staging: lustre: rpc: increase bulk size

To make the ptlrpc be able to size 16MB IO

Signed-off-by: Jinshan Xiong <jinshan.xiong@intel.com>
Signed-off-by: Gu Zheng <gzheng@ddn.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-7990
Reviewed-on: http://review.whamcloud.com/19366
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h b/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h
index 6831e4d3ab5fe4ae5b92a1a5b330c2561797ebd4..65ce503ad5950a9d98c8418a30792b92e9308be5 100644 (file)
--- a/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h
+++ b/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h
@@ -1650,8 +1650,12 @@ struct obd_ioobj {
        __u32           ioo_bufcnt;     /* number of niobufs for this object */
 };
 
+/*
+ * NOTE: IOOBJ_MAX_BRW_BITS defines the _offset_ of the max_brw field in
+ * ioo_max_brw, NOT the maximum number of bits in PTLRPC_BULK_OPS_BITS.
+ * That said, ioo_max_brw is a 32-bit field so the limit is also 16 bits.
+ */
 #define IOOBJ_MAX_BRW_BITS     16
-#define IOOBJ_TYPE_MASK                ((1U << IOOBJ_MAX_BRW_BITS) - 1)
 #define ioobj_max_brw_get(ioo) (((ioo)->ioo_max_brw >> IOOBJ_MAX_BRW_BITS) + 1)
 #define ioobj_max_brw_set(ioo, num)                                    \
 do { (ioo)->ioo_max_brw = ((num) - 1) << IOOBJ_MAX_BRW_BITS; } while (0)

diff --git a/drivers/staging/lustre/lustre/include/lustre_net.h b/drivers/staging/lustre/lustre/include/lustre_net.h
index 2be135d1fc9398bc2643f92b0ee71758f44ff3c2..411eb0dc7f381ddac6ed5a8f5a2876454036ac9c 100644 (file)
--- a/drivers/staging/lustre/lustre/include/lustre_net.h
+++ b/drivers/staging/lustre/lustre/include/lustre_net.h
@@ -69,13 +69,17 @@
 #define PTLRPC_MD_OPTIONS  0
 
 /**
- * Max # of bulk operations in one request.
+ * log2 max # of bulk operations in one request: 2=4MB/RPC, 5=32MB/RPC, ...
  * In order for the client and server to properly negotiate the maximum
  * possible transfer size, PTLRPC_BULK_OPS_COUNT must be a power-of-two
  * value.  The client is free to limit the actual RPC size for any bulk
  * transfer via cl_max_pages_per_rpc to some non-power-of-two value.
+ * NOTE: This is limited to 16 (=64GB RPCs) by IOOBJ_MAX_BRW_BITS.
  */
-#define PTLRPC_BULK_OPS_BITS   2
+#define PTLRPC_BULK_OPS_BITS   4
+#if PTLRPC_BULK_OPS_BITS > 16
+#error "More than 65536 BRW RPCs not allowed by IOOBJ_MAX_BRW_BITS."
+#endif
 #define PTLRPC_BULK_OPS_COUNT  (1U << PTLRPC_BULK_OPS_BITS)
 /**
  * PTLRPC_BULK_OPS_MASK is for the convenience of the client only, and

diff --git a/drivers/staging/lustre/lustre/ptlrpc/wiretest.c b/drivers/staging/lustre/lustre/ptlrpc/wiretest.c
index f50f487ab450b0c628ed2d3952ecf21281208704..e12eb83b1940a98747d6c930230d10a06c46371e 100644 (file)
--- a/drivers/staging/lustre/lustre/ptlrpc/wiretest.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/wiretest.c
@@ -1576,6 +1576,8 @@ void lustre_assert_wire_constants(void)
                 (long long)(int)offsetof(struct obd_ioobj, ioo_bufcnt));
        LASSERTF((int)sizeof(((struct obd_ioobj *)0)->ioo_bufcnt) == 4, "found %lld\n",
                 (long long)(int)sizeof(((struct obd_ioobj *)0)->ioo_bufcnt));
+       LASSERTF(IOOBJ_MAX_BRW_BITS == 16, "found %lld\n",
+                (long long)IOOBJ_MAX_BRW_BITS);
 
        /* Checks for union lquota_id */
        LASSERTF((int)sizeof(union lquota_id) == 16, "found %lld\n",