[Patch 17/29] GRU - Add additional GRU statistics

From: steiner
Date: Tue Nov 24 2009 - 10:11:51 EST

From: Jack Steiner <steiner@xxxxxxx>

Add additional GRU statistics & debug messages.

Signed-off-by: Jack Steiner <steiner@xxxxxxx>

---
drivers/misc/sgi-gru/grufault.c | 18 +++++++++++-------
drivers/misc/sgi-gru/grufile.c | 2 +-
drivers/misc/sgi-gru/gruhandles.c | 11 ++++++++---
drivers/misc/sgi-gru/grukservices.c | 35 ++++++++++++++++++++++++-----------
drivers/misc/sgi-gru/grumain.c | 10 +++++++---
drivers/misc/sgi-gru/gruprocfs.c | 25 +++++++++++++------------
drivers/misc/sgi-gru/grutables.h | 18 +++++++++---------
drivers/misc/sgi-gru/grutlbpurge.c | 6 ++++--
8 files changed, 77 insertions(+), 48 deletions(-)

Index: linux/drivers/misc/sgi-gru/grufault.c
===================================================================
--- linux.orig/drivers/misc/sgi-gru/grufault.c 2009-11-20 09:32:34.000000000 -0600
+++ linux/drivers/misc/sgi-gru/grufault.c 2009-11-20 09:32:34.000000000 -0600
@@ -303,7 +303,7 @@ static int gru_try_dropin(struct gru_thr
struct gru_tlb_fault_handle *tfh,
struct gru_instruction_bits *cbk)
{
- int pageshift = 0, asid, write, ret, atomic = !cbk;
+ int pageshift = 0, asid, write, ret, atomic = !cbk, indexway;
unsigned long gpa = 0, vaddr = 0;

/*
@@ -333,6 +333,7 @@ static int gru_try_dropin(struct gru_thr
write = (tfh->cause & TFHCAUSE_TLB_MOD) != 0;
vaddr = tfh->missvaddr;
asid = tfh->missasid;
+ indexway = tfh->indexway;
if (asid == 0)
goto failnoasid;

@@ -361,11 +362,12 @@ static int gru_try_dropin(struct gru_thr
gru_cb_set_istatus_active(cbk);
tfh_write_restart(tfh, gpa, GAA_RAM, vaddr, asid, write,
GRU_PAGESIZE(pageshift));
- STAT(tlb_dropin);
gru_dbg(grudev,
- "%s: tfh 0x%p, vaddr 0x%lx, asid 0x%x, ps %d, gpa 0x%lx\n",
- ret ? "non-atomic" : "atomic", tfh, vaddr, asid,
- pageshift, gpa);
+ "%s: gid %d, gts 0x%p, tfh 0x%p, vaddr 0x%lx, asid 0x%x, indexway 0x%x,"
+ " rw %d, ps %d, gpa 0x%lx\n",
+ atomic ? "atomic" : "non-atomic", gts->ts_gru->gs_gid, gts, tfh, vaddr, asid,
+ indexway, write, pageshift, gpa);
+ STAT(tlb_dropin);
return 0;

failnoasid:
@@ -460,12 +462,14 @@ static irqreturn_t gru_intr(int chiplet,
dmap.fault_bits[0], dmap.fault_bits[1]);

for_each_cbr_in_tfm(cbrnum, dmap.fault_bits) {
+ STAT(intr_cbr);
complete(gru->gs_blade->bs_async_wq);
gru_dbg(grudev, "gid %d, cbr_done %d, done %d\n",
gru->gs_gid, cbrnum, gru->gs_blade->bs_async_wq->done);
}

for_each_cbr_in_tfm(cbrnum, imap.fault_bits) {
+ STAT(intr_tfh);
tfh = get_tfh_by_index(gru, cbrnum);
prefetchw(tfh); /* Helps on hdw, required for emulator */

@@ -551,7 +555,6 @@ int gru_handle_user_call_os(unsigned lon
int ucbnum, cbrnum, ret = -EINVAL;

STAT(call_os);
- gru_dbg(grudev, "address 0x%lx\n", cb);

