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Date: Fri, 6 Jun 2008 12:02:07 -0500
From: Dean Nelson <dcn@....com>
To: akpm@...ux-foundation.org
Cc: linux-kernel@...r.kernel.org
Subject: [Patch 17/18] isolate remote copy buffer to sn2 only
Make the remote copy buffer an sn2 only item.
Signed-off-by: Dean Nelson <dcn@....com>
---
drivers/misc/sgi-xp/xp.h | 10 ---
drivers/misc/sgi-xp/xpc.h | 39 +++-----------
drivers/misc/sgi-xp/xpc_main.c | 31 ++---------
drivers/misc/sgi-xp/xpc_partition.c | 31 ++++-------
drivers/misc/sgi-xp/xpc_sn2.c | 88 +++++++++++++++++++++++++-------
5 files changed, 97 insertions(+), 102 deletions(-)
Index: linux-2.6/drivers/misc/sgi-xp/xpc.h
===================================================================
--- linux-2.6.orig/drivers/misc/sgi-xp/xpc.h 2008-06-06 08:04:49.741302190 -0500
+++ linux-2.6/drivers/misc/sgi-xp/xpc.h 2008-06-06 08:04:57.942317909 -0500
@@ -151,26 +151,6 @@ struct xpc_vars_sn2 {
#define XPC_V_VERSION _XPC_VERSION(3, 1) /* version 3.1 of the cross vars */
/*
- * The following pertains to ia64-sn2 only.
- *
- * Memory for XPC's amo variables is allocated by the MSPEC driver. These
- * pages are located in the lowest granule. The lowest granule uses 4k pages
- * for cached references and an alternate TLB handler to never provide a
- * cacheable mapping for the entire region. This will prevent speculative
- * reading of cached copies of our lines from being issued which will cause
- * a PI FSB Protocol error to be generated by the SHUB. For XPC, we need 64
- * amo variables (based on XP_MAX_NPARTITIONS_SN2) to identify the senders of
- * NOTIFY IRQs, 128 amo variables (based on XP_NASID_MASK_WORDS) to identify
- * the senders of ACTIVATE IRQs, 1 amo variable to identify which remote
- * partitions (i.e., XPCs) consider themselves currently engaged with the
- * local XPC and 1 amo variable to request partition deactivation.
- */
-#define XPC_NOTIFY_IRQ_AMOS 0
-#define XPC_ACTIVATE_IRQ_AMOS (XPC_NOTIFY_IRQ_AMOS + XP_MAX_NPARTITIONS_SN2)
-#define XPC_ENGAGED_PARTITIONS_AMO (XPC_ACTIVATE_IRQ_AMOS + XP_NASID_MASK_WORDS)
-#define XPC_DEACTIVATE_REQUEST_AMO (XPC_ENGAGED_PARTITIONS_AMO + 1)
-
-/*
* The following structure describes the per partition specific variables.
*
* An array of these structures, one per partition, will be defined. As a
@@ -214,9 +194,10 @@ struct xpc_vars_part_sn2 {
#define XPC_RP_VARS_SIZE L1_CACHE_ALIGN(sizeof(struct xpc_vars_sn2))
#define XPC_RP_PART_NASIDS(_rp) ((u64 *)((u8 *)(_rp) + XPC_RP_HEADER_SIZE))
-#define XPC_RP_MACH_NASIDS(_rp) (XPC_RP_PART_NASIDS(_rp) + xp_nasid_mask_words)
-#define XPC_RP_VARS(_rp) ((struct xpc_vars_sn2 *)(XPC_RP_MACH_NASIDS(_rp) + \
- xp_nasid_mask_words))
+#define XPC_RP_MACH_NASIDS(_rp) (XPC_RP_PART_NASIDS(_rp) + xpc_nasid_mask_words)
+#define XPC_RP_VARS(_rp) ((struct xpc_vars_sn2 *) \
+ (XPC_RP_MACH_NASIDS(_rp) + \
+ xpc_nasid_mask_words))
/*
* Functions registered by add_timer() or called by kernel_thread() only
@@ -225,11 +206,11 @@ struct xpc_vars_part_sn2 {
* the passed argument.
