00
head.S [IA64] Save register stack contents on cpu start 2006-09-08 11:05:13 -07:00
ia64_ksyms.c [IA64] Need export for csum_ipv6_magic 2006-12-07 13:18:57 -08:00
init_task.c [PATCH] nsproxy: move init_nsproxy into kernel/nsproxy.c 2006-10-02 07:57:20 -07:00
iosapic.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 2007-05-09 13:38:45 -07:00
irq.c [IA64] spelling fixes: arch/ia64/ 2007-05-11 14:55:43 -07:00
irq_ia64.c [IA64] sa_interrupt is deprecated 2007-05-09 14:20:59 -07:00
irq_lsapic.c [IA64] spelling fixes: arch/ia64/ 2007-05-11 14:55:43 -07:00
ivt.S [IA64] relax per-cpu TLB requirement to DTC 2007-02-06 15:04:48 -08:00
jprobes.S [IA64] enable trap code on slot 1 2006-12-12 12:00:55 -08:00
kprobes.c [IA64] optimize pagefaults a little 2007-05-16 09:00:51 -07:00
machine_kexec.c [IA64] Fix NULL-pointer dereference in ia64_machine_kexec() 2007-02-05 14:06:44 -08:00
machvec.c [IA64] Fix - Section mismatch: reference to .init.data:mvec_name 2007-05-10 11:57:58 -07:00
Makefile [IA64] Itanium MC Error Injection Tool: Makefile changes 2007-01-29 15:27:07 -08:00
mca.c [IA64] Support multiple CPUs going through OS_MCA 2007-07-11 11:50:11 -07:00
mca_asm.S [IA64] Support multiple CPUs going through OS_MCA 2007-07-11 11:50:11 -07:00
mca_drv.c [IA64] spelling fixes: arch/ia64/ 2007-05-11 14:55:43 -07:00
mca_drv.h [IA64] printing support for MCA/INIT 2006-09-26 14:44:37 -07:00
mca_drv_asm.S [IA64] Don't set psr.ic and psr.i simultaneously 2007-07-09 10:30:28 -07:00
minstate.h Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
module.c [IA64] spelling fixes: arch/ia64/ 2007-05-11 14:55:43 -07:00
msi_ia64.c [IA64] Fix wrong assumption about irq and vector in msi_ia64.c 2007-04-06 15:37:06 -07:00
numa.c [PATCH] cpumask: export node_to_cpu_mask consistently 2006-10-02 07:57:17 -07:00
pal.S [IA64] reformat pal.S to fit in 80 columns, fix typos 2006-10-17 14:54:19 -07:00
palinfo.c Add suspend-related notifications for CPU hotplug 2007-05-09 12:30:56 -07:00
patch.c [IA64] remove per-cpu ia64_phys_stacked_size_p8 2007-02-06 15:04:18 -08:00
perfmon.c [IA64] spelling fixes: arch/ia64/ 2007-05-11 14:55:43 -07:00
perfmon_default_smpl.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
perfmon_generic.h
perfmon_itanium.h
perfmon_mckinley.h [IA64] spelling fixes: arch/ia64/ 2007-05-11 14:55:43 -07:00
perfmon_montecito.h [IA64] sparse cleanups 2006-12-07 10:48:19 -08:00
process.c [IA64] silence GCC ia64 unused variable warnings 2007-07-11 11:40:42 -07:00
ptrace.c [IA64] add missing syscall trace clear 2007-03-08 10:27:24 -08:00
relocate_kernel.S [IA64] Removal of percpu TR cleanup in kexec code 2007-05-08 10:00:28 -07:00
sal.c [IA64] spelling fixes: arch/ia64/ 2007-05-11 14:55:43 -07:00
salinfo.c [IA64] spelling fixes: arch/ia64/ 2007-05-11 14:55:43 -07:00
semaphore.c
setup.c [IA64] spelling fixes: arch/ia64/ 2007-05-11 14:55:43 -07:00
sigframe.h [IA64] Add TIF_RESTORE_SIGMASK 2007-05-08 14:51:59 -07:00
signal.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 2007-05-09 13:38:45 -07:00
smp.c [IA64] spelling fixes: arch/ia64/ 2007-05-11 14:55:43 -07:00
smpboot.c [IA64] start_secondary() and smp_callin() should be __cpuinit 2007-05-23 16:46:40 -07:00
sys_ia64.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
time.c [IA64] remove duplicate header include line 2007-06-26 13:33:45 -07:00
topology.c Add suspend-related notifications for CPU hotplug 2007-05-09 12:30:56 -07:00
traps.c [IA64] spelling fixes: arch/ia64/ 2007-05-11 14:55:43 -07:00
unaligned.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
uncached.c [PATCH] Define easier to handle GFP_THISNODE 2006-09-26 08:48:50 -07:00
unwind.c [IA64] Correct unwind validation code 2007-06-26 13:33:10 -07:00
unwind_decoder.c
unwind_i.h
vmlinux.lds.S all-archs: consolidate .data section definition in asm-generic 2007-05-19 09:11:57 +02:00