7f60329a26
5987 zfs prefetch code needs work Reviewed by: Adam Leventhal <ahl@delphix.com> Reviewed by: George Wilson <george.wilson@delphix.com> Reviewed by: Paul Dagnelie <pcd@delphix.com> Approved by: Gordon Ross <gordon.ross@nexenta.com> References: https://www.illumos.org/issues/5987 zfs prefetch code needs work illumos/illumos-gate@cf6106c 5987 zfs prefetch code needs work Porting notes: - [module/zfs/dbuf.c] -5f6d0b6Handle block pointers with a corrupt logical size - [module/zfs/dmu_zfetch.c] -c65aa5bFix gcc missing parenthesis warnings -428870fUpdate core ZFS code from build 121 to build 141. -79c76d5Change KM_PUSHPAGE -> KM_SLEEP -b8d06fcSwitch KM_SLEEP to KM_PUSHPAGE - Account for ISO C90 - mixed declarations and code - warnings - Module parameters (new/changed): - Replaced zfetch_block_cap with zfetch_max_distance (Max bytes to prefetch per stream (default 8MB; 8 * 1024 * 1024)) - Preserved zfs_prefetch_disable as 'int' for consistency with existing Linux module options. - [include/sys/trace_arc.h] - Added new tracepoints - DEFINE_ARC_BUF_HDR_EVENT(zfs_arc__sync__wait__for__async); - DEFINE_ARC_BUF_HDR_EVENT(zfs_arc__demand__hit__predictive__prefetch); - [man/man5/zfs-module-parameters.5] - Updated man page Ported-by: kernelOfTruth kerneloftruth@gmail.com Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
/*
|
|
* CDDL HEADER START
|
|
*
|
|
* The contents of this file are subject to the terms of the
|
|
* Common Development and Distribution License (the "License").
|
|
* You may not use this file except in compliance with the License.
|
|
*
|
|
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
|
|
* or http://www.opensolaris.org/os/licensing.
|
|
* See the License for the specific language governing permissions
|
|
* and limitations under the License.
|
|
*
|
|
* When distributing Covered Code, include this CDDL HEADER in each
|
|
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
|
|
* If applicable, add the following below this CDDL HEADER, with the
|
|
* fields enclosed by brackets "[]" replaced with your own identifying
|
|
* information: Portions Copyright [yyyy] [name of copyright owner]
|
|
*
|
|
* CDDL HEADER END
|
|
*/
|
|
/*
|
|
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
|
|
* Use is subject to license terms.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 2014 by Delphix. All rights reserved.
|
|
*/
|
|
|
|
#ifndef _DMU_ZFETCH_H
|
|
#define _DMU_ZFETCH_H
|
|
|
|
#include <sys/zfs_context.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
extern unsigned long zfetch_array_rd_sz;
|
|
|
|
struct dnode; /* so we can reference dnode */
|
|
|
|
typedef struct zstream {
|
|
uint64_t zs_blkid; /* expect next access at this blkid */
|
|
uint64_t zs_pf_blkid; /* next block to prefetch */
|
|
kmutex_t zs_lock; /* protects stream */
|
|
hrtime_t zs_atime; /* time last prefetch issued */
|
|
list_node_t zs_node; /* link for zf_stream */
|
|
} zstream_t;
|
|
|
|
typedef struct zfetch {
|
|
krwlock_t zf_rwlock; /* protects zfetch structure */
|
|
list_t zf_stream; /* list of zstream_t's */
|
|
struct dnode *zf_dnode; /* dnode that owns this zfetch */
|
|
} zfetch_t;
|
|
|
|
void zfetch_init(void);
|
|
void zfetch_fini(void);
|
|
|
|
void dmu_zfetch_init(zfetch_t *, struct dnode *);
|
|
void dmu_zfetch_fini(zfetch_t *);
|
|
void dmu_zfetch(zfetch_t *, uint64_t, uint64_t);
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _DMU_ZFETCH_H */
|