/* sanity check the cb pointer */
ucbnum = get_cb_number((void *)cb);
@@ -561,6 +564,7 @@ int gru_handle_user_call_os(unsigned lon
gts = gru_find_lock_gts(cb);
if (!gts)
return -EINVAL;
+ gru_dbg(grudev, "address 0x%lx, gid %d, gts 0x%p\n", cb, gts->ts_gru ? gts->ts_gru->gs_gid : -1, gts);

if (ucbnum >= gts->ts_cbr_au_count * GRU_CBR_AU_SIZE)
goto exit;
@@ -603,11 +607,11 @@ int gru_get_exception_detail(unsigned lo
if (copy_from_user(&excdet, (void __user *)arg, sizeof(excdet)))
return -EFAULT;

- gru_dbg(grudev, "address 0x%lx\n", excdet.cb);
gts = gru_find_lock_gts(excdet.cb);
if (!gts)
return -EINVAL;

+ gru_dbg(grudev, "address 0x%lx, gid %d, gts 0x%p\n", excdet.cb, gts->ts_gru ? gts->ts_gru->gs_gid : -1, gts);
ucbnum = get_cb_number((void *)excdet.cb);
if (ucbnum >= gts->ts_cbr_au_count * GRU_CBR_AU_SIZE) {
ret = -EINVAL;
Index: linux/drivers/misc/sgi-gru/grufile.c
===================================================================
--- linux.orig/drivers/misc/sgi-gru/grufile.c 2009-11-20 09:32:34.000000000 -0600
+++ linux/drivers/misc/sgi-gru/grufile.c 2009-11-20 09:32:34.000000000 -0600
@@ -192,7 +192,7 @@ static long gru_file_unlocked_ioctl(stru
{
int err = -EBADRQC;

- gru_dbg(grudev, "file %p\n", file);
+ gru_dbg(grudev, "file %p, req 0x%x, 0x%lx\n", file, req, arg);

switch (req) {
case GRU_CREATE_CONTEXT:
Index: linux/drivers/misc/sgi-gru/gruhandles.c
===================================================================
--- linux.orig/drivers/misc/sgi-gru/gruhandles.c 2009-11-20 09:32:33.000000000 -0600
+++ linux/drivers/misc/sgi-gru/gruhandles.c 2009-11-20 09:32:34.000000000 -0600
@@ -27,9 +27,11 @@
#ifdef CONFIG_IA64
#include <asm/processor.h>
#define GRU_OPERATION_TIMEOUT (((cycles_t) local_cpu_data->itc_freq)*10)
+#define CLKS2NSEC(c) ((c) *1000000000 / local_cpu_data->itc_freq)
#else
#include <asm/tsc.h>
#define GRU_OPERATION_TIMEOUT ((cycles_t) tsc_khz*10*1000)
+#define CLKS2NSEC(c) ((c) * 1000000 / tsc_khz)
#endif

/* Extract the status field from a kernel handle */
@@ -39,10 +41,13 @@ struct mcs_op_statistic mcs_op_statistic

static void update_mcs_stats(enum mcs_op op, unsigned long clks)
{
+ unsigned long nsec;
+
+ nsec = CLKS2NSEC(clks);
atomic_long_inc(&mcs_op_statistics[op].count);
- atomic_long_add(clks, &mcs_op_statistics[op].total);
- if (mcs_op_statistics[op].max < clks)
- mcs_op_statistics[op].max = clks;
+ atomic_long_add(nsec, &mcs_op_statistics[op].total);
+ if (mcs_op_statistics[op].max < nsec)
+ mcs_op_statistics[op].max = nsec;
}

static void start_instruction(void *h)
Index: linux/drivers/misc/sgi-gru/grukservices.c
===================================================================
--- linux.orig/drivers/misc/sgi-gru/grukservices.c 2009-11-20 09:32:33.000000000 -0600
+++ linux/drivers/misc/sgi-gru/grukservices.c 2009-11-20 09:32:34.000000000 -0600
@@ -414,8 +414,8 @@ char *gru_get_cb_exception_detail_str(in
if (ret > 0 && gen->istatus == CBS_EXCEPTION) {
gru_get_cb_exception_detail(cb, &excdet);
snprintf(buf, size,
- "GRU exception: cb %p, opc %d, exopc %d, ecause 0x%x,"
- "excdet0 0x%lx, excdet1 0x%x",
+ "GRU:%d exception: cb %p, opc %d, exopc %d, ecause 0x%x,"
+ "excdet0 0x%lx, excdet1 0x%x", smp_processor_id(),
gen, excdet.opc, excdet.exopc, excdet.ecause,
excdet.exceptdet0, excdet.exceptdet1);
} else {
@@ -604,6 +604,8 @@ static int send_noop_message(void *cb, s
ret = MQE_UNEXPECTED_CB_ERR;
break;
case CBSS_PAGE_OVERFLOW:
+ STAT(mesq_noop_page_overflow);
+ /* fallthru */
default:
BUG();
}
@@ -745,6 +747,9 @@ static int send_message_failure(void *cb
STAT(mesq_send_put_nacked);
ret = send_message_put_nacked(cb, mqd, mesg, lines);
break;
+ case CBSS_PAGE_OVERFLOW:
+ STAT(mesq_page_overflow);
+ /* fallthru */
default:
BUG();
}
@@ -837,7 +842,6 @@ void *gru_get_next_message(struct gru_me
int present = mhdr->present;

