commit c550222f64265c9384c45d7f691445386025a82b
author Jack Steiner <steiner@sgi.com> Tue Dec 15 16:48:13 2009 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> Wed Dec 16 07:20:16 2009 -0800
tree 562d45bf656c8bafc9c0dd5b3897dba5da6ae9a3
parent 57ebb0342c12f00e7a6d15ba59bb6c3ee501c3af

gru: preload tlb for bcopy instructions

Add anticipatory TLB dropins for GRU TLB misses that occur on BCOPY
instructions that copy large amounts of data.

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>

drivers/misc/sgi-gru/grumain.c

diff --git a/drivers/misc/sgi-gru/grumain.c b/drivers/misc/sgi-gru/grumain.c
index ebabbdc..ade0925 100644
--- a/drivers/misc/sgi-gru/grumain.c
+++ b/drivers/misc/sgi-gru/grumain.c
@@ -316,7 +316,8 @@
  * Allocate a thread state structure.
  */
 struct gru_thread_state *gru_alloc_gts(struct vm_area_struct *vma,
-		int cbr_au_count, int dsr_au_count, int options, int tsid)
+		int cbr_au_count, int dsr_au_count,
+		unsigned char tlb_preload_count, int options, int tsid)
 {
 	struct gru_thread_state *gts;
 	struct gru_mm_struct *gms;
@@ -334,6 +335,7 @@
 	mutex_init(&gts->ts_ctxlock);
 	gts->ts_cbr_au_count = cbr_au_count;
 	gts->ts_dsr_au_count = dsr_au_count;
+	gts->ts_tlb_preload_count = tlb_preload_count;
 	gts->ts_user_options = options;
 	gts->ts_user_blade_id = -1;
 	gts->ts_user_chiplet_id = -1;
@@ -403,7 +405,9 @@
 	struct gru_vma_data *vdata = vma->vm_private_data;
 	struct gru_thread_state *gts, *ngts;
 
-	gts = gru_alloc_gts(vma, vdata->vd_cbr_au_count, vdata->vd_dsr_au_count,
+	gts = gru_alloc_gts(vma, vdata->vd_cbr_au_count,
+			    vdata->vd_dsr_au_count,
+			    vdata->vd_tlb_preload_count,
 			    vdata->vd_user_options, tsid);
 	if (IS_ERR(gts))
 		return gts;