X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=module%2Fzfs%2Finclude%2Fsys%2Fdmu_impl.h;h=22f9f5f8c88c4533a7b01bd39f8ede22afd09dfa;hb=428870ff734fdaccc342b33fc53cf94724409a46;hp=3868a5816440fd8318d678446413978c0f523a23;hpb=6119cb885a976e175a6e827894accf657ff1984f;p=zfs.git

diff --git a/module/zfs/include/sys/dmu_impl.h b/module/zfs/include/sys/dmu_impl.h
index 3868a58..22f9f5f 100644
--- a/module/zfs/include/sys/dmu_impl.h
+++ b/module/zfs/include/sys/dmu_impl.h
@@ -19,7 +19,7 @@
  * CDDL HEADER END
  */
 /*
- * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
@@ -210,8 +210,7 @@ extern "C" {
  *
  * ds_lock
  *    protects:
- *    	ds_user_ptr
- *    	ds_user_evict_func
+ *    	ds_objset
  *    	ds_open_refcount
  *    	ds_snapname
  *    	ds_phys accounting
@@ -233,6 +232,39 @@ extern "C" {
 struct objset;
 struct dmu_pool;
 
+typedef struct dmu_xuio {
+	int next;
+	int cnt;
+	struct arc_buf **bufs;
+	iovec_t *iovp;
+} dmu_xuio_t;
+
+typedef struct xuio_stats {
+	/* loaned yet not returned arc_buf */
+	kstat_named_t xuiostat_onloan_rbuf;
+	kstat_named_t xuiostat_onloan_wbuf;
+	/* whether a copy is made when loaning out a read buffer */
+	kstat_named_t xuiostat_rbuf_copied;
+	kstat_named_t xuiostat_rbuf_nocopy;
+	/* whether a copy is made when assigning a write buffer */
+	kstat_named_t xuiostat_wbuf_copied;
+	kstat_named_t xuiostat_wbuf_nocopy;
+} xuio_stats_t;
+
+static xuio_stats_t xuio_stats = {
+	{ "onloan_read_buf",	KSTAT_DATA_UINT64 },
+	{ "onloan_write_buf",	KSTAT_DATA_UINT64 },
+	{ "read_buf_copied",	KSTAT_DATA_UINT64 },
+	{ "read_buf_nocopy",	KSTAT_DATA_UINT64 },
+	{ "write_buf_copied",	KSTAT_DATA_UINT64 },
+	{ "write_buf_nocopy",	KSTAT_DATA_UINT64 }
+};
+
+#define	XUIOSTAT_INCR(stat, val)	\
+	atomic_add_64(&xuio_stats.stat.value.ui64, (val))
+#define	XUIOSTAT_BUMP(stat)	XUIOSTAT_INCR(stat, 1)
+
+
 #ifdef	__cplusplus
 }
 #endif