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Index: share/man/man4/mpr.4
===================================================================
--- share/man/man4/mpr.4
+++ share/man/man4/mpr.4
@@ -38,7 +38,7 @@
.\" $Id$
.\" $FreeBSD$
.\"
-.Dd April 29, 2016
+.Dd July 6, 2016
.Dt MPR 4
.Os
.Sh NAME
@@ -156,6 +156,29 @@
dev.mpr.X.io_cmds_active
.Xr sysctl 8
variable.
+.Ed
+.Pp
+To set the maximum number of pages that will be used per I/O for all adapters,
+set this tunable in
+.Xr loader.conf 5 :
+.Bd -literal -offset indent
+hw.mpr.max_io_pages=NNNN
+.Ed
+.Pp
+To set the maximum number of pages that will be used per I/O for a specific
+adapter, set this tunable in
+.Xr loader.conf 5 :
+.Bd -literal -offset indent
+dev.mpr.X.max_io_pages=NNNN
+.Ed
+.Pp
+The default max_io_pages value is -1, meaning that the maximum I/O size that
+will be used per I/O will be calculated using the IOCFacts values stored in
+the controller.
+The lowest value that the driver will use for max_io_pages is 1, otherwise
+IOCFacts will be used to calculate the maximum I/O size.
+The smaller I/O size calculated from either max_io_pages or IOCFacts will be the
+maximum I/O size used by the driver.
.Pp
The highest number of active I/O commands seen since boot is stored in the
dev.mpr.X.io_cmds_highwater
@@ -220,7 +243,7 @@
command might not be discovered by the driver.
This problem can sometimes be overcome by increasing the value of the spinup
wait time in
-.Xr loader.conf 5 :
+.Xr loader.conf 5
with the
.Bd -literal -offset indent
hw.mpr.spinup_wait_time=NNNN
Index: share/man/man4/mps.4
===================================================================
--- share/man/man4/mps.4
+++ share/man/man4/mps.4
@@ -1,5 +1,8 @@
.\"
.\" Copyright (c) 2010 Spectra Logic Corporation
+.\" Copyright (c) 2014 LSI Corp
+.\" Copyright (c) 2016 Avago Technologies
+.\" Copyright (c) 2016 Broadcom Ltd.
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
@@ -30,25 +33,27 @@
.\" mps driver man page.
.\"
.\" Author: Ken Merry <ken@FreeBSD.org>
+.\" Author: Stephen McConnell <slm@FreeBSD.org>
.\"
.\" $Id: //depot/SpectraBSD/head/share/man/man4/mps.4#6 $
.\" $FreeBSD$
.\"
-.Dd December 9, 2015
+.Dd July 5, 2016
.Dt MPS 4
.Os
.Sh NAME
.Nm mps
-.Nd LSI Fusion-MPT 2 Serial Attached SCSI driver
+.Nd "LSI Fusion-MPT 2 IT/IR 6Gb/s Serial Attached SCSI/SATA driver"
.Sh SYNOPSIS
-To compile this driver into your kernel,
-place the following lines in your kernel configuration file:
+To compile this driver into the kernel, place these lines in the kernel
+configuration file:
.Bd -ragged -offset indent
+.Cd "device pci"
.Cd "device scbus"
.Cd "device mps"
.Ed
.Pp
-Or, to load the driver as a module at boot, place the following line in
+The driver can be loaded as a module at boot time by placing this line in
.Xr loader.conf 5 :
.Bd -literal -offset indent
mps_load="YES"
@@ -56,35 +61,30 @@
.Sh DESCRIPTION
The
.Nm
-driver provides support for LSI Logic Fusion-MPT 2
+driver provides support for Broadcom Ltd./Avago Tech (LSI)
+Fusion-MPT 2 IT/IR
.Tn SAS
controllers and WarpDrive solid state storage cards.