*/
#define XPC_PACK_ARGS(_arg1, _arg2) \
- ((((u64) _arg1) & 0xffffffff) | \
- ((((u64) _arg2) & 0xffffffff) << 32))
+ ((((u64)_arg1) & 0xffffffff) | \
+ ((((u64)_arg2) & 0xffffffff) << 32))
-#define XPC_UNPACK_ARG1(_args) (((u64) _args) & 0xffffffff)
-#define XPC_UNPACK_ARG2(_args) ((((u64) _args) >> 32) & 0xffffffff)
+#define XPC_UNPACK_ARG1(_args) (((u64)_args) & 0xffffffff)
+#define XPC_UNPACK_ARG2(_args) ((((u64)_args) >> 32) & 0xffffffff)
/*
* Define a Get/Put value pair (pointers) used with a message queue.
@@ -710,12 +691,10 @@ extern void xpc_exit_uv(void);
/* found in xpc_partition.c */
extern int xpc_exiting;
-extern int xp_nasid_mask_words;
+extern int xpc_nasid_mask_words;
extern struct xpc_rsvd_page *xpc_rsvd_page;
extern u64 *xpc_mach_nasids;
extern struct xpc_partition *xpc_partitions;
-extern char *xpc_remote_copy_buffer;
-extern void *xpc_remote_copy_buffer_base;
extern void *xpc_kmalloc_cacheline_aligned(size_t, gfp_t, void **);
extern struct xpc_rsvd_page *xpc_setup_rsvd_page(void);
extern int xpc_identify_activate_IRQ_sender(void);
Index: linux-2.6/drivers/misc/sgi-xp/xpc_main.c
===================================================================
--- linux-2.6.orig/drivers/misc/sgi-xp/xpc_main.c 2008-06-06 08:04:49.773306154 -0500
+++ linux-2.6/drivers/misc/sgi-xp/xpc_main.c 2008-06-06 08:04:57.950318900 -0500
@@ -877,7 +877,6 @@ xpc_do_exit(enum xp_retval reason)
unregister_sysctl_table(xpc_sysctl);
kfree(xpc_partitions);
- kfree(xpc_remote_copy_buffer_base);
if (is_shub())
xpc_exit_sn2();
@@ -1031,7 +1030,9 @@ xpc_init(void)
short partid;
struct xpc_partition *part;
struct task_struct *kthread;
- size_t buf_size;
+
+ snprintf(xpc_part->bus_id, BUS_ID_SIZE, "part");
+ snprintf(xpc_chan->bus_id, BUS_ID_SIZE, "chan");
if (is_shub()) {
/*
@@ -1054,26 +1055,12 @@ xpc_init(void)
return -ENODEV;
}
- snprintf(xpc_part->bus_id, BUS_ID_SIZE, "part");
- snprintf(xpc_chan->bus_id, BUS_ID_SIZE, "chan");
-
- buf_size = max(XPC_RP_VARS_SIZE,
- XPC_RP_HEADER_SIZE + XP_NASID_MASK_BYTES);
- xpc_remote_copy_buffer = xpc_kmalloc_cacheline_aligned(buf_size,
- GFP_KERNEL,
- &xpc_remote_copy_buffer_base);
- if (xpc_remote_copy_buffer == NULL) {
- dev_err(xpc_part, "can't get memory for remote copy buffer\n");
- ret = -ENOMEM;
- goto out_1;
- }
-
xpc_partitions = kzalloc(sizeof(struct xpc_partition) *
xp_max_npartitions, GFP_KERNEL);
if (xpc_partitions == NULL) {
dev_err(xpc_part, "can't get memory for partition structure\n");
ret = -ENOMEM;
- goto out_2;
+ goto out_1;
}
/*
@@ -1115,7 +1102,7 @@ xpc_init(void)
if (xpc_rsvd_page == NULL) {
dev_err(xpc_part, "can't setup our reserved page\n");
ret = -EBUSY;
- goto out_3;
+ goto out_2;
}
/* add ourselves to the reboot_notifier_list */
@@ -1136,7 +1123,7 @@ xpc_init(void)
if (IS_ERR(kthread)) {
dev_err(xpc_part, "failed while forking hb check thread\n");
ret = -EBUSY;
- goto out_4;
+ goto out_3;
}
/*
@@ -1164,18 +1151,16 @@ xpc_init(void)
return 0;
/* initialization was not successful */
-out_4:
+out_3:
/* indicate to others that our reserved page is uninitialized */
xpc_rsvd_page->stamp = 0;
(void)unregister_die_notifier(&xpc_die_notifier);
(void)unregister_reboot_notifier(&xpc_reboot_notifier);
-out_3:
+out_2:
if (xpc_sysctl)
unregister_sysctl_table(xpc_sysctl);
kfree(xpc_partitions);
-out_2:
- kfree(xpc_remote_copy_buffer_base);
out_1:
if (is_shub())
xpc_exit_sn2();
Index: linux-2.6/drivers/misc/sgi-xp/xpc_partition.c
===================================================================
--- linux-2.6.orig/drivers/misc/sgi-xp/xpc_partition.c 2008-06-06 06:50:22.011329664 -0500
+++ linux-2.6/drivers/misc/sgi-xp/xpc_partition.c 2008-06-06 08:04:57.986323359 -0500
@@ -34,21 +34,12 @@ struct xpc_rsvd_page *xpc_rsvd_page;
static u64 *xpc_part_nasids;
u64 *xpc_mach_nasids;
-/* >>> next two variables should be 'xpc_' if they remain here */
-static int xp_sizeof_nasid_mask; /* actual size in bytes of nasid mask */
-int xp_nasid_mask_words; /* actual size in words of nasid mask */
+static int xpc_sizeof_nasid_mask; /* actual size in bytes of nasid mask */
+int xpc_nasid_mask_words; /* actual size in words of nasid mask */
struct xpc_partition *xpc_partitions;
/*
- * Generic buffer used to store a local copy of portions of a remote
- * partition's reserved page (either its header and part_nasids mask,
- * or its vars).
