[ Sasha's backport helper bot ]
Hi,
✅ All tests passed successfully. No issues detected.
No action required from the submitter.
The upstream commit SHA1 provided is correct: dfd3df31c9db752234d7d2e09bef2aeabb643ce4
Status in newer kernel trees:
6.13.y | Not found
Note: The patch differs from the upstream commit:
---
1: dfd3df31c9db7 ! 1: ec5a5cc49c69d mm/slab/kvfree_rcu: Switch to WQ_MEM_RECLAIM wq
@@ Metadata
## Commit message ##
mm/slab/kvfree_rcu: Switch to WQ_MEM_RECLAIM wq
+ commit dfd3df31c9db752234d7d2e09bef2aeabb643ce4 upstream.
+
Currently kvfree_rcu() APIs use a system workqueue which is
"system_unbound_wq" to driver RCU machinery to reclaim a memory.
@@ Commit message
Signed-off-by: Uladzislau Rezki (Sony) <urezki@xxxxxxxxx>
Reviewed-by: Joel Fernandes <joelagnelf@xxxxxxxxxx>
Signed-off-by: Vlastimil Babka <vbabka@xxxxxxx>
+ Signed-off-by: Uladzislau Rezki (Sony) <urezki@xxxxxxxxx>
- ## mm/slab_common.c ##
-@@ mm/slab_common.c: module_param(rcu_min_cached_objs, int, 0444);
- static int rcu_delay_page_cache_fill_msec = 5000;
- module_param(rcu_delay_page_cache_fill_msec, int, 0444);
+ ## kernel/rcu/tree.c ##
+@@ kernel/rcu/tree.c: void call_rcu(struct rcu_head *head, rcu_callback_t func)
+ }
+ EXPORT_SYMBOL_GPL(call_rcu);
+static struct workqueue_struct *rcu_reclaim_wq;
+
/* Maximum number of jiffies to wait before draining a batch. */
#define KFREE_DRAIN_JIFFIES (5 * HZ)
#define KFREE_N_BATCHES 2
-@@ mm/slab_common.c: __schedule_delayed_monitor_work(struct kfree_rcu_cpu *krcp)
+@@ kernel/rcu/tree.c: __schedule_delayed_monitor_work(struct kfree_rcu_cpu *krcp)
if (delayed_work_pending(&krcp->monitor_work)) {
delay_left = krcp->monitor_work.timer.expires - jiffies;
if (delay < delay_left)
@@ mm/slab_common.c: __schedule_delayed_monitor_work(struct kfree_rcu_cpu *krcp)
}
static void
-@@ mm/slab_common.c: kvfree_rcu_queue_batch(struct kfree_rcu_cpu *krcp)
+@@ kernel/rcu/tree.c: kvfree_rcu_queue_batch(struct kfree_rcu_cpu *krcp)
// "free channels", the batch can handle. Break
// the loop since it is done with this CPU thus
// queuing an RCU work is _always_ success here.
@@ mm/slab_common.c: kvfree_rcu_queue_batch(struct kfree_rcu_cpu *krcp)
WARN_ON_ONCE(!queued);
break;
}
-@@ mm/slab_common.c: run_page_cache_worker(struct kfree_rcu_cpu *krcp)
+@@ kernel/rcu/tree.c: run_page_cache_worker(struct kfree_rcu_cpu *krcp)
if (rcu_scheduler_active == RCU_SCHEDULER_RUNNING &&
!atomic_xchg(&krcp->work_in_progress, 1)) {
if (atomic_read(&krcp->backoff_page_cache_fill)) {
@@ mm/slab_common.c: run_page_cache_worker(struct kfree_rcu_cpu *krcp)
&krcp->page_cache_work,
msecs_to_jiffies(rcu_delay_page_cache_fill_msec));
} else {
-@@ mm/slab_common.c: void __init kvfree_rcu_init(void)
+@@ kernel/rcu/tree.c: static void __init kfree_rcu_batch_init(void)
int i, j;
struct shrinker *kfree_rcu_shrinker;
---
Results of testing on various branches:
| Branch | Patch Apply | Build Test |
|---------------------------|-------------|------------|
| stable/linux-6.12.y | Success | Success |
| stable/linux-6.13.y | Success | Success |
