diff --git a/sdb/commands/echo.py b/sdb/commands/echo.py
index 4ea869d..06ffead 100644
--- a/sdb/commands/echo.py
+++ b/sdb/commands/echo.py
@@ -39,7 +39,7 @@ def _init_parser(cls, name: str) -> argparse.ArgumentParser:
 
     def _call(self, objs: Iterable[drgn.Object]) -> Iterable[drgn.Object]:
         for obj in objs:
-            yield obj
+            yield from obj
 
         for addr in self.args.addrs:
             try:
diff --git a/sdb/commands/linux/internal/slub_helpers.py b/sdb/commands/linux/internal/slub_helpers.py
index 127dc45..55b93d1 100644
--- a/sdb/commands/linux/internal/slub_helpers.py
+++ b/sdb/commands/linux/internal/slub_helpers.py
@@ -151,7 +151,7 @@ def util(cache: drgn.Object) -> int:
 
 def lookup_cache_by_address(obj: drgn.Object) -> Optional[drgn.Object]:
     try:
-        cache = find_containing_slab_cache(obj)
+        cache = find_containing_slab_cache(prog=sdb.get_prog(), addr=obj)
         if cache.value_() == 0x0:
             return None
         return cache
diff --git a/sdb/commands/linux/process.py b/sdb/commands/linux/process.py
index 5257acd..a0ccfb7 100644
--- a/sdb/commands/linux/process.py
+++ b/sdb/commands/linux/process.py
@@ -58,7 +58,7 @@ def _init_parser(cls, name: str) -> argparse.ArgumentParser:
 
     def _call(self, objs: Iterable[drgn.Object]) -> Iterable[drgn.Object]:
         for pid in self.args.pid:
-            yield find_pid(sdb.get_prog(), pid)
+            yield find_pid(prog=sdb.get_prog(), ns=sdb.get_prog(), pid=pid)
 
 
 class FindTask(sdb.Command):
@@ -90,4 +90,4 @@ def _init_parser(cls, name: str) -> argparse.ArgumentParser:
 
     def _call(self, objs: Iterable[drgn.Object]) -> Iterable[drgn.Object]:
         for pid in self.args.pid:
-            yield find_task(sdb.get_prog(), pid)
+            yield find_task(prog=sdb.get_prog(), ns=sdb.get_prog(), pid=pid)
diff --git a/sdb/commands/linux/stacks.py b/sdb/commands/linux/stacks.py
index 8de3ba3..d24a578 100644
--- a/sdb/commands/linux/stacks.py
+++ b/sdb/commands/linux/stacks.py
@@ -400,7 +400,7 @@ def pretty_print(self, objs: Iterable[drgn.Object]) -> None:
 
     def no_input(self) -> Iterable[drgn.Object]:
         self.validate_context()
-        yield from filter(self.match_stack, for_each_task(sdb.get_prog()))
+        yield from filter(self.match_stack, for_each_task(prog=sdb.get_prog(), ns=sdb.get_prog()))
 
 
 class KernelCrashedThread(sdb.Locator, sdb.PrettyPrinter):
diff --git a/sdb/commands/linux/threads.py b/sdb/commands/linux/threads.py
index 96cceba..b2e1fcd 100644
--- a/sdb/commands/linux/threads.py
+++ b/sdb/commands/linux/threads.py
@@ -97,4 +97,4 @@ def pretty_print(self, objs: Iterable[drgn.Object]) -> None:
         table.print_()
 
     def no_input(self) -> Iterable[drgn.Object]:
-        yield from for_each_task(sdb.get_prog())
+        yield from for_each_task(prog=sdb.get_prog(), ns=sdb.get_prog())
diff --git a/sdb/commands/tail.py b/sdb/commands/tail.py
index d6663d0..60aed13 100644
--- a/sdb/commands/tail.py
+++ b/sdb/commands/tail.py
@@ -49,4 +49,4 @@ def _call(self, objs: Iterable[drgn.Object]) -> Iterable[drgn.Object]:
         for obj in objs:
             queue.append(obj)
         for obj in queue:
-            yield obj
+            yield from obj
diff --git a/sdb/commands/zfs/histograms.py b/sdb/commands/zfs/histograms.py
index fba410a..723fae5 100644
--- a/sdb/commands/zfs/histograms.py
+++ b/sdb/commands/zfs/histograms.py
@@ -130,8 +130,7 @@ def print_histogram(hist: drgn.Object,
                 min_bucket = bucket
             if bucket > max_bucket and count > 0:
                 max_bucket = bucket
-            if count > max_count:
-                max_count = count
+            max_count = max(max_count, count)
 
         HISTOGRAM_WIDTH_MAX = 40
         max_count = max(max_count, HISTOGRAM_WIDTH_MAX)