.Sh HARDWARE
-The
+These controllers are supported by the
.Nm
-driver supports the following hardware:
+driver:
.Pp
.Bl -bullet -compact
.It
-LSI Logic SAS2004 (4 Port
-.Tn SAS )
+Broadcom Ltd./Avago Tech (LSI) SAS 2004 (4 Port SAS)
.It
-LSI Logic SAS2008 (8 Port
-.Tn SAS )
+Broadcom Ltd./Avago Tech (LSI) SAS 2008 (8 Port SAS)
.It
-LSI Logic SAS2108 (8 Port
-.Tn SAS )
+Broadcom Ltd./Avago Tech (LSI) SAS 2108 (8 Port SAS)
.It
-LSI Logic SAS2116 (16 Port
-.Tn SAS )
+Broadcom Ltd./Avago Tech (LSI) SAS 2116 (16 Port SAS)
.It
-LSI Logic SAS2208 (8 Port
-.Tn SAS )
+Broadcom Ltd./Avago Tech (LSI) SAS 2208 (8 Port SAS)
.It
-LSI Logic SAS2308 (8 Port
-.Tn SAS )
+Broadcom Ltd./Avago Tech (LSI) SAS 2308 (8 Port SAS)
.It
-LSI Logic SSS6200 Solid State Storage
+Broadcom Ltd./Avago Tech (LSI) SSS6200 Solid State Storage
.It
Intel Integrated RAID Module RMS25JB040
.It
@@ -95,9 +95,12 @@
Intel Integrated RAID Module RMS25KB080
.El
.Sh CONFIGURATION
+.Pp
+In all tunable descriptions below, X represents the adapter number.
+.Pp
To disable MSI interrupts for all
.Nm
-driver instances, set the following tunable value in
+driver instances, set this tunable value in
.Xr loader.conf 5 :
.Bd -literal -offset indent
hw.mps.disable_msi=1
@@ -105,17 +108,15 @@
.Pp
To disable MSI interrupts for a specific
.Nm
-driver instance, set the following tunable value in
+driver instance, set this tunable value in
.Xr loader.conf 5 :
.Bd -literal -offset indent
dev.mps.X.disable_msi=1
.Ed
.Pp
-where X is the adapter number.
-.Pp
To disable MSI-X interrupts for all
.Nm
-driver instances, set the following tunable value in
+driver instances, set this tunable value in
.Xr loader.conf 5 :
.Bd -literal -offset indent
hw.mps.disable_msix=1
@@ -123,84 +124,157 @@
.Pp
To disable MSI-X interrupts for a specific
.Nm
-driver instance, set the following tunable value in
+driver instance, set this tunable value in
.Xr loader.conf 5 :
.Bd -literal -offset indent
dev.mps.X.disable_msix=1
.Ed
.Pp
-where X is the adapter number.
-.Pp
-To set the maximum number of DMA chains allocated for all adapters,
-set the following variable in
+To set the maximum number of DMA chains allocated for all adapters, set this
+tunable in
.Xr loader.conf 5 :
.Bd -literal -offset indent
hw.mps.max_chains=NNNN
.Ed
.Pp
To set the maximum number of DMA chains allocated for a specific adapter,
-set the following variable in
+set this tunable in
.Xr loader.conf 5 :
.Bd -literal -offset indent
dev.mps.X.max_chains=NNNN
.Ed
.Pp
-This variable may also be viewed via
-.Xr sysctl 8
-to see the maximum set for a given adapter.
+The default max_chains value is 2048.
.Pp
-The current number of free chain frames may be seen via the
+The current number of free chain frames is stored in the
dev.mps.X.chain_free
.Xr sysctl 8
variable.
.Pp
-The lowest number of free chain frames may be seen via the
+The lowest number of free chain frames seen since boot is stored in the
dev.mps.X.chain_free_lowwater
.Xr sysctl 8
variable.
.Pp
+The number of times that chain frame allocations have failed since boot is
+stored in the
+dev.mps.X.chain_alloc_fail
+.Xr sysctl 8
+variable.
+This can be used to determine whether the max_chains tunable should be
+increased to help performance.
+.Pp
The current number of active I/O commands is shown in the
dev.mps.X.io_cmds_active
.Xr sysctl 8
variable.
+.Ed
+.Pp
+To set the maximum number of pages that will be used per I/O for all adapters,
+set this tunable in
+.Xr loader.conf 5 :
+.Bd -literal -offset indent
+hw.mps.max_io_pages=NNNN
+.Ed
.Pp
-The maximum number of active I/O command seen since boot is shown in the
+To set the maximum number of pages that will be used per I/O for a specific
+adapter, set this tunable in
+.Xr loader.conf 5 :
+.Bd -literal -offset indent
+dev.mps.X.max_io_pages=NNNN
+.Ed
+.Pp
+The default max_io_pages value is -1, meaning that the maximum I/O size that
+will be used per I/O will be calculated using the IOCFacts values stored in
+the controller.
