The patch titled
sgi-xpc: XPC fails to discover partitions with all nasids above 128
has been added to the -mm tree. Its filename is
xpc-fails-to-discover-partitions-with-all-nasids-above-128.patch
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------------------------------------------------------
Subject: sgi-xpc: XPC fails to discover partitions with all nasids above 128
From: Robin Holt <holt@xxxxxxx>
UV hardware defines 256 memory protection regions versus the baseline 64
with increasing size for the SN2 ia64. This was overlooked when XPC was
modified to accomodate both UV and SN2.
Without this patch, a user could reconfigure their existing system and
suddenly disable cross-partition communications with no indication of what
has gone wrong. It also prevents larger configurations from using
cross-partition communication.
Signed-off-by: Robin Holt <holt@xxxxxxx>
Cc: <stable@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/misc/sgi-xp/xpc_partition.c | 25 +++++++++++++++----------
1 file changed, 15 insertions(+), 10 deletions(-)
diff -puN drivers/misc/sgi-xp/xpc_partition.c~xpc-fails-to-discover-partitions-with-all-nasids-above-128 drivers/misc/sgi-xp/xpc_partition.c
--- a/drivers/misc/sgi-xp/xpc_partition.c~xpc-fails-to-discover-partitions-with-all-nasids-above-128
+++ a/drivers/misc/sgi-xp/xpc_partition.c
@@ -439,18 +439,23 @@ xpc_discovery(void)
* nodes that can comprise an access protection grouping. The access
* protection is in regards to memory, IOI and IPI.
*/
- max_regions = 64;
region_size = xp_region_size;
- switch (region_size) {
- case 128:
- max_regions *= 2;
- case 64:
- max_regions *= 2;
- case 32:
- max_regions *= 2;
- region_size = 16;
- DBUG_ON(!is_shub2());
+ if (is_uv())
+ max_regions = 256;
+ else {
+ max_regions = 64;
+
+ switch (region_size) {
+ case 128:
+ max_regions *= 2;
+ case 64:
+ max_regions *= 2;
+ case 32:
+ max_regions *= 2;
+ region_size = 16;
+ DBUG_ON(!is_shub2());
+ }
}
for (region = 0; region < max_regions; region++) {
_
Patches currently in -mm which might be from holt@xxxxxxx are
xpc-fails-to-discover-partitions-with-all-nasids-above-128.patch
sgi-xpc-xpc-fails-to-discover-partitions-with-all-nasids-above-128.patch
epoll-convert-max_user_watches-to-long.patch
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