From: Christian Brauner <brauner@kernel.org>
To: linux-fsdevel@vger.kernel.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org,
Alexander Viro <viro@zeniv.linux.org.uk>,
Jens Axboe <axboe@kernel.dk>, Jan Kara <jack@suse.cz>,
Tejun Heo <tj@kernel.org>, Jann Horn <jannh@google.com>,
Christian Brauner <brauner@kernel.org>
Subject: [PATCH RFC v3 25/26] fs: stop rewriting kthread fs structs
Date: Wed, 11 Mar 2026 22:44:08 +0100 [thread overview]
Message-ID: <20260311-work-kthread-nullfs-v3-25-3dd2cbe92ad0@kernel.org> (raw)
In-Reply-To: <20260311-work-kthread-nullfs-v3-0-3dd2cbe92ad0@kernel.org>
Now that we isolated kthreads filesystem state completely from userspace
stop rewriting their state.
Signed-off-by: Christian Brauner <brauner@kernel.org>
---
fs/fs_struct.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/fs/fs_struct.c b/fs/fs_struct.c
index f44e43ce6d93..2a98cfbedd32 100644
--- a/fs/fs_struct.c
+++ b/fs/fs_struct.c
@@ -61,6 +61,10 @@ void chroot_fs_refs(const struct path *old_root, const struct path *new_root)
read_lock(&tasklist_lock);
for_each_process_thread(g, p) {
+ /* leave kthreads alone */
+ if (p->flags & PF_KTHREAD)
+ continue;
+
task_lock(p);
fs = p->real_fs;
if (fs) {
--
2.47.3
next prev parent reply other threads:[~2026-03-11 21:57 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-11 21:43 [PATCH RFC v3 00/26] fs,kthread: start all kthreads in nullfs Christian Brauner
2026-03-11 21:43 ` [PATCH RFC v3 01/26] fs: add switch_fs_struct() Christian Brauner
2026-03-11 21:43 ` [PATCH RFC v3 02/26] fs: notice when init abandons fs sharing Christian Brauner
2026-03-11 21:43 ` [PATCH RFC v3 03/26] fs: add scoped_with_init_fs() Christian Brauner
2026-03-11 21:43 ` [PATCH RFC v3 04/26] fs: add real_fs to track task's actual fs_struct Christian Brauner
2026-03-11 21:43 ` [PATCH RFC v3 05/26] fs: make userspace_init_fs a dynamically-initialized pointer Christian Brauner
2026-03-11 21:43 ` [PATCH RFC v3 06/26] rnbd: use scoped_with_init_fs() for block device open Christian Brauner
2026-03-11 21:43 ` [PATCH RFC v3 07/26] crypto: ccp: use scoped_with_init_fs() for SEV file access Christian Brauner
2026-03-11 21:43 ` [PATCH RFC v3 08/26] scsi: target: use scoped_with_init_fs() for ALUA metadata Christian Brauner
2026-03-11 21:43 ` [PATCH RFC v3 09/26] scsi: target: use scoped_with_init_fs() for APTPL metadata Christian Brauner
2026-03-11 21:43 ` [PATCH RFC v3 10/26] btrfs: use scoped_with_init_fs() for update_dev_time() Christian Brauner
2026-03-11 21:43 ` [PATCH RFC v3 11/26] coredump: use scoped_with_init_fs() for coredump path resolution Christian Brauner
2026-03-11 21:43 ` [PATCH RFC v3 12/26] fs: use scoped_with_init_fs() for kernel_read_file_from_path_initns() Christian Brauner
2026-03-11 21:43 ` [PATCH RFC v3 13/26] ksmbd: use scoped_with_init_fs() for share path resolution Christian Brauner
2026-03-11 21:43 ` [PATCH RFC v3 14/26] ksmbd: use scoped_with_init_fs() for filesystem info path lookup Christian Brauner
2026-03-11 21:43 ` [PATCH RFC v3 15/26] ksmbd: use scoped_with_init_fs() for VFS path operations Christian Brauner
2026-03-11 21:43 ` [PATCH RFC v3 16/26] pnfs/blocklayout: use scoped_with_init_fs() for SCSI device lookup Christian Brauner
2026-03-11 21:44 ` [PATCH RFC v3 17/26] initramfs: use scoped_with_init_fs() for rootfs unpacking Christian Brauner
2026-03-11 21:44 ` [PATCH RFC v3 18/26] af_unix: use scoped_with_init_fs() for coredump socket lookup Christian Brauner
2026-03-11 21:44 ` [PATCH RFC v3 19/26] fs: stop sharing fs_struct between init_task and pid 1 Christian Brauner
2026-03-11 21:44 ` [PATCH RFC v3 20/26] fs: add umh argument to struct kernel_clone_args Christian Brauner
2026-03-11 21:44 ` [PATCH RFC v3 21/26] fs: add kthread_mntns() Christian Brauner
2026-03-11 22:13 ` Thomas Weißschuh
2026-03-11 21:44 ` [PATCH RFC v3 22/26] devtmpfs: create private mount namespace Christian Brauner
2026-03-11 21:44 ` [PATCH RFC v3 23/26] nullfs: make nullfs multi-instance Christian Brauner
2026-03-11 21:44 ` [PATCH RFC v3 24/26] fs: start all kthreads in nullfs Christian Brauner
2026-03-11 21:44 ` Christian Brauner [this message]
2026-03-11 21:44 ` [PATCH RFC v3 26/26] fs: stop rewriting paths for PF_EXITING | PF_DUMPCORE Christian Brauner
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