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annotate usr/src/uts/intel/zfs/spa_boot.c @ 13869:921a99998bb4

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3246 ZFS I/O deadman thread Reviewed by: Matt Ahrens <matthew.ahrens@delphix.com> Reviewed by: Eric Schrock <eric.schrock@delphix.com> Reviewed by: Christopher Siden <chris.siden@delphix.com> Approved by: Garrett D'Amore <garrett@damore.org>
author George.Wilson <george.wilson@delphix.com>
date Mon, 29 Oct 2012 12:08:09 -0500
parents e2081f502306
children
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1 /*
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2 * CDDL HEADER START
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3 *
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4 * The contents of this file are subject to the terms of the
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5 * Common Development and Distribution License (the "License").
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6 * You may not use this file except in compliance with the License.
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7 *
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8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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9 * or http://www.opensolaris.org/os/licensing.
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10 * See the License for the specific language governing permissions
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11 * and limitations under the License.
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12 *
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13 * When distributing Covered Code, include this CDDL HEADER in each
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14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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15 * If applicable, add the following below this CDDL HEADER, with the
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16 * fields enclosed by brackets "[]" replaced with your own identifying
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17 * information: Portions Copyright [yyyy] [name of copyright owner]
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18 *
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19 * CDDL HEADER END
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20 */
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21
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22 /*
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23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
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24 * Use is subject to license terms.
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25 */
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26
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27 /*
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28 * Copyright (c) 2012 by Delphix. All rights reserved.
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29 */
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30
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31 #include <sys/zio.h>
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32 #include <sys/spa.h>
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33 #include <sys/sunddi.h>
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34 #include <sys/x86_archext.h>
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35
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36 extern int zfs_deadman_enabled;
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37
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38 char *
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39 spa_get_bootprop(char *propname)
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40 {
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41 char *value;
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42
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43 if (ddi_prop_lookup_string(DDI_DEV_T_ANY, ddi_root_node(),
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44 DDI_PROP_DONTPASS, propname, &value) != DDI_SUCCESS)
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45 return (NULL);
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46 return (value);
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47 }
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48
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49 void
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50 spa_free_bootprop(char *value)
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51 {
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52 ddi_prop_free(value);
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53 }
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54
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55 void
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56 spa_arch_init(void)
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57 {
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58 /*
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59 * Configure the default settings for the zfs deadman unless
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60 * overriden by /etc/system.
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61 */
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62 if (zfs_deadman_enabled == -1) {
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63 /*
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64 * Disable the zfs deadman logic on VMware deployments.
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65 */
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66 if (get_hwenv() == HW_VMWARE)
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67 zfs_deadman_enabled = 0;
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68 else
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69 zfs_deadman_enabled = 1;
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70 }
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71 }