+The lowest value that the driver will use for max_io_pages is 1, otherwise
+IOCFacts will be used to calculate the maximum I/O size.
+The smaller I/O size calculated from either max_io_pages or IOCFacts will be the
+maximum I/O size used by the driver.
+.Pp
+The highest number of active I/O commands seen since boot is stored in the
dev.mps.X.io_cmds_highwater
.Xr sysctl 8
variable.
.Pp
+Devices can be excluded from
+.Nm
+control for all adapters by setting this tunable in
+.Xr loader.conf 5 :
+.Bd -literal -offset indent
+hw.mps.exclude_ids=Y
+.Ed
+.Pp
+Y represents the target ID of the device.
+If more than one device is to be excluded, target IDs are separated by commas.
+.Pp
+Devices can be excluded from
+.Nm
+control for a specific adapter by setting this tunable in
+.Xr loader.conf 5 :
+.Bd -literal -offset indent
+dev.mps.X.exclude_ids=Y
+.Ed
+.Pp
+Y represents the target ID of the device.
+If more than one device is to be excluded, target IDs are separated by commas.
+.Pp
The adapter can issue the
.Sy StartStopUnit
-SCSI command to SATA direct-access devices during shutdown, to allow the
-device to quiesce before being powered down.
+SCSI command to SATA direct-access devices during shutdown.
+This allows the device to quiesce powering down.
To control this feature for all adapters, set the
.Bd -literal -offset indent
hw.mps.enable_ssu
.Ed
.Pp
-tunable value in
+tunable in
.Xr loader.conf 5
-to one of the following values:
+to one of these values:
.Bl -tag -width 6n -offset indent
.It 0
Do not send SSU to either HDDs or SSDs.
.It 1
-Send SSU to SSDs, but not to HDDs; this is the default value.
+Send SSU to SSDs, but not to HDDs.
+This is the default value.
.It 2
Send SSU to HDDs, but not to SSDs.
.It 3
Send SSU to both HDDs and SSDs.
.El
.Pp
-To control the feature for a specific adapter, set the following tunable
-value in
+To control the feature for a specific adapter, set this tunable value in
.Xr loader.conf 5 :
.Bd -literal -offset indent
dev.mps.X.enable_ssu
.Ed
.Pp
-where X is the adapter number.
-The same set of values are valid as for all adapters.
+The same set of values are valid when setting this tunable for all adapters.
+.Pp
+SATA disks that take several seconds to spin up and fail the SATA Identify
+command might not be discovered by the driver.
+This problem can sometimes be overcome by increasing the value of the spinup
+wait time in
+.Xr loader.conf 5
+with the
+.Bd -literal -offset indent
+hw.mps.spinup_wait_time=NNNN
+.Ed
+.Pp
+tunable.
+NNNN represents the number of seconds to wait for SATA devices to spin up when
+the device fails the initial SATA Identify command.
+.Pp
+Spinup wait times can be set for specific adapters in
+.Xr loader.conf 5 :
+with the
+.Bd -literal -offset indent
+dev.mps.X.spinup_wait_time=NNNN
+.Ed
+.Pp
+tunable.
+NNNN is the number of seconds to wait for SATA devices to spin up when they fail
+the initial SATA Identify command.
.Sh DEBUGGING
To enable debugging prints from the
.Nm
@@ -209,25 +283,30 @@
hw.mps.X.debug_level
.Ed
.Pp
-variable, where X is the adapter number, either in
+tunable, either in
.Xr loader.conf 5
-or via
+or by using
.Xr sysctl 8 .
-The following bits have the described effects:
-.Bl -tag -width 6n -offset indent
-.It 0x01
-Enable informational prints.
-.It 0x02
-Enable tracing prints.
-.It 0x04
-Enable prints for driver faults.
-.It 0x08
-Enable prints for controller events.
-.El
+These bits have the described effects:
+.Bd -literal -offset indent
+0x0001 Enable informational prints (set by default).
