X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Fportals%2Fknals%2Fsocknal%2Fsocknal.h;h=20cd3d923fc57d807ef39db8abcc4917ec64afaa;hb=23c2768cfacd6f9fb9dbabbfae9fc7ba5e7b129d;hp=b8bbefdbad8f55a472687fa4746626f8ccf3fc69;hpb=fb1d86804d2e9f82045c5198b2a9850321c64fb9;p=fs%2Flustre-release.git

diff --git a/lustre/portals/knals/socknal/socknal.h b/lustre/portals/knals/socknal/socknal.h
index b8bbefd..20cd3d9 100644
--- a/lustre/portals/knals/socknal/socknal.h
+++ b/lustre/portals/knals/socknal/socknal.h
@@ -104,6 +104,11 @@
 
 #define SOCKNAL_TX_LOW_WATER(sk) (((sk)->sk_sndbuf*8)/10)
 
+#define SOCKNAL_SINGLE_FRAG_TX      0           /* disable multi-fragment sends */
+#define SOCKNAL_SINGLE_FRAG_RX      0           /* disable multi-fragment receives */
+#define SOCKNAL_RISK_KMAP_DEADLOCK  0           /* risk kmap deadlock on multi-frag I/O 
+                                                 * (backs off to single-frag if disabled) */
+                                                
 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,72))
 # define sk_allocation  allocation
 # define sk_data_ready	data_ready
@@ -349,6 +354,13 @@ typedef struct ksock_conn
         atomic_t            ksnc_tx_nob;        /* # bytes queued */
         int                 ksnc_tx_ready;      /* write space */
         int                 ksnc_tx_scheduled;  /* being progressed */
+
+#if !SOCKNAL_SINGLE_FRAG_RX
+        struct iovec        ksnc_rx_scratch_iov[PTL_MD_MAX_IOV];
+#endif
+#if !SOCKNAL_SINGLE_FRAG_TX
+        struct iovec        ksnc_tx_scratch_iov[PTL_MD_MAX_IOV];
+#endif
 } ksock_conn_t;
 
 #define KSNR_TYPED_ROUTES   ((1 << SOCKNAL_CONN_CONTROL) |      \