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  1. 04 5月, 2010 13 次提交
  3. 03 5月, 2010 4 次提交
  5. 02 5月, 2010 3 次提交
    • D
      net: Inline skb_pull() in eth_type_trans(). · 47d29646
      由 David S. Miller 提交于 
      In commit 6be8ac2f ("[NET]: uninline skb_pull, de-bloats a lot")
we uninlined skb_pull.

But in some critical paths it makes sense to inline this thing
and it helps performance significantly.

Create an skb_pull_inline() so that we can do this in a way that
serves also as annotation.

Based upon a patch by Eric Dumazet.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      47d29646
    • E
      net/usb: initiate sync sequence in sierra_net.c driver · 6f1464bf
      由 Elina Pasheva 提交于 
      The following patch adds the initiation of the sync sequence to
"sierra_net_bind()". If this step is omitted, the modem will never sync up
with the host and it will not be possible to establish a data connection.
Signed-off-by: NElina Pasheva <epasheva@sierrawireless.com>
Signed-off-by: NRory Filer <rfiler@sierrawireless.com>
Tested-by: NElina Pasheva <epasheva@sierrawireless.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      6f1464bf
    • E
      net: sock_def_readable() and friends RCU conversion · 43815482
      由 Eric Dumazet 提交于 
      sk_callback_lock rwlock actually protects sk->sk_sleep pointer, so we
need two atomic operations (and associated dirtying) per incoming
packet.

RCU conversion is pretty much needed :

1) Add a new structure, called "struct socket_wq" to hold all fields
that will need rcu_read_lock() protection (currently: a
wait_queue_head_t and a struct fasync_struct pointer).

[Future patch will add a list anchor for wakeup coalescing]

2) Attach one of such structure to each "struct socket" created in
sock_alloc_inode().

3) Respect RCU grace period when freeing a "struct socket_wq"

4) Change sk_sleep pointer in "struct sock" by sk_wq, pointer to "struct
socket_wq"

5) Change sk_sleep() function to use new sk->sk_wq instead of
sk->sk_sleep

6) Change sk_has_sleeper() to wq_has_sleeper() that must be used inside
a rcu_read_lock() section.

7) Change all sk_has_sleeper() callers to :
  - Use rcu_read_lock() instead of read_lock(&sk->sk_callback_lock)
  - Use wq_has_sleeper() to eventually wakeup tasks.
  - Use rcu_read_unlock() instead of read_unlock(&sk->sk_callback_lock)

8) sock_wake_async() is modified to use rcu protection as well.

9) Exceptions :
  macvtap, drivers/net/tun.c, af_unix use integrated "struct socket_wq"
instead of dynamically allocated ones. They dont need rcu freeing.

Some cleanups or followups are probably needed, (possible
sk_callback_lock conversion to a spinlock for example...).
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      43815482
  7. 01 5月, 2010 20 次提交