gru: collect per-context user statistics

Collect GRU statistics for each user GRU context.  Statistics are kept for
TLB misses & content resource contention.  Add user request for retrieving
the statistics.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/misc/sgi-gru/grumain.c b/drivers/misc/sgi-gru/grumain.c
index e38a0f1775ff..347004e4f591 100644
--- a/drivers/misc/sgi-gru/grumain.c
+++ b/drivers/misc/sgi-gru/grumain.c
@@ -744,6 +744,7 @@ void gru_steal_context(struct gru_thread_state *gts, int blade_id)
         spin_unlock(&blade->bs_lock);
 
         if (ngts) {
+                gts->ustats.context_stolen++;
                 ngts->ts_steal_jiffies = jiffies;
                 gru_unload_context(ngts, is_kernel_context(ngts) ? 0 : 1);
                 gts_stolen(ngts, blade);