From 6f17052743b7971b7e8609f0d111b61239e443de Mon Sep 17 00:00:00 2001
From: Ameer Hamza <ahamza@ixsystems.com>
Date: Thu, 22 Jan 2026 01:36:03 +0500
Subject: [PATCH] cache_012_pos: disable compression to ensure L2ARC wrap

Reviewed-by: Alexander Motin <alexander.motin@TrueNAS.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ameer Hamza <ahamza@ixsystems.com>
Closes #18093
---
 tests/zfs-tests/tests/functional/cache/cache_012_pos.ksh | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tests/zfs-tests/tests/functional/cache/cache_012_pos.ksh b/tests/zfs-tests/tests/functional/cache/cache_012_pos.ksh
index 877cbe5ed..551847a6e 100755
--- a/tests/zfs-tests/tests/functional/cache/cache_012_pos.ksh
+++ b/tests/zfs-tests/tests/functional/cache/cache_012_pos.ksh
@@ -91,6 +91,8 @@ log_must zpool create -f $TESTPOOL $VDEV cache $VCACHE
 
 # Actually, this test relies on atime writes to force the L2 ARC discards
 log_must zfs set relatime=off $TESTPOOL
+# Disable compression to ensure predictable L2ARC fill
+log_must zfs set compression=off $TESTPOOL
 
 log_must fio $FIO_SCRIPTS/mkfiles.fio
 log_must fio $FIO_SCRIPTS/random_reads.fio