kernel-fxtec-pro1x/arch
Russ Anderson e1b1eb011e [IA64] Fix race when multiple cpus go through MCA
Additional testing uncovered a situation where the MCA recovery code could
hang due to a race condition.

According to the SAL spec, SAL sends a rendezvous interrupt to all but the first
CPU that goes into MCA.  This includes other CPUs that go into MCA at the same
time.  Those other CPUs will go into the linux MCA handler (rather than the
slave loop) with the rendezvous interrupt pending.  When all the CPUs have
completed MCA processing and the last monarch completes, freeing all the CPUs,
the CPUs with the pended rendezvous interrupt then go into the
ia64_mca_rendez_int_handler().  In ia64_mca_rendez_int_handler() the CPUs
get marked as rendezvoused, but then leave the handler (due to no MCA).
That leaves the CPUs marked as rendezvoused _before_ the next MCA event.

When the next MCA hits, the monarch will mistakenly believe that all the CPUs
are rendezvoused when they are not, opening up a window where a CPU can get
stuck in the slave loop.

This patch avoids leaving CPUs marked as rendezvoused when they are not.

Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2007-10-12 15:19:02 -07:00
..
alpha alpha: -Werror fixes for sys_titan.c 2007-08-11 15:47:42 -07:00
arm Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-backlight 2007-10-11 19:19:50 -07:00
avr32 [AVR32] Fix random segfault with preemption 2007-10-11 13:32:56 +02:00
blackfin Blackfin arch: Remove cruft - CONFIG_DEBUG_SERIAL_EARLY_INIT and DEBUG_KERNEL_START 2007-10-10 22:26:33 +08:00
cris ide: fix hidden dependencies on CONFIG_IDE_GENERIC 2007-08-20 22:42:54 +02:00
frv FRV: connect up fallocate 2007-08-11 15:47:40 -07:00
h8300 H8/300: Fix misnamed "CONFIG_BLKDEV_RESERVE_ADDRESS" Kconfig variable 2007-09-11 17:21:20 -07:00
i386 x86: remove migration makefile tweaks 2007-10-11 11:20:06 +02:00
ia64 [IA64] Fix race when multiple cpus go through MCA 2007-10-12 15:19:02 -07:00
m32r m32r: Rename STI/CLI macros 2007-09-06 11:10:56 +09:00
m68k m68k(nommu): add missing syscalls 2007-09-11 17:21:20 -07:00
m68knommu m68k(nommu): add missing syscalls 2007-09-11 17:21:20 -07:00
mips Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2007-10-11 19:40:14 -07:00
parisc [PARISC] Add NOTES section 2007-08-27 00:29:25 -04:00
powerpc missed bio_endio() in axonram 2007-10-11 23:04:25 -07:00
ppc [POWERPC] Remove redundant reference to non-existent CONFIG_BOOTIMG 2007-10-09 21:02:00 +10:00
s390 [CRYPTO] sha: Add header file for SHA definitions 2007-10-10 16:55:50 -07:00
sh [SOFTIRQ]: Remove do_softirq() symbol export. 2007-10-10 16:48:36 -07:00
sh64 sh64: arch/sh64/kernel/setup.c: duplicate include removal. 2007-08-12 12:18:54 +09:00
sparc [SPARC]: Fix EBUS use of uninitialized variable. 2007-09-27 13:09:28 -07:00
sparc64 [NET]: Make the device list and device lookups per namespace. 2007-10-10 16:49:10 -07:00
um i386/x86_64: move headers to include/asm-x86 2007-10-11 11:20:03 +02:00
v850
x86 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2007-10-11 19:40:14 -07:00
x86_64 x86: remove migration makefile tweaks 2007-10-11 11:20:06 +02:00
xtensa xtensa process.c must #include <linux/fs.h> 2007-08-30 09:58:22 -07:00