3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright (c) 1986, 2010, Oracle and/or its affiliates. All rights reserved.

  23  */
  24 
  25 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T     */
  26 /*        All Rights Reserved   */
  27 
  28 /*
  29  * University Copyright- Copyright (c) 1982, 1986, 1988
  30  * The Regents of the University of California
  31  * All Rights Reserved
  32  *
  33  * University Acknowledgment- Portions of this document are derived from
  34  * software developed by the University of California, Berkeley, and its
  35  * contributors.
  36  */
  37 
  38 #include <sys/types.h>
  39 #include <sys/t_lock.h>
  40 #include <sys/param.h>
  41 #include <sys/errno.h>
  42 #include <sys/debug.h>

  56 #include <sys/vnode.h>
  57 #include <sys/file.h>
  58 #include <sys/vm.h>
  59 
  60 #include <sys/swap.h>
  61 #include <sys/vtrace.h>
  62 #include <sys/tnf_probe.h>
  63 #include <sys/fs/snode.h>
  64 #include <sys/copyops.h>
  65 #include <sys/conf.h>
  66 #include <sys/sdt.h>
  67 
  68 #include <vm/anon.h>
  69 #include <vm/hat.h>
  70 #include <vm/as.h>
  71 #include <vm/seg.h>
  72 #include <vm/page.h>
  73 #include <vm/seg_vn.h>
  74 #include <vm/seg_kmem.h>
  75 
  76 extern int maxphys;
  77 
  78 void
  79 minphys(struct buf *bp)
  80 {
  81         if (bp->b_bcount > maxphys)
  82                 bp->b_bcount = maxphys;
  83 }
  84 
  85 /*
  86  * use kmem_cache_create for physio buffers. This has shown
  87  * a better cache distribution compared to buffers on the
  88  * stack. It also avoids semaphore construction/deconstruction
  89  * per request
  90  */
  91 
  92 static struct kmem_cache *physio_buf_cache;
  93 
  94 /* ARGSUSED */
  95 static int
  96 physio_buf_constructor(void *buf, void *cdrarg, int kmflags)

   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright (c) 1986, 2010, Oracle and/or its affiliates. All rights reserved.
  23  * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
  24  */
  25 
  26 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T     */
  27 /*        All Rights Reserved   */
  28 
  29 /*
  30  * University Copyright- Copyright (c) 1982, 1986, 1988
  31  * The Regents of the University of California
  32  * All Rights Reserved
  33  *
  34  * University Acknowledgment- Portions of this document are derived from
  35  * software developed by the University of California, Berkeley, and its
  36  * contributors.
  37  */
  38 
  39 #include <sys/types.h>
  40 #include <sys/t_lock.h>
  41 #include <sys/param.h>
  42 #include <sys/errno.h>
  43 #include <sys/debug.h>

  57 #include <sys/vnode.h>
  58 #include <sys/file.h>
  59 #include <sys/vm.h>
  60 
  61 #include <sys/swap.h>
  62 #include <sys/vtrace.h>
  63 #include <sys/tnf_probe.h>
  64 #include <sys/fs/snode.h>
  65 #include <sys/copyops.h>
  66 #include <sys/conf.h>
  67 #include <sys/sdt.h>
  68 
  69 #include <vm/anon.h>
  70 #include <vm/hat.h>
  71 #include <vm/as.h>
  72 #include <vm/seg.h>
  73 #include <vm/page.h>
  74 #include <vm/seg_vn.h>
  75 #include <vm/seg_kmem.h>
  76 
  77 #include <sys/sunddi.h>
  78 
  79 void
  80 minphys(struct buf *bp)
  81 {
  82         if (bp->b_bcount > maxphys)
  83                 bp->b_bcount = maxphys;
  84 }
  85 
  86 /*
  87  * use kmem_cache_create for physio buffers. This has shown
  88  * a better cache distribution compared to buffers on the
  89  * stack. It also avoids semaphore construction/deconstruction
  90  * per request
  91  */
  92 
  93 static struct kmem_cache *physio_buf_cache;
  94 
  95 /* ARGSUSED */
  96 static int
  97 physio_buf_constructor(void *buf, void *cdrarg, int kmflags)