diff options
| author | David Howells <dhowells@redhat.com> | 2022-10-10 15:51:39 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2022-12-01 13:36:41 +0000 |
| commit | 15f661dc95daec9b38e8e4cc931c95afe0ae0cef (patch) | |
| tree | aa5687f899ffe2c55438704c386ac5cdaed4370a /net/rxrpc/io_thread.c | |
| parent | 81f2e8adc0fd10847637873dafe8610f3fb4cdff (diff) | |
| download | linux-15f661dc95daec9b38e8e4cc931c95afe0ae0cef.tar.gz linux-15f661dc95daec9b38e8e4cc931c95afe0ae0cef.tar.bz2 linux-15f661dc95daec9b38e8e4cc931c95afe0ae0cef.zip | |
rxrpc: Implement a mechanism to send an event notification to a call
Provide a means by which an event notification can be sent to a call such
that the I/O thread can process it rather than it being done in a separate
workqueue. This will allow a lot of locking to be removed.
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
Diffstat (limited to 'net/rxrpc/io_thread.c')
| -rw-r--r-- | net/rxrpc/io_thread.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/net/rxrpc/io_thread.c b/net/rxrpc/io_thread.c index 416c6101cf78..cc249bc6b8cd 100644 --- a/net/rxrpc/io_thread.c +++ b/net/rxrpc/io_thread.c @@ -366,7 +366,7 @@ static int rxrpc_input_packet(struct rxrpc_local *local, struct sk_buff *skb) /* Process a call packet; this either discards or passes on the ref * elsewhere. */ - rxrpc_input_call_packet(call, skb); + rxrpc_input_call_event(call, skb); goto out; discard: @@ -413,6 +413,7 @@ int rxrpc_io_thread(void *data) { struct sk_buff_head rx_queue; struct rxrpc_local *local = data; + struct rxrpc_call *call; struct sk_buff *skb; skb_queue_head_init(&rx_queue); @@ -422,6 +423,20 @@ int rxrpc_io_thread(void *data) for (;;) { rxrpc_inc_stat(local->rxnet, stat_io_loop); + /* Deal with calls that want immediate attention. */ + if ((call = list_first_entry_or_null(&local->call_attend_q, + struct rxrpc_call, + attend_link))) { + spin_lock_bh(&local->lock); + list_del_init(&call->attend_link); + spin_unlock_bh(&local->lock); + + trace_rxrpc_call_poked(call); + rxrpc_input_call_event(call, NULL); + rxrpc_put_call(call, rxrpc_call_put_poke); + continue; + } + /* Process received packets and errors. */ if ((skb = __skb_dequeue(&rx_queue))) { switch (skb->mark) { @@ -450,7 +465,8 @@ int rxrpc_io_thread(void *data) } set_current_state(TASK_INTERRUPTIBLE); - if (!skb_queue_empty(&local->rx_queue)) { + if (!skb_queue_empty(&local->rx_queue) || + !list_empty(&local->call_attend_q)) { __set_current_state(TASK_RUNNING); continue; } |