diff options
| author | Mateusz Guzik <mjguzik@gmail.com> | 2026-01-20 19:45:39 +0100 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2026-02-10 11:39:30 +0100 |
| commit | 87caaeef79950377b616f3ba2265a82742cb9583 (patch) | |
| tree | 3fbb4b2422a16c5eb727ad5db23bb1df39d64842 /kernel | |
| parent | 03aef0602f22f30aab0e42e7f3169b0a5920c461 (diff) | |
pidfs: implement ino allocation without the pidmap lock
This paves the way for scalable PID allocation later.
The 32 bit variant merely takes a spinlock for simplicity, the 64 bit
variant uses a scalable scheme.
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Link: https://patch.msgid.link/20260120184539.1480930-1-mjguzik@gmail.com
Co-developed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/pid.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/kernel/pid.c b/kernel/pid.c index 06356e40ac00..72c9372b84b8 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -198,6 +198,7 @@ struct pid *alloc_pid(struct pid_namespace *ns, pid_t *arg_set_tid, INIT_HLIST_HEAD(&pid->tasks[type]); init_waitqueue_head(&pid->wait_pidfd); INIT_HLIST_HEAD(&pid->inodes); + pidfs_prepare_pid(pid); /* * 2. perm check checkpoint_restore_ns_capable() @@ -314,8 +315,6 @@ struct pid *alloc_pid(struct pid_namespace *ns, pid_t *arg_set_tid, retval = -ENOMEM; if (unlikely(!(ns->pid_allocated & PIDNS_ADDING))) goto out_free; - pidfs_prepare_pid(pid); - for (upid = pid->numbers + ns->level; upid >= pid->numbers; --upid) { /* Make the PID visible to find_pid_ns. */ idr_replace(&upid->ns->idr, pid, upid->nr); |