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4976 zfs should only avoid writing to a failing non-redundant top-level vdev 4978 ztest fails in get_metaslab_refcount() 4979 extend free space histogram to device and pool 4980 metaslabs should have a fragmentation metric 4981 remove fragmented ops vector from block allocator 4982 space_map object should proactively upgrade when feature is enabled 4983 need to collect metaslab information via mdb 4984 device selection should use fragmentation metric Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Adam Leventhal <adam.leventhal@delphix.com> Reviewed by: Christopher Siden <christopher.siden@delphix.com> Approved by: Garrett D'Amore <garrett@damore.org> References: https://www.illumos.org/issues/4976 https://www.illumos.org/issues/4978 https://www.illumos.org/issues/4979 https://www.illumos.org/issues/4980 https://www.illumos.org/issues/4981 https://www.illumos.org/issues/4982 https://www.illumos.org/issues/4983 https://www.illumos.org/issues/4984 https://github.com/illumos/illumos-gate/commit/2e4c998 Notes: The "zdb -M" option has been re-tasked to display the new metaslab fragmentation metric and the new "zdb -I" option is used to control the maximum number of in-flight I/Os. The new fragmentation metric is derived from the space map histogram which has been rolled up to the vdev and pool level and is presented to the user via "zpool list". Add a number of module parameters related to the new metaslab weighting logic. Ported by: Tim Chase <tim@chase2k.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #2595
112 lines
3.0 KiB
C
112 lines
3.0 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2012, 2014 by Delphix. All rights reserved.
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*/
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#ifndef _SYS_ZFS_DEBUG_H
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#define _SYS_ZFS_DEBUG_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef TRUE
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#define TRUE 1
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#endif
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#ifndef FALSE
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#define FALSE 0
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#endif
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/*
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* ZFS debugging - Always enabled for user space builds.
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*/
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#if !defined(ZFS_DEBUG) && !defined(_KERNEL)
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#define ZFS_DEBUG
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#endif
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extern int zfs_flags;
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extern int zfs_recover;
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extern int zfs_free_leak_on_eio;
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#define ZFS_DEBUG_DPRINTF (1<<0)
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#define ZFS_DEBUG_DBUF_VERIFY (1<<1)
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#define ZFS_DEBUG_DNODE_VERIFY (1<<2)
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#define ZFS_DEBUG_SNAPNAMES (1<<3)
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#define ZFS_DEBUG_MODIFY (1<<4)
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#define ZFS_DEBUG_SPA (1<<5)
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#define ZFS_DEBUG_ZIO_FREE (1<<6)
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#define ZFS_DEBUG_HISTOGRAM_VERIFY (1<<7)
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/*
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* Always log zfs debug messages to the spl debug subsystem as SS_USER1.
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* When the SPL is configured with debugging enabled these messages will
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* appear in the internal spl debug log, otherwise they are a no-op.
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*/
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#if defined(_KERNEL)
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#include <spl-debug.h>
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#define dprintf(...) \
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if (zfs_flags & ZFS_DEBUG_DPRINTF) \
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__SDEBUG(NULL, SS_USER1, SD_DPRINTF, __VA_ARGS__)
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/*
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* When zfs is running is user space the debugging is always enabled.
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* The messages will be printed using the __dprintf() function and
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* filtered based on the zfs_flags variable.
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*/
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#else
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#define dprintf(...) \
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if (zfs_flags & ZFS_DEBUG_DPRINTF) \
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__dprintf(__FILE__, __func__, __LINE__, __VA_ARGS__)
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#endif /* _KERNEL */
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extern void zfs_panic_recover(const char *fmt, ...);
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typedef struct zfs_dbgmsg {
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list_node_t zdm_node;
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time_t zdm_timestamp;
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char zdm_msg[1]; /* variable length allocation */
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} zfs_dbgmsg_t;
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extern void zfs_dbgmsg_init(void);
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extern void zfs_dbgmsg_fini(void);
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#if defined(_KERNEL) && defined(__linux__)
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#define zfs_dbgmsg(...) dprintf(__VA_ARGS__)
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#else
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extern void zfs_dbgmsg(const char *fmt, ...);
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extern void zfs_dbgmsg_print(const char *tag);
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#endif
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#ifndef _KERNEL
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extern int dprintf_find_string(const char *string);
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_ZFS_DEBUG_H */
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