From 99e755d653aec351c43a636b5734d1de3476d233 Mon Sep 17 00:00:00 2001
From: DeHackEd <DeHackEd@users.noreply.github.com>
Date: Mon, 5 Aug 2019 14:35:47 -0400
Subject: [PATCH] Don't wakeup unnecessarily in 'zpool events -f'

ZED can prevent CPU's from properly sleeping.

Rather than periodically waking up in the zevents code, just go to sleep and wait for a wakeup.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: DHE <git@dehacked.net>
Closes #9091
---
 module/zfs/fm.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/module/zfs/fm.c b/module/zfs/fm.c
index cc5225dcb..0a0fc79bd 100644
--- a/module/zfs/fm.c
+++ b/module/zfs/fm.c
@@ -683,8 +683,7 @@ zfs_zevent_wait(zfs_zevent_t *ze)
 			break;
 		}
 
-		error = cv_timedwait_sig(&zevent_cv, &zevent_lock,
-		    ddi_get_lbolt() + MSEC_TO_TICK(10));
+		error = cv_wait_sig(&zevent_cv, &zevent_lock);
 		if (signal_pending(current)) {
 			error = SET_ERROR(EINTR);
 			break;
-- 
2.40.0