/* skip NOOP messages */
- STAT(mesq_receive);
while (present == MQS_NOOP) {
gru_free_message(mqd, mhdr);
mhdr = mq->next;
@@ -857,6 +861,7 @@ void *gru_get_next_message(struct gru_me
if (mhdr->lines == 2)
restore_present2(mhdr, mhdr->present2);

+ STAT(mesq_receive);
return mhdr;
}
EXPORT_SYMBOL_GPL(gru_get_next_message);
@@ -927,24 +932,24 @@ static int quicktest0(unsigned long arg)

gru_vload(cb, uv_gpa(&word0), gru_get_tri(dsr), XTYPE_DW, 1, 1, IMA);
if (gru_wait(cb) != CBS_IDLE) {
- printk(KERN_DEBUG "GRU quicktest0: CBR failure 1\n");
+ printk(KERN_DEBUG "GRU:%d quicktest0: CBR failure 1\n", smp_processor_id());
goto done;
}

if (*p != MAGIC) {
- printk(KERN_DEBUG "GRU: quicktest0 bad magic 0x%lx\n", *p);
+ printk(KERN_DEBUG "GRU:%d quicktest0 bad magic 0x%lx\n", smp_processor_id(), *p);
goto done;
}
gru_vstore(cb, uv_gpa(&word1), gru_get_tri(dsr), XTYPE_DW, 1, 1, IMA);
if (gru_wait(cb) != CBS_IDLE) {
- printk(KERN_DEBUG "GRU quicktest0: CBR failure 2\n");
+ printk(KERN_DEBUG "GRU:%d quicktest0: CBR failure 2\n", smp_processor_id());
goto done;
}

if (word0 != word1 || word1 != MAGIC) {
printk(KERN_DEBUG
- "GRU quicktest0 err: found 0x%lx, expected 0x%lx\n",
- word1, MAGIC);
+ "GRU:%d quicktest0 err: found 0x%lx, expected 0x%lx\n",
+ smp_processor_id(), word1, MAGIC);
goto done;
}
ret = 0;
@@ -981,8 +986,11 @@ static int quicktest1(unsigned long arg)
if (ret)
break;
}
- if (ret != MQE_QUEUE_FULL || i != 4)
+ if (ret != MQE_QUEUE_FULL || i != 4) {
+ printk(KERN_DEBUG "GRU:%d quicktest1: unexpect status %d, i %d\n",
+ smp_processor_id(), ret, i);
goto done;
+ }

for (i = 0; i < 6; i++) {
m = gru_get_next_message(&mqd);
@@ -990,7 +998,12 @@ static int quicktest1(unsigned long arg)
break;
gru_free_message(&mqd, m);
}
- ret = (i == 4) ? 0 : -EIO;
+ if (i != 4) {
+ printk(KERN_DEBUG "GRU:%d quicktest2: bad message, i %d, m %p, m8 %d\n",
+ smp_processor_id(), i, m, m ? m[8] : -1);
+ goto done;
+ }
+ ret = 0;

done:
kfree(p);
@@ -1069,7 +1082,7 @@ static int quicktest3(unsigned long arg)
memset(buf1, get_cycles() & 255, sizeof(buf1));
gru_copy_gpa(uv_gpa(buf2), uv_gpa(buf1), BUFSIZE);
if (memcmp(buf1, buf2, BUFSIZE)) {
- printk(KERN_DEBUG "GRU quicktest3 error\n");
+ printk(KERN_DEBUG "GRU:%d quicktest3 error\n", smp_processor_id());
ret = -EIO;
}
return ret;
Index: linux/drivers/misc/sgi-gru/grumain.c
===================================================================
--- linux.orig/drivers/misc/sgi-gru/grumain.c 2009-11-20 09:32:34.000000000 -0600
+++ linux/drivers/misc/sgi-gru/grumain.c 2009-11-20 09:32:34.000000000 -0600
@@ -370,6 +370,7 @@ struct gru_vma_data *gru_alloc_vma_data(
if (!vdata)
return NULL;

