[SPARC64]: Dynamically grow TSB in response to RSS growth.

As the RSS grows, grow the TSB in order to reduce the likelyhood
of hash collisions and thus poor hit rates in the TSB.

This definitely needs some serious tuning.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/asm-sparc64/mmu.h b/include/asm-sparc64/mmu.h
index 2effeba2476c..76008ff6a90b 100644
--- a/include/asm-sparc64/mmu.h
+++ b/include/asm-sparc64/mmu.h
@@ -100,6 +100,7 @@ struct tsb {
 typedef struct {
         unsigned long   sparc64_ctx_val;
         struct tsb      *tsb;
+        unsigned long   tsb_rss_limit;
         unsigned long   tsb_nentries;
         unsigned long   tsb_reg_val;
         unsigned long   tsb_map_vaddr;