The branch main has been updated by jhb:
URL:
https://cgit.FreeBSD.org/src/commit/?id=44d5f5ed1e959d8f2c22b6ee69c6a46a45ccdd8e
commit 44d5f5ed1e959d8f2c22b6ee69c6a46a45ccdd8e
Author: John Baldwin <j...@freebsd.org>
AuthorDate: 2025-03-10 17:32:23 +0000
Commit: John Baldwin <j...@freebsd.org>
CommitDate: 2025-03-10 17:32:23 +0000
new-bus: Add taskqueue_bus to process hot-plug device events
Use a system-wide taskqueue for hot-plug events. This avoids possibly
blocking unrelated events on the thread taskqueue without requiring
multiple driver-specific taskqueues.
Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D49268
---
sys/kern/subr_bus.c | 3 +++
sys/sys/taskqueue.h | 6 ++++++
2 files changed, 9 insertions(+)
diff --git a/sys/kern/subr_bus.c b/sys/kern/subr_bus.c
index 0422352bba51..38a8cab639e4 100644
--- a/sys/kern/subr_bus.c
+++ b/sys/kern/subr_bus.c
@@ -51,6 +51,7 @@
#include <sys/smp.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
+#include <sys/taskqueue.h>
#include <sys/bus.h>
#include <sys/cpuset.h>
#ifdef INTRNG
@@ -120,6 +121,8 @@ struct device_prop_elm {
LIST_ENTRY(device_prop_elm) link;
};
+TASKQUEUE_DEFINE_THREAD(bus);
+
static void device_destroy_props(device_t dev);
/**
diff --git a/sys/sys/taskqueue.h b/sys/sys/taskqueue.h
index 9757e1fce575..9da364a1a716 100644
--- a/sys/sys/taskqueue.h
+++ b/sys/sys/taskqueue.h
@@ -215,4 +215,10 @@ struct taskqueue *taskqueue_create_fast(const char *name,
int mflags,
taskqueue_enqueue_fn enqueue,
void *context);
+/*
+ * This queue is used to process asynchronous device events such as
+ * hot plug insertion and removal of devices.
+ */
+TASKQUEUE_DECLARE(bus);
+
#endif /* !_SYS_TASKQUEUE_H_ */