- */
-char *xpc_remote_copy_buffer;
-void *xpc_remote_copy_buffer_base;
-
-/*
* Guarantee that the kmalloc'd memory is cacheline aligned.
*/
void *
@@ -176,9 +167,9 @@ xpc_setup_rsvd_page(void)
/* SAL_version 1 didn't set the nasids_size field */
rp->SAL_nasids_size = 128;
}
- xp_sizeof_nasid_mask = rp->SAL_nasids_size;
- xp_nasid_mask_words = DIV_ROUND_UP(xp_sizeof_nasid_mask,
- BYTES_PER_WORD);
+ xpc_sizeof_nasid_mask = rp->SAL_nasids_size;
+ xpc_nasid_mask_words = DIV_ROUND_UP(xpc_sizeof_nasid_mask,
+ BYTES_PER_WORD);
/* setup the pointers to the various items in the reserved page */
xpc_part_nasids = XPC_RP_PART_NASIDS(rp);
@@ -222,14 +213,14 @@ xpc_get_remote_rp(int nasid, u64 *discov
/* pull over the reserved page header and part_nasids mask */
ret = xp_remote_memcpy(remote_rp, (void *)*remote_rp_pa,
- XPC_RP_HEADER_SIZE + xp_sizeof_nasid_mask);
+ XPC_RP_HEADER_SIZE + xpc_sizeof_nasid_mask);
if (ret != xpSuccess)
return ret;
if (discovered_nasids != NULL) {
u64 *remote_part_nasids = XPC_RP_PART_NASIDS(remote_rp);
- for (i = 0; i < xp_nasid_mask_words; i++)
+ for (i = 0; i < xpc_nasid_mask_words; i++)
discovered_nasids[i] |= remote_part_nasids[i];
}
@@ -414,12 +405,12 @@ xpc_discovery(void)
enum xp_retval ret;
remote_rp = xpc_kmalloc_cacheline_aligned(XPC_RP_HEADER_SIZE +
- xp_sizeof_nasid_mask,
+ xpc_sizeof_nasid_mask,
GFP_KERNEL, &remote_rp_base);
if (remote_rp == NULL)
return;
- discovered_nasids = kzalloc(sizeof(u64) * xp_nasid_mask_words,
+ discovered_nasids = kzalloc(sizeof(u64) * xpc_nasid_mask_words,
GFP_KERNEL);
if (discovered_nasids == NULL) {
kfree(remote_rp_base);
@@ -521,10 +512,10 @@ xpc_initiate_partid_to_nasids(short part
if (part->remote_rp_pa == 0)
return xpPartitionDown;
- memset(nasid_mask, 0, XP_NASID_MASK_BYTES);
+ memset(nasid_mask, 0, xpc_sizeof_nasid_mask);
part_nasid_pa = (u64)XPC_RP_PART_NASIDS(part->remote_rp_pa);
return xp_remote_memcpy(nasid_mask, (void *)part_nasid_pa,
- xp_sizeof_nasid_mask);
+ xpc_sizeof_nasid_mask);
}
Index: linux-2.6/drivers/misc/sgi-xp/xpc_sn2.c
===================================================================
--- linux-2.6.orig/drivers/misc/sgi-xp/xpc_sn2.c 2008-06-06 08:04:49.793308632 -0500
+++ linux-2.6/drivers/misc/sgi-xp/xpc_sn2.c 2008-06-06 08:04:57.994324350 -0500
@@ -19,6 +19,43 @@
#include <asm/sn/sn_sal.h>
#include "xpc.h"
+/*
+ * Define the number of u64s required to represent all the C-brick nasids
+ * as a bitmap. The cross-partition kernel modules deal only with
+ * C-brick nasids, thus the need for bitmaps which don't account for
+ * odd-numbered (non C-brick) nasids.
