From 63fd3c6cfd264cab94dc186fe8cceecac8bc0d50 Mon Sep 17 00:00:00 2001
From: Adam Leventhal <ahl@delphix.com>
Date: Wed, 28 Aug 2013 16:05:48 -0700
Subject: Illumos #3582, #3584

3582 zfs_delay() should support a variable resolution
3584 DTrace sdt probes for ZFS txg states

Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: Dan McDonald <danmcd@nexenta.com>
Reviewed by: Richard Elling <richard.elling@dey-sys.com>
Approved by: Garrett D'Amore <garrett@damore.org>

References:
    https://www.illumos.org/issues/3582
    illumos/illumos-gate@0689f76

Ported by: Ned Bass <bass6@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #1775
---
 lib/libzpool/kernel.c | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

(limited to 'lib/libzpool')

diff --git a/lib/libzpool/kernel.c b/lib/libzpool/kernel.c
index 2e5eef69b..f994f8ee3 100644
--- a/lib/libzpool/kernel.c
+++ b/lib/libzpool/kernel.c
@@ -528,6 +528,41 @@ top:
 	return (1);
 }
 
+/*ARGSUSED*/
+clock_t
+cv_timedwait_hires(kcondvar_t *cv, kmutex_t *mp, hrtime_t tim, hrtime_t res,
+    int flag)
+{
+	int error;
+	timestruc_t ts;
+	hrtime_t delta;
+
+	ASSERT(flag == 0);
+
+top:
+	delta = tim - gethrtime();
+	if (delta <= 0)
+		return (-1);
+
+	ts.tv_sec = delta / NANOSEC;
+	ts.tv_nsec = delta % NANOSEC;
+
+	ASSERT(mutex_owner(mp) == curthread);
+	mp->m_owner = NULL;
+	error = pthread_cond_timedwait(&cv->cv, &mp->m_lock, &ts);
+	mp->m_owner = curthread;
+
+	if (error == ETIME)
+		return (-1);
+
+	if (error == EINTR)
+		goto top;
+
+	ASSERT(error == 0);
+
+	return (1);
+}
+
 void
 cv_signal(kcondvar_t *cv)
 {
-- 
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