+0x0002 Enable prints for driver faults (set by default).
+0x0004 Enable prints for controller events.
+0x0008 Enable prints for controller logging.
+0x0010 Enable prints for tracing recovery operations.
+0x0020 Enable prints for parameter errors and programming bugs.
+0x0040 Enable prints for system initialization operations.
+0x0080 Enable prints for more detailed information.
+0x0100 Enable prints for user-generated commands (IOCTL).
+0x0200 Enable prints for device mapping.
+0x0400 Enable prints for tracing through driver functions.
+.Ed
.Sh SEE ALSO
+.Xr cam 4 ,
.Xr cd 4 ,
.Xr ch 4 ,
.Xr da 4 ,
+.Xr mpr 4 ,
.Xr mpt 4 ,
.Xr pci 4 ,
.Xr sa 4 ,
@@ -238,24 +317,17 @@
.Sh HISTORY
The
.Nm
-driver first appeared in
-.Fx 9.0 .
+driver first appeared in FreeBSD 9.3.
.Sh AUTHORS
-.An -nosplit
The
.Nm
driver was originally written by
+.An -nosplit
.An Scott Long Aq Mt scottl@FreeBSD.org .
-It has been improved and tested by LSI Logic Corporation.
+It has been improved and tested by LSI Corporation,
+Avago Technologies (formally LSI), and Broadcom Ltd. (formally Avago).
+.Pp
This man page was written by
-.An Ken Merry Aq Mt ken@FreeBSD.org .
-.Sh BUGS
-This driver has a couple of known shortcomings:
-.Bl -bullet -compact
-.It
-No userland utility available (e.g.,
-.Xr mptutil 8 ) .
-.It
-The driver probes devices sequentially.
-If your system has a large number of devices, the probe will take a while.
-.El
+.An Ken Merry Aq Mt ken@FreeBSD.org
+with additional input from
+.An Stephen McConnell Aq Mt slm@FreeBSD.org .
Index: sys/dev/mpr/mpr.c
===================================================================
--- sys/dev/mpr/mpr.c
+++ sys/dev/mpr/mpr.c
@@ -1373,6 +1373,7 @@
sc->disable_msix = 0;
sc->disable_msi = 0;
sc->max_chains = MPR_CHAIN_FRAMES;
+ sc->max_io_pages = MPR_MAXIO_PAGES;
sc->enable_ssu = MPR_SSU_ENABLE_SSD_DISABLE_HDD;
sc->spinup_wait_time = DEFAULT_SPINUP_WAIT;
@@ -1383,6 +1384,7 @@
TUNABLE_INT_FETCH("hw.mpr.disable_msix", &sc->disable_msix);
TUNABLE_INT_FETCH("hw.mpr.disable_msi", &sc->disable_msi);
TUNABLE_INT_FETCH("hw.mpr.max_chains", &sc->max_chains);
+ TUNABLE_INT_FETCH("hw.mpr.max_io_pages", &sc->max_io_pages);
TUNABLE_INT_FETCH("hw.mpr.enable_ssu", &sc->enable_ssu);
TUNABLE_INT_FETCH("hw.mpr.spinup_wait_time", &sc->spinup_wait_time);
@@ -1403,6 +1405,10 @@
device_get_unit(sc->mpr_dev));
TUNABLE_INT_FETCH(tmpstr, &sc->max_chains);
+ snprintf(tmpstr, sizeof(tmpstr), "dev.mpr.%d.max_io_pages",
+ device_get_unit(sc->mpr_dev));
+ TUNABLE_INT_FETCH(tmpstr, &sc->max_io_pages);
+
bzero(sc->exclude_ids, sizeof(sc->exclude_ids));
snprintf(tmpstr, sizeof(tmpstr), "dev.mpr.%d.exclude_ids",
device_get_unit(sc->mpr_dev));
@@ -1488,6 +1494,11 @@
&sc->max_chains, 0,"maximum chain frames that will be allocated");
SYSCTL_ADD_INT(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree),
+ OID_AUTO, "max_io_pages", CTLFLAG_RD,
+ &sc->max_io_pages, 0,"maximum pages to allow per I/O (if <1 use "
+ "IOCFacts)");
+
+ SYSCTL_ADD_INT(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree),
OID_AUTO, "enable_ssu", CTLFLAG_RW, &sc->enable_ssu, 0,
"enable SSU to SATA SSD/HDD at shutdown");
Index: sys/dev/mpr/mpr_sas.c
===================================================================
--- sys/dev/mpr/mpr_sas.c
+++ sys/dev/mpr/mpr_sas.c
@@ -971,6 +971,8 @@
case XPT_PATH_INQ:
{
struct ccb_pathinq *cpi = &ccb->cpi;
+ struct mpr_softc *sc = sassc->sc;
+ uint8_t sges_per_frame;
cpi->version_num = 1;
cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE|PI_WIDE_16;
@@ -999,13 +1001,23 @@
cpi->transport_version = 0;
cpi->protocol = PROTO_SCSI;
cpi->protocol_version = SCSI_REV_SPC;
-#if __FreeBSD_version >= 800001
+
/*
- * XXXSLM-probably need to base this number on max SGL's and
- * page size.
