diff options
| author | Christian Brauner <brauner@kernel.org> | 2024-10-21 13:54:46 +0200 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2024-10-30 09:58:02 +0100 |
| commit | aab154a442f9ba2a08fc130dbc8d178a33e10345 (patch) | |
| tree | 391d7f413919f98ce716690d5556afb0c024ee5d /tools/testing/selftests/filesystems/Makefile | |
| parent | 2ec67bb4f9c08000982d6aa0e72511bcc83caeb6 (diff) | |
selftests: add file SLAB_TYPESAFE_BY_RCU recycling stressor
Add a simple file stressor that lives directly in-tree. This will create
a bunch of processes that each open 500 file descriptors and then use
close_range() to close them all.
Concurrently, other processes read /proc/<pid>/fd/ which rougly does
f = fget_task_next(p, &fd);
if (!f)
break;
data.mode = f->f_mode;
fput(f);
Which means that it'll try to get a reference to a file in another
task's file descriptor table.
Under heavy file load it is increasingly likely that the other task will
manage to close @file and @file will be recycled due to
SLAB_TYPEAFE_BY_RCU concurrently. This will trigger various warnings in
the file reference counting code.
Link: https://lore.kernel.org/r/20241021-vergab-streuen-924df15dceb9@brauner
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'tools/testing/selftests/filesystems/Makefile')
| -rw-r--r-- | tools/testing/selftests/filesystems/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/testing/selftests/filesystems/Makefile b/tools/testing/selftests/filesystems/Makefile index c647fd6a0446..66305fc34c60 100644 --- a/tools/testing/selftests/filesystems/Makefile +++ b/tools/testing/selftests/filesystems/Makefile @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 CFLAGS += $(KHDR_INCLUDES) -TEST_GEN_PROGS := devpts_pts +TEST_GEN_PROGS := devpts_pts file_stressor TEST_GEN_PROGS_EXTENDED := dnotify_test include ../lib.mk |