[PATCH 3/8] dmaengine: mv_xor: Enlarge descriptor pool size
From: Maxime Ripard
Date: Tue May 12 2015 - 11:42:35 EST
From: Lior Amsalem <alior@xxxxxxxxxxx>
Now that we have 2 channels assigned to 2 CPUs and all requests are chained
on same channels, we need much more descriptors available to satisfy
async_tx workload.
3072 descriptors was found in our lab as the number of descriptors which
allow the async_tx stack to work without waiting for free descriptors on
submission of new requests.
Signed-off-by: Lior Amsalem <alior@xxxxxxxxxxx>
Reviewed-by: Nadav Haklai <nadavh@xxxxxxxxxxx>
Tested-by: Nadav Haklai <nadavh@xxxxxxxxxxx>
Signed-off-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx>
---
drivers/dma/mv_xor.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/dma/mv_xor.h b/drivers/dma/mv_xor.h
index 89a8c85539a1..145ba2f895f7 100644
--- a/drivers/dma/mv_xor.h
+++ b/drivers/dma/mv_xor.h
@@ -19,7 +19,7 @@
#include <linux/dmaengine.h>
#include <linux/interrupt.h>
-#define MV_XOR_POOL_SIZE PAGE_SIZE
+#define MV_XOR_POOL_SIZE (MV_XOR_SLOT_SIZE * 3072)
#define MV_XOR_SLOT_SIZE 64
#define MV_XOR_THRESHOLD 1
#define MV_XOR_MAX_CHANNELS 2
--
2.4.0
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