+ STAT(vdata_alloc);
INIT_LIST_HEAD(&vdata->vd_head);
spin_lock_init(&vdata->vd_lock);
gru_dbg(grudev, "alloc vdata %p\n", vdata);
@@ -552,7 +553,8 @@ void gru_unload_context(struct gru_threa
zap_vma_ptes(gts->ts_vma, UGRUADDR(gts), GRU_GSEG_PAGESIZE);
cch = get_cch(gru->gs_gru_base_vaddr, ctxnum);

- gru_dbg(grudev, "gts %p\n", gts);
+ gru_dbg(grudev, "gts %p, cbrmap 0x%lx, dsrmap 0x%lx\n",
+ gts, gts->ts_cbr_map, gts->ts_dsr_map);
lock_cch_handle(cch);
if (cch_interrupt_sync(cch))
BUG();
@@ -583,9 +585,7 @@ void gru_load_context(struct gru_thread_
struct gru_context_configuration_handle *cch;
int i, err, asid, ctxnum = gts->ts_ctxnum;

- gru_dbg(grudev, "gts %p\n", gts);
cch = get_cch(gru->gs_gru_base_vaddr, ctxnum);
-
lock_cch_handle(cch);
cch->tfm_fault_bit_enable =
(gts->ts_user_options == GRU_OPT_MISS_FMM_POLL
@@ -635,6 +635,10 @@ void gru_load_context(struct gru_thread_
if (cch_start(cch))
BUG();
unlock_cch_handle(cch);
+
+ gru_dbg(grudev, "gid %d, gts %p, cbrmap 0x%lx, dsrmap 0x%lx, tie %d, tis %d\n",
+ gts->ts_gru->gs_gid, gts, gts->ts_cbr_map, gts->ts_dsr_map,
+ (gts->ts_user_options == GRU_OPT_MISS_FMM_INTR), gts->ts_tlb_int_select);
}

/*
Index: linux/drivers/misc/sgi-gru/gruprocfs.c
===================================================================
--- linux.orig/drivers/misc/sgi-gru/gruprocfs.c 2009-11-20 09:32:30.000000000 -0600
+++ linux/drivers/misc/sgi-gru/gruprocfs.c 2009-11-20 09:32:34.000000000 -0600
@@ -36,8 +36,7 @@ static void printstat_val(struct seq_fil
{
unsigned long val = atomic_long_read(v);

- if (val)
- seq_printf(s, "%16lu %s\n", val, id);
+ seq_printf(s, "%16lu %s\n", val, id);
}

static int statistics_show(struct seq_file *s, void *p)
@@ -46,7 +45,8 @@ static int statistics_show(struct seq_fi
printstat(s, vdata_free);
printstat(s, gts_alloc);
printstat(s, gts_free);
- printstat(s, vdata_double_alloc);
+ printstat(s, gms_alloc);
+ printstat(s, gms_free);
printstat(s, gts_double_allocate);
printstat(s, assign_context);
printstat(s, assign_context_failed);
@@ -59,15 +59,15 @@ static int statistics_show(struct seq_fi
printstat(s, steal_kernel_context);
printstat(s, steal_context_failed);
printstat(s, nopfn);
- printstat(s, break_cow);
printstat(s, asid_new);
printstat(s, asid_next);
printstat(s, asid_wrap);
printstat(s, asid_reuse);
printstat(s, intr);
+ printstat(s, intr_cbr);
+ printstat(s, intr_tfh);
printstat(s, intr_mm_lock_failed);
printstat(s, call_os);
- printstat(s, call_os_check_for_bug);
printstat(s, call_os_wait_queue);
printstat(s, user_flush_tlb);
printstat(s, user_unload_context);
@@ -83,11 +83,9 @@ static int statistics_show(struct seq_fi
printstat(s, tlb_dropin_fail_idle);
printstat(s, tlb_dropin_fail_fmm);
printstat(s, tlb_dropin_fail_no_exception);
- printstat(s, tlb_dropin_fail_no_exception_war);
printstat(s, tfh_stale_on_fault);
printstat(s, mmu_invalidate_range);
printstat(s, mmu_invalidate_page);
- printstat(s, mmu_clear_flush_young);
printstat(s, flush_tlb);
printstat(s, flush_tlb_gru);
printstat(s, flush_tlb_gru_tgh);
@@ -104,7 +102,6 @@ static int statistics_show(struct seq_fi
printstat(s, mesq_send_qlimit_reached);
printstat(s, mesq_send_amo_nacked);
printstat(s, mesq_send_put_nacked);
- printstat(s, mesq_qf_not_full);
printstat(s, mesq_qf_locked);
printstat(s, mesq_qf_noop_not_full);
printstat(s, mesq_qf_switch_head_failed);
@@ -114,6 +111,7 @@ static int statistics_show(struct seq_fi
printstat(s, mesq_noop_qlimit_reached);
printstat(s, mesq_noop_amo_nacked);
printstat(s, mesq_noop_put_nacked);
+ printstat(s, mesq_noop_page_overflow);
return 0;
}

