linux/drivers/misc/sgi-xp
Dean Nelson 158bc69eff sgi-xp: eliminate false detection of no heartbeat
After XPC has been up and running on multiple partitions for any length of
time, if XPC on one of the partitions is stopped and restarted (either by
a rmmod/insmod or a system restart), it is possible for the XPCs running
on the other partitions to falsely detect a lack of heartbeat from the XPC
that was just restarted.  This false detection will occur if the restarted
XPC comes up within the five-seconds preceding one of the other XPC's
heartbeat check (which occurs once every twenty seconds).

The detection of no heartbeat results in the detecting XPC deactivating
from the just restarted XPC.  The only remedy is to restart one of the
XPCs and hope that one doesn't hit this five-second window on any of the
other partitions.

Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Robin Holt <holt@sgi.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-15 16:39:37 -08:00
..
Makefile sgi-xp: only build for ia64-sn2 when CONFIG_IA64_GENERIC specified 2008-10-30 11:38:46 -07:00
xp.h Merge branch 'linus' into x86/uv 2008-11-20 09:02:39 +01:00
xp_main.c SGI: struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-06 10:44:37 -08:00
xp_nofault.S [IA64] run some drivers/misc/sgi-xp through scripts/Lindent 2008-04-22 15:08:29 -07:00
xp_sn2.c sgi-xp: define xp_expand_memprotect() and xp_restrict_memprotect() 2008-11-05 20:32:20 -08:00
xp_uv.c sgi-xp: define xp_partition_id and xp_region_size 2008-11-05 20:32:21 -08:00
xpc.h sgi-xp: create activate and notify gru message queues 2008-11-05 20:32:20 -08:00
xpc_channel.c sgi-xp: setup the notify GRU message queue 2008-07-30 09:41:50 -07:00
xpc_main.c SGI: struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-06 10:44:37 -08:00
xpc_partition.c sgi-xp: setup the activate GRU message queue 2008-07-30 09:41:50 -07:00
xpc_sn2.c sgi-xp: eliminate false detection of no heartbeat 2009-01-15 16:39:37 -08:00
xpc_uv.c sgi-xp: xpc needs to pass the physical address, not virtual 2008-12-16 23:04:24 +01:00
xpnet.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2009-01-08 11:05:59 -08:00