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4e21fd060a
This change introduces a new weighting algorithm to improve metaslab selection. The new weighting algorithm relies on the SPACEMAP_HISTOGRAM feature. As a result, the metaslab weight now encodes the type of weighting algorithm used (size-based vs segment-based). Porting Notes: The metaslab allocation tracing code is conditionally removed on linux (dependent on mdb debugger). Authored by: George Wilson <george.wilson@delphix.com> Reviewed by: Alex Reece <alex@delphix.com> Reviewed by: Chris Siden <christopher.siden@delphix.com> Reviewed by: Dan Kimmel <dan.kimmel@delphix.com> Reviewed by: Matthew Ahrens <mahrens@delphix.com> Reviewed by: Paul Dagnelie <paul.dagnelie@delphix.com> Reviewed by: Pavel Zakharov pavel.zakharov@delphix.com Reviewed by: Prakash Surya <prakash.surya@delphix.com> Reviewed by: Don Brady <don.brady@intel.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Ported-by: Don Brady <don.brady@intel.com> OpenZFS-issue: https://www.illumos.org/issues/7303 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/d5190931bd Closes #5404
83 lines
2.2 KiB
C
83 lines
2.2 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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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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#define ZFS_DEBUG_METASLAB_VERIFY (1 << 8)
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extern void __dprintf(const char *file, const char *func,
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int line, const char *fmt, ...);
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#define dprintf(...) \
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__dprintf(__FILE__, __func__, __LINE__, __VA_ARGS__)
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#define zfs_dbgmsg(...) \
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__dprintf(__FILE__, __func__, __LINE__, __VA_ARGS__)
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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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int zdm_size;
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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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#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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