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kernel: port page pool release fix to 6.12
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Port missing fix from 610dd871aa

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2025-10-20 19:10:26 +00:00
parent 13c30c2e58
commit 0408c5dfe6
1 changed files with 9 additions and 3 deletions
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12
target/linux/generic/hack-6.12/610-net-page_pool-try-to-free-deferred-skbs-while-waitin.patch
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@ -16,16 +16,18 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
--- a/net/core/page_pool.c
+++ b/net/core/page_pool.c
@@ -1124,7 +1124,7 @@ static void page_pool_release_retry(stru
@@ -1123,8 +1123,9 @@ static void page_pool_release_retry(stru
{
struct delayed_work *dwq = to_delayed_work(wq);
struct page_pool *pool = container_of(dwq, typeof(*pool), release_dw);
+ unsigned long flags;
void *netdev;
- int inflight;
+ int cpu, inflight;
inflight = page_pool_release(pool);
/* In rare cases, a driver bug may cause inflight to go negative.
@@ -1136,6 +1136,17 @@ static void page_pool_release_retry(stru
@@ -1136,6 +1137,21 @@ static void page_pool_release_retry(stru
if (inflight <= 0)
return;
@ -33,12 +35,16 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+ * defer_list that can stay in the list until we have enough queued
+ * traffic.
+ */
+ local_irq_save(flags);
+ for_each_online_cpu(cpu) {
+ struct softnet_data *sd = &per_cpu(softnet_data, cpu);
+
+ if (!cmpxchg(&sd->defer_ipi_scheduled, 0, 1))
+ if (cpu == raw_smp_processor_id())
+ raise_softirq_irqoff(NET_RX_SOFTIRQ);
+ else if (!cmpxchg(&sd->defer_ipi_scheduled, 0, 1))
+ smp_call_function_single_async(cpu, &sd->defer_csd);
+ }
+ local_irq_restore(flags);
+
/* Periodic warning for page pools the user can't see */
netdev = READ_ONCE(pool->slow.netdev);