+ */
+#define XPC_MAX_PHYSNODES_SN2 (MAX_NUMALINK_NODES / 2)
+#define XP_NASID_MASK_BYTES_SN2 ((XPC_MAX_PHYSNODES_SN2 + 7) / 8)
+#define XP_NASID_MASK_WORDS_SN2 ((XPC_MAX_PHYSNODES_SN2 + 63) / 64)
+
+/*
+ * Memory for XPC's amo variables is allocated by the MSPEC driver. These
+ * pages are located in the lowest granule. The lowest granule uses 4k pages
+ * for cached references and an alternate TLB handler to never provide a
+ * cacheable mapping for the entire region. This will prevent speculative
+ * reading of cached copies of our lines from being issued which will cause
+ * a PI FSB Protocol error to be generated by the SHUB. For XPC, we need 64
+ * amo variables (based on XP_MAX_NPARTITIONS_SN2) to identify the senders of
+ * NOTIFY IRQs, 128 amo variables (based on XP_NASID_MASK_WORDS_SN2) to identify
+ * the senders of ACTIVATE IRQs, 1 amo variable to identify which remote
+ * partitions (i.e., XPCs) consider themselves currently engaged with the
+ * local XPC and 1 amo variable to request partition deactivation.
+ */
+#define XPC_NOTIFY_IRQ_AMOS_SN2 0
+#define XPC_ACTIVATE_IRQ_AMOS_SN2 (XPC_NOTIFY_IRQ_AMOS_SN2 + \
+ XP_MAX_NPARTITIONS_SN2)
+#define XPC_ENGAGED_PARTITIONS_AMO_SN2 (XPC_ACTIVATE_IRQ_AMOS_SN2 + \
+ XP_NASID_MASK_WORDS_SN2)
+#define XPC_DEACTIVATE_REQUEST_AMO_SN2 (XPC_ENGAGED_PARTITIONS_AMO_SN2 + 1)
+
+/*
+ * Buffer used to store a local copy of portions of a remote partition's
+ * reserved page (either its header and part_nasids mask, or its vars).
+ */
+static char *xpc_remote_copy_buffer_sn2;
+static void *xpc_remote_copy_buffer_base_sn2;
+
static struct xpc_vars_sn2 *xpc_vars; /* >>> Add _sn2 suffix? */
static struct xpc_vars_part_sn2 *xpc_vars_part; /* >>> Add _sn2 suffix? */
@@ -176,7 +213,7 @@ xpc_send_activate_IRQ_sn2(u64 amos_page_
int w_index = XPC_NASID_W_INDEX(from_nasid);
int b_index = XPC_NASID_B_INDEX(from_nasid);
struct amo *amos = (struct amo *)__va(amos_page_pa +
- (XPC_ACTIVATE_IRQ_AMOS *
+ (XPC_ACTIVATE_IRQ_AMOS_SN2 *
sizeof(struct amo)));
(void)xpc_send_IRQ_sn2(&amos[w_index], (1UL << b_index), to_nasid,
@@ -189,7 +226,7 @@ xpc_send_local_activate_IRQ_sn2(int from
int w_index = XPC_NASID_W_INDEX(from_nasid);
int b_index = XPC_NASID_B_INDEX(from_nasid);
struct amo *amos = (struct amo *)__va(xpc_vars->amos_page_pa +
- (XPC_ACTIVATE_IRQ_AMOS *
+ (XPC_ACTIVATE_IRQ_AMOS_SN2 *
sizeof(struct amo)));
/* fake the sending and receipt of an activate IRQ from remote nasid */
@@ -395,7 +432,7 @@ xpc_indicate_partition_engaged_sn2(struc
{
unsigned long irq_flags;
struct amo *amo = (struct amo *)__va(part->sn.sn2.remote_amos_page_pa +
- (XPC_ENGAGED_PARTITIONS_AMO *
+ (XPC_ENGAGED_PARTITIONS_AMO_SN2 *
sizeof(struct amo)));
local_irq_save(irq_flags);
@@ -422,7 +459,7 @@ xpc_indicate_partition_disengaged_sn2(st
struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
unsigned long irq_flags;
struct amo *amo = (struct amo *)__va(part_sn2->remote_amos_page_pa +
- (XPC_ENGAGED_PARTITIONS_AMO *
+ (XPC_ENGAGED_PARTITIONS_AMO_SN2 *
sizeof(struct amo)));
local_irq_save(irq_flags);
@@ -455,7 +492,7 @@ xpc_indicate_partition_disengaged_sn2(st
