diff options
Diffstat (limited to 'features/rt/net-Use-skbufhead-with-raw-lock.patch')
| -rw-r--r-- | features/rt/net-Use-skbufhead-with-raw-lock.patch | 73 |
1 files changed, 0 insertions, 73 deletions
diff --git a/features/rt/net-Use-skbufhead-with-raw-lock.patch b/features/rt/net-Use-skbufhead-with-raw-lock.patch deleted file mode 100644 index 3309dda6..00000000 --- a/features/rt/net-Use-skbufhead-with-raw-lock.patch +++ /dev/null @@ -1,73 +0,0 @@ -From d7ca8b65392672151fbaaa0c0ec93b3be0dd2d51 Mon Sep 17 00:00:00 2001 -From: Thomas Gleixner <tglx@linutronix.de> -Date: Tue, 12 Jul 2011 15:38:34 +0200 -Subject: [PATCH 141/191] net: Use skbufhead with raw lock - -Use the rps lock as rawlock so we can keep irq-off regions. It looks low -latency. However we can't kfree() from this context therefore we defer this -to the softirq and use the tofree_queue list for it (similar to process_queue). - -Signed-off-by: Thomas Gleixner <tglx@linutronix.de> ---- - include/linux/skbuff.h | 7 +++++++ - net/core/dev.c | 6 +++--- - 2 files changed, 10 insertions(+), 3 deletions(-) - -diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h -index 6d0a33d1c0db..3402903b5cf0 100644 ---- a/include/linux/skbuff.h -+++ b/include/linux/skbuff.h -@@ -295,6 +295,7 @@ struct sk_buff_head { - - __u32 qlen; - spinlock_t lock; -+ raw_spinlock_t raw_lock; - }; - - struct sk_buff; -@@ -1902,6 +1903,12 @@ static inline void skb_queue_head_init(struct sk_buff_head *list) - __skb_queue_head_init(list); - } - -+static inline void skb_queue_head_init_raw(struct sk_buff_head *list) -+{ -+ raw_spin_lock_init(&list->raw_lock); -+ __skb_queue_head_init(list); -+} -+ - static inline void skb_queue_head_init_class(struct sk_buff_head *list, - struct lock_class_key *class) - { -diff --git a/net/core/dev.c b/net/core/dev.c -index 2d6ee43e02b8..16c9aa19ede2 100644 ---- a/net/core/dev.c -+++ b/net/core/dev.c -@@ -223,14 +223,14 @@ static inline struct hlist_head *dev_index_hash(struct net *net, int ifindex) - static inline void rps_lock(struct softnet_data *sd) - { - #ifdef CONFIG_RPS -- spin_lock(&sd->input_pkt_queue.lock); -+ raw_spin_lock(&sd->input_pkt_queue.raw_lock); - #endif - } - - static inline void rps_unlock(struct softnet_data *sd) - { - #ifdef CONFIG_RPS -- spin_unlock(&sd->input_pkt_queue.lock); -+ raw_spin_unlock(&sd->input_pkt_queue.raw_lock); - #endif - } - -@@ -11478,7 +11478,7 @@ static int __init net_dev_init(void) - - INIT_WORK(flush, flush_backlog); - -- skb_queue_head_init(&sd->input_pkt_queue); -+ skb_queue_head_init_raw(&sd->input_pkt_queue); - skb_queue_head_init(&sd->process_queue); - #ifdef CONFIG_XFRM_OFFLOAD - skb_queue_head_init(&sd->xfrm_backlog); --- -2.19.1 - |