@@ -131,6 +129,7 @@ static int mcs_statistics_show(struct se
static char *id[] = {"cch_allocate", "cch_start", "cch_interrupt",
"cch_interrupt_sync", "cch_deallocate", "tgh_invalidate"};

+ seq_printf(s, "%-20s%12s%12s%12s\n", "#id", "count", "aver-clks", "max-clks");
for (op = 0; op < mcsop_last; op++) {
count = atomic_long_read(&mcs_op_statistics[op].count);
total = atomic_long_read(&mcs_op_statistics[op].total);
@@ -150,6 +149,7 @@ static ssize_t mcs_statistics_write(stru

static int options_show(struct seq_file *s, void *p)
{
+ seq_printf(s, "#bitmask: 1=trace, 2=statistics\n");
seq_printf(s, "0x%lx\n", gru_options);
return 0;
}
@@ -179,16 +179,17 @@ static int cch_seq_show(struct seq_file
const char *mode[] = { "??", "UPM", "INTR", "OS_POLL" };

if (gid == 0)
- seq_printf(file, "#%5s%5s%6s%9s%6s%8s%8s\n", "gid", "bid",
- "ctx#", "pid", "cbrs", "dsbytes", "mode");
+ seq_printf(file, "#%5s%5s%6s%7s%9s%6s%8s%8s\n", "gid", "bid",
+ "ctx#", "asid", "pid", "cbrs", "dsbytes", "mode");
if (gru)
for (i = 0; i < GRU_NUM_CCH; i++) {
ts = gru->gs_gts[i];
if (!ts)
continue;
- seq_printf(file, " %5d%5d%6d%9d%6d%8d%8s\n",
+ seq_printf(file, " %5d%5d%6d%7d%9d%6d%8d%8s\n",
gru->gs_gid, gru->gs_blade_id, i,
- ts->ts_tgid_owner,
+ is_kernel_context(ts) ? 0 : ts->ts_gms->ms_asids[gid].mt_asid,
+ is_kernel_context(ts) ? 0 : ts->ts_tgid_owner,
ts->ts_cbr_au_count * GRU_CBR_AU_SIZE,
ts->ts_cbr_au_count * GRU_DSR_AU_BYTES,
mode[ts->ts_user_options &
Index: linux/drivers/misc/sgi-gru/grutables.h
===================================================================
--- linux.orig/drivers/misc/sgi-gru/grutables.h 2009-11-20 09:32:34.000000000 -0600
+++ linux/drivers/misc/sgi-gru/grutables.h 2009-11-20 09:32:34.000000000 -0600
@@ -171,7 +171,8 @@ struct gru_stats_s {
atomic_long_t vdata_free;
atomic_long_t gts_alloc;
atomic_long_t gts_free;
- atomic_long_t vdata_double_alloc;
+ atomic_long_t gms_alloc;
+ atomic_long_t gms_free;
atomic_long_t gts_double_allocate;
atomic_long_t assign_context;
atomic_long_t assign_context_failed;
@@ -184,15 +185,15 @@ struct gru_stats_s {
atomic_long_t steal_kernel_context;
atomic_long_t steal_context_failed;
atomic_long_t nopfn;
- atomic_long_t break_cow;
atomic_long_t asid_new;
atomic_long_t asid_next;
atomic_long_t asid_wrap;
atomic_long_t asid_reuse;
atomic_long_t intr;
+ atomic_long_t intr_cbr;
+ atomic_long_t intr_tfh;
atomic_long_t intr_mm_lock_failed;
atomic_long_t call_os;
- atomic_long_t call_os_check_for_bug;
atomic_long_t call_os_wait_queue;
atomic_long_t user_flush_tlb;
atomic_long_t user_unload_context;
@@ -208,11 +209,9 @@ struct gru_stats_s {
atomic_long_t tlb_dropin_fail_idle;
atomic_long_t tlb_dropin_fail_fmm;
atomic_long_t tlb_dropin_fail_no_exception;
- atomic_long_t tlb_dropin_fail_no_exception_war;
atomic_long_t tfh_stale_on_fault;
atomic_long_t mmu_invalidate_range;
atomic_long_t mmu_invalidate_page;
- atomic_long_t mmu_clear_flush_young;
atomic_long_t flush_tlb;
atomic_long_t flush_tlb_gru;
atomic_long_t flush_tlb_gru_tgh;
@@ -231,7 +230,7 @@ struct gru_stats_s {
atomic_long_t mesq_send_qlimit_reached;
atomic_long_t mesq_send_amo_nacked;
atomic_long_t mesq_send_put_nacked;
- atomic_long_t mesq_qf_not_full;
+ atomic_long_t mesq_page_overflow;
atomic_long_t mesq_qf_locked;
atomic_long_t mesq_qf_noop_not_full;
atomic_long_t mesq_qf_switch_head_failed;
@@ -241,6 +240,7 @@ struct gru_stats_s {
atomic_long_t mesq_noop_qlimit_reached;
atomic_long_t mesq_noop_amo_nacked;
atomic_long_t mesq_noop_put_nacked;
+ atomic_long_t mesq_noop_page_overflow;