- */
- cpi->maxio = 256 * 1024;
-#endif
+ * Max IO Size is Page Size * the following:
+ * ((SGEs per frame - 1 for chain element) *
+ * Max Chain Depth) + 1 for no chain needed in last frame
+ *
+ * If user suggests a Max IO size to use, use the smaller of the
+ * user's value and the calculated value as long as the user's
+ * value is larger than 0. The user's value is in pages.
+ */
+ sges_per_frame = (sc->chain_frame_size /
+ sizeof(MPI2_IEEE_SGE_SIMPLE64)) - 1;
+ cpi->maxio = (sges_per_frame * sc->facts->MaxChainDepth) + 1;
+ cpi->maxio *= PAGE_SIZE;
+ if ((sc->max_io_pages > 0) && (sc->max_io_pages * PAGE_SIZE <
+ cpi->maxio))
+ cpi->maxio = sc->max_io_pages * PAGE_SIZE;
mprsas_set_ccbstatus(ccb, CAM_REQ_CMP);
break;
}
Index: sys/dev/mpr/mprvar.h
===================================================================
--- sys/dev/mpr/mprvar.h
+++ sys/dev/mpr/mprvar.h
@@ -33,7 +33,7 @@
#ifndef _MPRVAR_H
#define _MPRVAR_H
-#define MPR_DRIVER_VERSION "13.00.00.00-fbsd"
+#define MPR_DRIVER_VERSION "13.01.00.00-fbsd"
#define MPR_DB_MAX_WAIT 2500
@@ -41,6 +41,7 @@
#define MPR_EVT_REPLY_FRAMES 32
#define MPR_REPLY_FRAMES MPR_REQ_FRAMES
#define MPR_CHAIN_FRAMES 2048
+#define MPR_MAXIO_PAGES (-1)
#define MPR_SENSE_LEN SSD_FULL_SIZE
#define MPR_MSI_COUNT 1
#define MPR_SGE64_SIZE 12
@@ -264,6 +265,7 @@
int io_cmds_highwater;
int chain_free;
int max_chains;
+ int max_io_pages;
int chain_free_lowwater;
uint32_t chain_frame_size;
uint16_t chain_seg_size;
Index: sys/dev/mps/mps.c
===================================================================
--- sys/dev/mps/mps.c
+++ sys/dev/mps/mps.c
@@ -1350,6 +1350,7 @@
sc->disable_msix = 0;
sc->disable_msi = 0;
sc->max_chains = MPS_CHAIN_FRAMES;
+ sc->max_io_pages = MPS_MAXIO_PAGES;
sc->enable_ssu = MPS_SSU_ENABLE_SSD_DISABLE_HDD;
sc->spinup_wait_time = DEFAULT_SPINUP_WAIT;
@@ -1360,6 +1361,7 @@
TUNABLE_INT_FETCH("hw.mps.disable_msix", &sc->disable_msix);
TUNABLE_INT_FETCH("hw.mps.disable_msi", &sc->disable_msi);
TUNABLE_INT_FETCH("hw.mps.max_chains", &sc->max_chains);
+ TUNABLE_INT_FETCH("hw.mps.max_io_pages", &sc->max_io_pages);
TUNABLE_INT_FETCH("hw.mps.enable_ssu", &sc->enable_ssu);
TUNABLE_INT_FETCH("hw.mps.spinup_wait_time", &sc->spinup_wait_time);
@@ -1380,6 +1382,10 @@
device_get_unit(sc->mps_dev));
TUNABLE_INT_FETCH(tmpstr, &sc->max_chains);
+ snprintf(tmpstr, sizeof(tmpstr), "dev.mps.%d.max_io_pages",
+ device_get_unit(sc->mps_dev));
+ TUNABLE_INT_FETCH(tmpstr, &sc->max_io_pages);
+
bzero(sc->exclude_ids, sizeof(sc->exclude_ids));
snprintf(tmpstr, sizeof(tmpstr), "dev.mps.%d.exclude_ids",
