[SPARC64]: Optimized TSB table initialization.
We only need to write an invalid tag every 16 bytes,
so taking advantage of this can save many instructions
compared to the simple memset() call we make now.
A prefetching implementation is implemented for sun4u
and a block-init store version if implemented for Niagara.
The next trick is to be able to perform an init and
a copy_tsb() in parallel when growing a TSB table.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/mm/tsb.c b/arch/sparc64/mm/tsb.c
index 1af797a..b2064e2 100644
--- a/arch/sparc64/mm/tsb.c
+++ b/arch/sparc64/mm/tsb.c
@@ -313,7 +313,7 @@
}
/* Mark all tags as invalid. */
- memset(new_tsb, 0x40, new_size);
+ tsb_init(new_tsb, new_size);
/* Ok, we are about to commit the changes. If we are
* growing an existing TSB the locking is very tricky,