diff --git a/module/zfs/zfs_ioctl.c b/module/zfs/zfs_ioctl.c
index 46b461c917..91e35d8217 100644
--- a/module/zfs/zfs_ioctl.c
+++ b/module/zfs/zfs_ioctl.c
@@ -161,7 +161,7 @@ history_str_get(zfs_cmd_t *zc)
 	if (zc->zc_history == 0)
 		return (NULL);
 
-	buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP);
+	buf = kmem_alloc(HIS_MAX_RECORD_LEN, KM_SLEEP | KM_NODEBUG);
 	if (copyinstr((void *)(uintptr_t)zc->zc_history,
 	    buf, HIS_MAX_RECORD_LEN, NULL) != 0) {
 		history_str_free(buf);
@@ -974,7 +974,7 @@ put_nvlist(zfs_cmd_t *zc, nvlist_t *nvl)
 	if (size > zc->zc_nvlist_dst_size) {
 		error = ENOMEM;
 	} else {
-		packed = kmem_alloc(size, KM_SLEEP);
+		packed = kmem_alloc(size, KM_SLEEP | KM_NODEBUG);
 		VERIFY(nvlist_pack(nvl, &packed, &size, NV_ENCODE_NATIVE,
 		    KM_SLEEP) == 0);
 		if (ddi_copyout(packed, (void *)(uintptr_t)zc->zc_nvlist_dst,
@@ -4556,7 +4556,7 @@ zfs_ioctl(struct file *filp, unsigned cmd, unsigned long arg)
 	if (vec >= sizeof (zfs_ioc_vec) / sizeof (zfs_ioc_vec[0]))
 		return (-EINVAL);
 
-	zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
+	zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP | KM_NODEBUG);
 
 	error = ddi_copyin((void *)arg, zc, sizeof (zfs_cmd_t), flag);
 	if (error != 0)
diff --git a/module/zfs/zil.c b/module/zfs/zil.c
index 7c04debd78..8ca848cfc6 100644
--- a/module/zfs/zil.c
+++ b/module/zfs/zil.c
@@ -1040,7 +1040,7 @@ zil_itx_create(uint64_t txtype, size_t lrsize)
 
 	lrsize = P2ROUNDUP_TYPED(lrsize, sizeof (uint64_t), size_t);
 
-	itx = kmem_alloc(offsetof(itx_t, itx_lr) + lrsize, KM_SLEEP);
+	itx = kmem_alloc(offsetof(itx_t, itx_lr) + lrsize, KM_SLEEP|KM_NODEBUG);
 	itx->itx_lr.lrc_txtype = txtype;
 	itx->itx_lr.lrc_reclen = lrsize;
 	itx->itx_sod = lrsize; /* if write & WR_NEED_COPY will be increased */
@@ -1708,7 +1708,7 @@ zil_replay(objset_t *os, void *arg, zil_replay_func_t *replay_func[TX_MAX_TYPE])
 	zr.zr_replay = replay_func;
 	zr.zr_arg = arg;
 	zr.zr_byteswap = BP_SHOULD_BYTESWAP(&zh->zh_log);
-	zr.zr_lr = kmem_alloc(2 * SPA_MAXBLOCKSIZE, KM_SLEEP);
+	zr.zr_lr = vmem_alloc(2 * SPA_MAXBLOCKSIZE, KM_SLEEP);
 
 	/*
 	 * Wait for in-progress removes to sync before starting replay.
@@ -1720,7 +1720,7 @@ zil_replay(objset_t *os, void *arg, zil_replay_func_t *replay_func[TX_MAX_TYPE])
 	ASSERT(zilog->zl_replay_blks == 0);
 	(void) zil_parse(zilog, zil_incr_blks, zil_replay_log_record, &zr,
 	    zh->zh_claim_txg);
-	kmem_free(zr.zr_lr, 2 * SPA_MAXBLOCKSIZE);
+	vmem_free(zr.zr_lr, 2 * SPA_MAXBLOCKSIZE);
 
 	zil_destroy(zilog, B_FALSE);
 	txg_wait_synced(zilog->zl_dmu_pool, zilog->zl_destroy_txg);