device_get_unit(sc->mps_dev));
@@ -1465,6 +1471,11 @@
&sc->max_chains, 0,"maximum chain frames that will be allocated");
SYSCTL_ADD_INT(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree),
+ OID_AUTO, "max_io_pages", CTLFLAG_RD,
+ &sc->max_io_pages, 0,"maximum pages to allow per I/O (if <1 use "
+ "IOCFacts)");
+
+ SYSCTL_ADD_INT(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree),
OID_AUTO, "enable_ssu", CTLFLAG_RW, &sc->enable_ssu, 0,
"enable SSU to SATA SSD/HDD at shutdown");
Index: sys/dev/mps/mps_sas.c
===================================================================
--- sys/dev/mps/mps_sas.c
+++ sys/dev/mps/mps_sas.c
@@ -928,6 +928,8 @@
case XPT_PATH_INQ:
{
struct ccb_pathinq *cpi = &ccb->cpi;
+ struct mps_softc *sc = sassc->sc;
+ uint8_t sges_per_frame;
cpi->version_num = 1;
cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE|PI_WIDE_16;
@@ -951,12 +953,23 @@
cpi->transport_version = 0;
cpi->protocol = PROTO_SCSI;
cpi->protocol_version = SCSI_REV_SPC;
-#if __FreeBSD_version >= 800001
+
/*
- * XXX KDM where does this number come from?
- */
- cpi->maxio = 256 * 1024;
-#endif
+ * Max IO Size is Page Size * the following:
+ * ((SGEs per frame - 1 for chain element) *
+ * Max Chain Depth) + 1 for no chain needed in last frame
+ *
+ * If user suggests a Max IO size to use, use the smaller of the
+ * user's value and the calculated value as long as the user's
+ * value is larger than 0. The user's value is in pages.
+ */
+ sges_per_frame = ((sc->facts->IOCRequestFrameSize * 4) /
+ sizeof(MPI2_SGE_SIMPLE64)) - 1;
+ cpi->maxio = (sges_per_frame * sc->facts->MaxChainDepth) + 1;
+ cpi->maxio *= PAGE_SIZE;
+ if ((sc->max_io_pages > 0) && (sc->max_io_pages * PAGE_SIZE <
+ cpi->maxio))
+ cpi->maxio = sc->max_io_pages * PAGE_SIZE;
mpssas_set_ccbstatus(ccb, CAM_REQ_CMP);
break;
}
Index: sys/dev/mps/mpsvar.h
===================================================================
--- sys/dev/mps/mpsvar.h
+++ sys/dev/mps/mpsvar.h
@@ -33,7 +33,7 @@
#ifndef _MPSVAR_H
#define _MPSVAR_H
-#define MPS_DRIVER_VERSION "21.00.00.00-fbsd"
+#define MPS_DRIVER_VERSION "21.01.00.00-fbsd"
#define MPS_DB_MAX_WAIT 2500
@@ -41,6 +41,7 @@
#define MPS_EVT_REPLY_FRAMES 32
#define MPS_REPLY_FRAMES MPS_REQ_FRAMES
#define MPS_CHAIN_FRAMES 2048
+#define MPS_MAXIO_PAGES (-1)
#define MPS_SENSE_LEN SSD_FULL_SIZE
#define MPS_MSI_COUNT 1
#define MPS_SGE64_SIZE 12
@@ -280,6 +281,7 @@
int io_cmds_highwater;
int chain_free;
int max_chains;
+ int max_io_pages;
int chain_free_lowwater;
u_int enable_ssu;
int spinup_wait_time;

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