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rds: use list structure to track information for zerocopy completion notification

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Commit 401910db4c ("rds: deliver zerocopy completion notification
with data") removes support fo r zerocopy completion notification
on the sk_error_queue, thus we no longer need to track the cookie
information in sk_buff structures.

This commit removes the struct sk_buff_head rs_zcookie_queue by
a simpler list that results in a smaller memory footprint as well
as more efficient memory_allocation time.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sowmini Varadhan
2018-03-06 07:22:34 -08:00
committed by David S. Miller
parent d40a126b16
commit 9426bbc6de
4 changed files with 85 additions and 44 deletions
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23
net/rds/rds.h
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@@ -357,16 +357,27 @@ static inline u32 rds_rdma_cookie_offset(rds_rdma_cookie_t cookie)
#define RDS_MSG_FLUSH 8
struct rds_znotifier {
struct list_head z_list;
struct mmpin z_mmp;
u32 z_cookie;
};
#define RDS_ZCOPY_SKB(__skb) ((struct rds_znotifier *)&((__skb)->cb[0]))
struct rds_msg_zcopy_info {
struct list_head rs_zcookie_next;
union {
struct rds_znotifier znotif;
struct rds_zcopy_cookies zcookies;
};
};
static inline struct sk_buff *rds_skb_from_znotifier(struct rds_znotifier *z)
struct rds_msg_zcopy_queue {
struct list_head zcookie_head;
spinlock_t lock; /* protects zcookie_head queue */
};
static inline void rds_message_zcopy_queue_init(struct rds_msg_zcopy_queue *q)
{
return container_of((void *)z, struct sk_buff, cb);
spin_lock_init(&q->lock);
INIT_LIST_HEAD(&q->zcookie_head);
}
struct rds_message {
@@ -603,8 +614,7 @@ struct rds_sock {
/* Socket receive path trace points*/
u8 rs_rx_traces;
u8 rs_rx_trace[RDS_MSG_RX_DGRAM_TRACE_MAX];
struct sk_buff_head rs_zcookie_queue;
struct rds_msg_zcopy_queue rs_zcookie_queue;
};
static inline struct rds_sock *rds_sk_to_rs(const struct sock *sk)
@@ -803,6 +813,7 @@ void rds_message_addref(struct rds_message *rm);
void rds_message_put(struct rds_message *rm);
void rds_message_wait(struct rds_message *rm);
void rds_message_unmapped(struct rds_message *rm);
void rds_notify_msg_zcopy_purge(struct rds_msg_zcopy_queue *info);
static inline void rds_message_make_checksum(struct rds_header *hdr)
{