Skip to content

L
linux
Switch branch/tag
  1. 23 Sep, 2015 18 commits
  3. 22 Sep, 2015 16 commits
  5. 21 Sep, 2015 6 commits
    • Florian Fainelli's avatar
      net: bcmgenet: Remove duplicate test for tx_coalesce_usecs_high · 852bcafb
      Florian Fainelli authored 
      We were checking twice for ec->tx_coalesce_usecs_high, remove the
duplicate test.
Reported-by: default avatarJulia Lawall <julia.lawall@lip6.fr>
Reported-by: kbuild-all@01.org
Fixes: 2f913070 ("net: bcmgenet: Implement TX coalescing control knobs")
Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      852bcafb
    • Yuchung Cheng's avatar
      tcp: send loss probe after 1s if no RTT available · f9b99582
      Yuchung Cheng authored 
      This patch makes TLP to use 1 sec timer by default when RTT is
not available due to SYN/ACK retransmission or SYN cookies.

Prior to this change, the lack of RTT prevents TLP so the first
data packets sent can only be recovered by fast recovery or RTO.
If the fast recovery fails to trigger the RTO is 3 second when
SYN/ACK is retransmitted. With this patch we can trigger fast
recovery in 1sec instead.

Note that we need to check Fast Open more properly. A Fast Open
connection could be (accepted then) closed before it receives
the final ACK of 3WHS so the state is FIN_WAIT_1. Without the
new check, TLP will retransmit FIN instead of SYN/ACK.
Signed-off-by: default avatarYuchung Cheng <ycheng@google.com>
Signed-off-by: default avatarNandita Dukkipati <nanditad@google.com>
Signed-off-by: default avatarNeal Cardwell <ncardwell@google.com>
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f9b99582
    • Yuchung Cheng's avatar
      tcp: usec resolution SYN/ACK RTT · 0f1c28ae
      Yuchung Cheng authored 
      Currently SYN/ACK RTT is measured in jiffies. For LAN the SYN/ACK
RTT is often measured as 0ms or sometimes 1ms, which would affect
RTT estimation and min RTT samping used by some congestion control.

This patch improves SYN/ACK RTT to be usec resolution if platform
supports it. While the timestamping of SYN/ACK is done in request
sock, the RTT measurement is carefully arranged to avoid storing
another u64 timestamp in tcp_sock.

For regular handshake w/o SYNACK retransmission, the RTT is sampled
right after the child socket is created and right before the request
sock is released (tcp_check_req() in tcp_minisocks.c)

For Fast Open the child socket is already created when SYN/ACK was
sent, the RTT is sampled in tcp_rcv_state_process() after processing
the final ACK an right before the request socket is released.

If the SYN/ACK was retransmistted or SYN-cookie was used, we rely
on TCP timestamps to measure the RTT. The sample is taken at the
same place in tcp_rcv_state_process() after the timestamp values
are validated in tcp_validate_incoming(). Note that we do not store
TS echo value in request_sock for SYN-cookies, because the value
is already stored in tp->rx_opt used by tcp_ack_update_rtt().

One side benefit is that the RTT measurement now happens before
initializing congestion control (of the passive side). Therefore
the congestion control can use the SYN/ACK RTT.
Signed-off-by: default avatarYuchung Cheng <ycheng@google.com>
Signed-off-by: default avatarNeal Cardwell <ncardwell@google.com>
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      0f1c28ae
    • David S. Miller's avatar
      Merge branch 's390-next' · 21fe8af4
      David S. Miller authored 
      Ursula Braun says:

====================
s390: qeth and iucv patches

here is version 2 of some s390 related qeth patches for net-next. The patch by
Thomas Richter adds a new feature to the qeth layer2 code; the remaining
patches are minor improvements.
Version 2 of patch 4 uses the desired indentation in function declarations
and definitions spanning multiple lines in almost all cases. Thomas run into a
conflict with the maximum number of columns once. Thus you will still see one
function definition using an earlier column before the opening paranthesis.
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      21fe8af4
    • Ursula Braun's avatar
      s390/iucv: do not use arrays as argument · 91e60eb6
      Ursula Braun authored 
      The iucv code uses arrays as arguments. Even though this does not
really cause a problem, it could be misleading, since the compiler
turns array arguments into just a pointer argument. To be more
precise this patch changes the array arguments into pointers.
Signed-off-by: default avatarUrsula Braun <ursula.braun@de.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      91e60eb6
    • Thomas Richter's avatar
      qeth: add layer 2 RX/TX checksum offloading · 4d7def2a
      Thomas Richter authored 
      Checksum offloading for send and receive is already
supported for layer 3 (IP layer). This patch
adds support for RX and TX hardware checksum offloading
for layer 2 (MAC layer). The hardware calculates the checksum
for IP UDP and TCP packets.

This patch moves the hardware checksum offloading setup
to the set of common functions in qeth_core_main.c.
Layer 2 and layer 3 now simply call the same common functions.

Also note that TX checksum offloading is always enabled.
The device driver relies on the TCP/IP stack to make use of
this feature.
Signed-off-by: default avatarThomas Richter <tmricht@linux.vnet.ibm.com>
Signed-off-by: default avatarUrsula Braun <ursula.braun@de.ibm.com>
Reviewed-by: default avatarEugene Crosser <Eugene.Crosser@ru.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      4d7def2a
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7