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linux/arch/powerpc/platforms/pseries
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Sebastien Dugue b906cfa397 powerpc/pseries: Fix cpu hotplug 
Currently, pseries_cpu_die() calls msleep() while polling RTAS for
the status of the dying cpu.

However, if the cpu that is going down also happens to be the one
doing the tick then we're hosed as the tick_do_timer_cpu 'baton' is
only passed later on in tick_shutdown() when _cpu_down() does the
CPU_DEAD notification.  Therefore jiffies won't be updated anymore.

This replaces that msleep() with a cpu_relax() to make sure we're not
going to schedule at that point.

With this patch my test box survives a 100k iterations hotplug stress
test on _all_ cpus, whereas without it, it quickly dies after ~50
iterations.

Signed-off-by: Sebastien Dugue <sebastien.dugue@bull.net>
Cc: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-12-23 15:13:27 +11:00
..
cmm.c powerpc: Add reboot notifier to Collaborative Memory Manager 2008-12-21 14:21:15 +11:00
eeh.c powerpc/eeh: Make EEH device add/remove more robust 2008-11-06 09:25:15 +11:00
eeh_cache.c [POWERPC] Add CONFIG_PPC_PSERIES_DEBUG to enable debugging for platforms/pseries 2008-04-24 21:08:12 +10:00
eeh_driver.c powerpc: Guard print_device_node_tree() with #if 0 2008-08-20 16:34:57 +10:00
eeh_event.c [POWERPC] Rename get_property to of_get_property: arch/powerpc 2007-04-13 03:55:19 +10:00
eeh_sysfs.c [POWERPC] Show EEH per-device false positives 2007-06-14 22:29:55 +10:00
firmware.c [POWERPC] pseries/firmware.c should include pseries/pseries.h 2008-05-14 22:32:00 +10:00
hotplug-cpu.c powerpc/pseries: Fix cpu hotplug 2008-12-23 15:13:27 +11:00
hotplug-memory.c powerpc/pseries: Validate PFN in pseries_remove_lmb() 2008-10-21 15:17:47 +11:00
hvCall.S [POWERPC] Bypass hcall stats until cpu features have run 2007-03-22 15:01:43 +11:00
hvCall_inst.c [PATCH] mark struct file_operations const 2 2007-02-12 09:48:44 -08:00
hvconsole.c [POWERPC] clean up pseries hcall interfaces 2006-08-01 16:19:15 +10:00
hvcserver.c
iommu.c powerpc: Use is_kdump_kernel() 2008-10-31 16:11:47 +11:00
Kconfig powerpc: Disable Collaborative Memory Manager for kdump 2008-12-21 14:21:15 +11:00
kexec.c powerpc/pseries: Call pseries_kexec_setup only on pseries 2008-06-30 22:30:57 +10:00
lpar.c powerpc: Remove unnecessary condition when sanity-checking WIMG bits 2008-07-15 12:24:59 +10:00
Makefile powerpc/pseries: Add collaborative memory manager 2008-07-25 15:44:42 +10:00
msi.c [POWERPC] Read back MSI message in rtas_setup_msi_irqs() so restore works 2007-11-08 14:15:29 +11:00
nvram.c [POWERPC] Add missing of_node_put in pseries/nvram.c 2008-06-16 15:00:32 +10:00
pci.c [POWERPC] Rename get_property to of_get_property: arch/powerpc 2007-04-13 03:55:19 +10:00
pci_dlpar.c powerpc/pci: Fix various pseries PCI hotplug issues 2008-11-06 09:31:52 +11:00
phyp_dump.c powerpc: Pass a valid token to rtas_call() in phyp-dump code 2008-12-21 14:21:15 +11:00
plpar_wrappers.h powerpc: Fix CMM page loaning on 64k page kernel with 4k hardware pages 2008-08-18 14:22:35 +10:00
power.c [POWERPC] Fix warning in pseries/power.c 2008-02-20 13:33:37 +11:00
pseries.h [POWERPC] Move prototype for find_udbg_vterm() into a header file 2008-04-17 10:00:59 +10:00
ras.c [POWERPC] Fix sparse warnings in arch/powerpc/platforms/pseries 2008-05-14 22:32:02 +10:00
reconfig.c powerpc: Check rc of notifier chain for memory remove 2008-09-15 11:07:52 -07:00
rtasd.c powerpc: Honor O_NONBLOCK flag when reading RTAS log 2008-10-07 14:26:21 +11:00
scanlog.c [POWERPC] Assign PDE->data before gluing PDE into /proc tree 2008-05-05 16:47:14 +10:00
setup.c Remove asm/a.out.h files for all architectures without a.out support. 2008-09-06 19:30:24 +01:00
smp.c powerpc: Use cpu_thread_in_core in smp_init for of_spin_map 2008-10-21 15:19:12 +11:00
xics.c powerpc/pseries: Check for GIQ indicator before calling set-indicator 2008-12-16 15:53:13 +11:00
xics.h powerpc/xics: Consolidate ipi message encode and decode 2008-10-13 16:24:16 +11:00