};

@@ -255,8 +255,8 @@ struct mcs_op_statistic {

extern struct mcs_op_statistic mcs_op_statistics[mcsop_last];

-#define OPT_DPRINT 1
-#define OPT_STATS 2
+#define OPT_DPRINT 1
+#define OPT_STATS 2


#define IRQ_GRU 110 /* Starting IRQ number for interrupts */
@@ -279,7 +279,7 @@ extern struct mcs_op_statistic mcs_op_st
#define gru_dbg(dev, fmt, x...) \
do { \
if (gru_options & OPT_DPRINT) \
- dev_dbg(dev, "%s: " fmt, __func__, x); \
+ printk(KERN_DEBUG "GRU:%d %s: " fmt, smp_processor_id(), __func__, x);\
} while (0)
#else
#define gru_dbg(x...)
Index: linux/drivers/misc/sgi-gru/grutlbpurge.c
===================================================================
--- linux.orig/drivers/misc/sgi-gru/grutlbpurge.c 2009-11-20 09:32:31.000000000 -0600
+++ linux/drivers/misc/sgi-gru/grutlbpurge.c 2009-11-20 09:32:34.000000000 -0600
@@ -184,8 +184,8 @@ void gru_flush_tlb_range(struct gru_mm_s
STAT(flush_tlb_gru_tgh);
asid = GRUASID(asid, start);
gru_dbg(grudev,
- " FLUSH gruid %d, asid 0x%x, num %ld, cbmap 0x%x\n",
- gid, asid, num, asids->mt_ctxbitmap);
+ " FLUSH gruid %d, asid 0x%x, vaddr 0x%lx, vamask 0x%x, num %ld, cbmap 0x%x\n",
+ gid, asid, start, grupagesize, num, asids->mt_ctxbitmap);
tgh = get_lock_tgh_handle(gru);
tgh_invalidate(tgh, start, ~0, asid, grupagesize, 0,
num - 1, asids->mt_ctxbitmap);
@@ -308,6 +308,7 @@ struct gru_mm_struct *gru_register_mmu_n
} else {
gms = kzalloc(sizeof(*gms), GFP_KERNEL);
if (gms) {
+ STAT(gms_alloc);
spin_lock_init(&gms->ms_asid_lock);
gms->ms_notifier.ops = &gru_mmuops;
atomic_set(&gms->ms_refcnt, 1);
@@ -333,6 +334,7 @@ void gru_drop_mmu_notifier(struct gru_mm
if (!gms->ms_released)
mmu_notifier_unregister(&gms->ms_notifier, current->mm);
kfree(gms);
+ STAT(gms_free);
}
}


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