android_kernel_xiaomi_sm8350/include
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
..
acpi Pull osi-now into release branch 2007-06-02 01:02:09 -04:00
asm-alpha ALPHA: misc fixes 2007-06-01 08:18:29 -07:00
asm-arm Introduce fixed sys_sync_file_range2() syscall, implement on PowerPC and ARM 2007-06-28 11:38:30 -07:00
asm-arm26 [ARM] use __used attribute 2007-05-30 13:15:06 +01:00
asm-avr32 [AVR32] Define ARCH_KMALLOC_MINALIGN to L1_CACHE_BYTES 2007-06-14 18:30:50 +02:00
asm-blackfin Blackfin arch: remove zero-sized include/asm-blackfin/macros.h 2007-07-03 08:25:50 +08:00
asm-cris
asm-frv frv: fix fallout from "remove sched.h from mm.h" patch 2007-07-01 12:29:44 -07:00
asm-generic Rework ptep_set_access_flags and fix sun4c 2007-06-16 13:16:16 -07:00
asm-h8300 h8300 trival patches 2007-06-01 08:18:29 -07:00
asm-i386 i386: es7000 build breakage fix 2007-07-06 10:23:43 -07:00
asm-ia64 [IA64] Support multiple CPUs going through OS_MCA 2007-07-11 11:50:11 -07:00
asm-m32r
asm-m68k m68k: discontinuous memory support 2007-05-31 07:58:14 -07:00
asm-m68knommu
asm-mips [MIPS] Fix scheduling latency issue on 24K, 34K and 74K cores 2007-07-06 16:17:11 +01:00
asm-parisc [PARISC] Fix unwinder on 64-bit kernels 2007-06-21 17:46:21 -04:00
asm-powerpc [POWERPC] Uninline and export virq_to_hw() for the pasemi_mac driver 2007-07-02 13:29:21 +10:00
asm-ppc Rework ptep_set_access_flags and fix sun4c 2007-06-16 13:16:16 -07:00
asm-s390 [S390] Move psw_set_key. 2007-06-19 13:10:20 +02:00
asm-sh sh: Fix se73180 platform device registration. 2007-06-04 11:07:23 +09:00
asm-sh64
asm-sparc Rework ptep_set_access_flags and fix sun4c 2007-06-16 13:16:16 -07:00
asm-sparc64 [SPARC64]: Add linux/pagemap.h to asm/tlb.h 2007-06-28 21:25:31 -07:00
asm-um uml: add asm/paravirt.h 2007-06-24 08:59:11 -07:00
asm-v850
asm-x86_64 x86_64: Fix eventd/timerfd syscalls 2007-06-20 14:27:25 -07:00
asm-xtensa Xtensa: use asm-generic/fcntl.h 2007-05-31 20:18:25 -07:00
crypto
keys
linux [IA64] SN: Correct ROM resource length for BIOS copy 2007-07-09 13:37:18 -07:00
math-emu
media
mtd
net [SCTP] Flag a pmtu change request 2007-06-13 20:44:42 +00:00
pcmcia
rdma
rxrpc
scsi
sound [ALSA] version 1.0.14 2007-05-31 11:03:27 +02:00
video
Kbuild