static int
xpc_partition_engaged_sn2(short partid)
{
- struct amo *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO;
+ struct amo *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO_SN2;
/* our partition's amo variable ANDed with partid mask */
return (FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) &
@@ -465,7 +502,7 @@ xpc_partition_engaged_sn2(short partid)
static int
xpc_any_partition_engaged_sn2(void)
{
- struct amo *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO;
+ struct amo *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO_SN2;
/* our partition's amo variable */
return FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) != 0;
@@ -474,7 +511,7 @@ xpc_any_partition_engaged_sn2(void)
static void
xpc_assume_partition_disengaged_sn2(short partid)
{
- struct amo *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO;
+ struct amo *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO_SN2;
/* clear bit(s) based on partid mask in our partition's amo */
FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
@@ -599,12 +636,12 @@ xpc_rsvd_page_init_sn2(struct xpc_rsvd_p
xp_max_npartitions);
/* initialize the activate IRQ related amo variables */
- for (i = 0; i < xp_nasid_mask_words; i++)
- (void)xpc_init_IRQ_amo_sn2(XPC_ACTIVATE_IRQ_AMOS + i);
+ for (i = 0; i < xpc_nasid_mask_words; i++)
+ (void)xpc_init_IRQ_amo_sn2(XPC_ACTIVATE_IRQ_AMOS_SN2 + i);
/* initialize the engaged remote partitions related amo variables */
- (void)xpc_init_IRQ_amo_sn2(XPC_ENGAGED_PARTITIONS_AMO);
- (void)xpc_init_IRQ_amo_sn2(XPC_DEACTIVATE_REQUEST_AMO);
+ (void)xpc_init_IRQ_amo_sn2(XPC_ENGAGED_PARTITIONS_AMO_SN2);
+ (void)xpc_init_IRQ_amo_sn2(XPC_DEACTIVATE_REQUEST_AMO_SN2);
return xpSuccess;
}
@@ -657,7 +694,7 @@ xpc_check_remote_hb_sn2(void)
short partid;
enum xp_retval ret;
- remote_vars = (struct xpc_vars_sn2 *)xpc_remote_copy_buffer;
+ remote_vars = (struct xpc_vars_sn2 *)xpc_remote_copy_buffer_sn2;
for (partid = 0; partid < xp_max_npartitions; partid++) {
@@ -749,7 +786,7 @@ xpc_request_partition_deactivation_sn2(s
struct xpc_partition_sn2 *part_sn2 = &part->sn.sn2;
unsigned long irq_flags;
struct amo *amo = (struct amo *)__va(part_sn2->remote_amos_page_pa +
- (XPC_DEACTIVATE_REQUEST_AMO *
+ (XPC_DEACTIVATE_REQUEST_AMO_SN2 *
sizeof(struct amo)));
local_irq_save(irq_flags);
@@ -784,7 +821,7 @@ xpc_cancel_partition_deactivation_reques
{
unsigned long irq_flags;
struct amo *amo = (struct amo *)__va(part->sn.sn2.remote_amos_page_pa +
- (XPC_DEACTIVATE_REQUEST_AMO *
+ (XPC_DEACTIVATE_REQUEST_AMO_SN2 *
sizeof(struct amo)));
local_irq_save(irq_flags);
@@ -808,7 +845,7 @@ xpc_cancel_partition_deactivation_reques
static int
xpc_partition_deactivation_requested_sn2(short partid)
{
- struct amo *amo = xpc_vars->amos_page + XPC_DEACTIVATE_REQUEST_AMO;
+ struct amo *amo = xpc_vars->amos_page + XPC_DEACTIVATE_REQUEST_AMO_SN2;
/* our partition's amo variable ANDed with partid mask */
return (FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) &
@@ -898,7 +935,7 @@ xpc_identify_activate_IRQ_req_sn2(int na
/* pull over the reserved page structure */
