mirror_zfs/lib/libspl/include/sys/time.h
Brian Behlendorf c30e716c81 Fix MMP write frequency for large pools
When a single pool contains more vdevs than the CONFIG_HZ for
for the kernel the mmp thread will not delay properly.  Switch
to using cv_timedwait_sig_hires() to handle higher resolution
delays.

This issue was reported on Arch Linux where HZ defaults to only
100 and this could be fairly easily reproduced with a reasonably
large pool.  Most distribution kernels set CONFIG_HZ=250 or
CONFIG_HZ=1000 and thus are unlikely to be impacted.

Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Reviewed-by: Olaf Faaland <faaland1@llnl.gov>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #7205
Closes #7289
2018-03-14 16:10:38 -07:00

83 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, Version 1.0 only
* (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.
*
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* 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]
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* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _LIBSPL_SYS_TIME_H
#define _LIBSPL_SYS_TIME_H
#include_next <sys/time.h>
#include <sys/types.h>
#ifndef SEC
#define SEC 1
#endif
#ifndef MILLISEC
#define MILLISEC 1000
#endif
#ifndef MICROSEC
#define MICROSEC 1000000
#endif
#ifndef NANOSEC
#define NANOSEC 1000000000
#endif
#ifndef NSEC_PER_USEC
#define NSEC_PER_USEC 1000L
#endif
#ifndef MSEC2NSEC
#define MSEC2NSEC(m) ((hrtime_t)(m) * (NANOSEC / MILLISEC))
#endif
#ifndef NSEC2MSEC
#define NSEC2MSEC(n) ((n) / (NANOSEC / MILLISEC))
#endif
#ifndef USEC2NSEC
#define USEC2NSEC(m) ((hrtime_t)(m) * (NANOSEC / MICROSEC))
#endif
#ifndef NSEC2SEC
#define NSEC2SEC(n) ((n) / (NANOSEC / SEC))
#endif
#ifndef SEC2NSEC
#define SEC2NSEC(m) ((hrtime_t)(m) * (NANOSEC / SEC))
#endif
typedef long long hrtime_t;
typedef struct timespec timestruc_t;
typedef struct timespec timespec_t;
extern hrtime_t gethrtime(void);
extern void gethrestime(timestruc_t *);
#endif /* _LIBSPL_SYS_TIME_H */