- remote_rp = (struct xpc_rsvd_page *)xpc_remote_copy_buffer;
+ remote_rp = (struct xpc_rsvd_page *)xpc_remote_copy_buffer_sn2;
ret = xpc_get_remote_rp(nasid, NULL, remote_rp, &remote_rp_pa);
if (ret != xpSuccess) {
@@ -917,7 +954,7 @@ xpc_identify_activate_IRQ_req_sn2(int na
/* pull over the cross partition variables */
- remote_vars = (struct xpc_vars_sn2 *)xpc_remote_copy_buffer;
+ remote_vars = (struct xpc_vars_sn2 *)xpc_remote_copy_buffer_sn2;
ret = xpc_get_remote_vars_sn2(remote_vars_pa, remote_vars);
if (ret != xpSuccess) {
@@ -996,10 +1033,10 @@ xpc_identify_activate_IRQ_sender_sn2(voi
int n_IRQs_detected = 0;
struct amo *act_amos;
- act_amos = xpc_vars->amos_page + XPC_ACTIVATE_IRQ_AMOS;
+ act_amos = xpc_vars->amos_page + XPC_ACTIVATE_IRQ_AMOS_SN2;
/* scan through act amo variable looking for non-zero entries */
- for (word = 0; word < xp_nasid_mask_words; word++) {
+ for (word = 0; word < xpc_nasid_mask_words; word++) {
if (xpc_exiting)
break;
@@ -2334,6 +2371,7 @@ int
xpc_init_sn2(void)
{
int ret;
+ size_t buf_size;
xpc_rsvd_page_init = xpc_rsvd_page_init_sn2;
xpc_increment_heartbeat = xpc_increment_heartbeat_sn2;
@@ -2378,6 +2416,16 @@ xpc_init_sn2(void)
xpc_send_msg = xpc_send_msg_sn2;
xpc_received_msg = xpc_received_msg_sn2;
+ buf_size = max(XPC_RP_VARS_SIZE,
+ XPC_RP_HEADER_SIZE + XP_NASID_MASK_BYTES_SN2);
+ xpc_remote_copy_buffer_sn2 = xpc_kmalloc_cacheline_aligned(buf_size,
+ GFP_KERNEL,
+ &xpc_remote_copy_buffer_base_sn2);
+ if (xpc_remote_copy_buffer_sn2 == NULL) {
+ dev_err(xpc_part, "can't get memory for remote copy buffer\n");
+ return -ENOMEM;
+ }
+
/* open up protections for IPI and [potentially] amo operations */
xpc_allow_IPI_ops_sn2();
xpc_allow_amo_ops_shub_wars_1_1_sn2();
@@ -2394,6 +2442,7 @@ xpc_init_sn2(void)
dev_err(xpc_part, "can't register ACTIVATE IRQ handler, "
"errno=%d\n", -ret);
xpc_disallow_IPI_ops_sn2();
+ kfree(xpc_remote_copy_buffer_base_sn2);
}
return ret;
}
@@ -2403,4 +2452,5 @@ xpc_exit_sn2(void)
{
free_irq(SGI_XPC_ACTIVATE, NULL);
xpc_disallow_IPI_ops_sn2();
+ kfree(xpc_remote_copy_buffer_base_sn2);
}
Index: linux-2.6/drivers/misc/sgi-xp/xp.h
===================================================================
--- linux-2.6.orig/drivers/misc/sgi-xp/xp.h 2008-06-05 19:46:55.103592966 -0500
+++ linux-2.6/drivers/misc/sgi-xp/xp.h 2008-06-06 08:04:58.014326827 -0500
@@ -61,16 +61,6 @@
#define XP_MAX_NPARTITIONS_UV 256
/*
- * Define the number of u64s required to represent all the C-brick nasids
- * as a bitmap. The cross-partition kernel modules deal only with
- * C-brick nasids, thus the need for bitmaps which don't account for
- * odd-numbered (non C-brick) nasids.
- */
-#define XP_MAX_PHYSNODE_ID (MAX_NUMALINK_NODES / 2)
-#define XP_NASID_MASK_BYTES ((XP_MAX_PHYSNODE_ID + 7) / 8)
-#define XP_NASID_MASK_WORDS ((XP_MAX_PHYSNODE_ID + 63) / 64)
-
-/*
* XPC establishes channel connections between the local partition and any
* other partition that is currently up. Over these channels, kernel-level
* `users' can communicate with their counterparts on the other partitions.
--
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