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  1. 06 11月, 2009 3 次提交
  3. 29 10月, 2009 1 次提交
  5. 19 10月, 2009 1 次提交
    • E
      inet: rename some inet_sock fields · c720c7e8
      由 Eric Dumazet 提交于 
      In order to have better cache layouts of struct sock (separate zones
for rx/tx paths), we need this preliminary patch.

Goal is to transfert fields used at lookup time in the first
read-mostly cache line (inside struct sock_common) and move sk_refcnt
to a separate cache line (only written by rx path)

This patch adds inet_ prefix to daddr, rcv_saddr, dport, num, saddr,
sport and id fields. This allows a future patch to define these
fields as macros, like sk_refcnt, without name clashes.
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      c720c7e8
  7. 07 10月, 2009 1 次提交
  9. 02 10月, 2009 1 次提交
  11. 15 9月, 2009 1 次提交
  13. 29 8月, 2009 1 次提交
  15. 13 7月, 2009 1 次提交
  17. 04 6月, 2009 1 次提交
  19. 02 6月, 2009 1 次提交
    • N
      ipv4: New multicast-all socket option · f771bef9
      由 Nivedita Singhvi 提交于 
      After some discussion offline with Christoph Lameter and David Stevens
regarding multicast behaviour in Linux, I'm submitting a slightly
modified patch from the one Christoph submitted earlier.

This patch provides a new socket option IP_MULTICAST_ALL.

In this case, default behaviour is _unchanged_ from the current
Linux standard. The socket option is set by default to provide
original behaviour. Sockets wishing to receive data only from
multicast groups they join explicitly will need to clear this
socket option.
Signed-off-by: NNivedita Singhvi <niv@us.ibm.com>
Signed-off-by: Christoph Lameter<cl@linux.com>
Acked-by: NDavid Stevens <dlstevens@us.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      f771bef9
  21. 27 5月, 2009 2 次提交
  23. 17 4月, 2009 1 次提交
    • E
      [PATCH] net: remove superfluous call to synchronize_net() · 573636cb
      由 Eric Dumazet 提交于 
      inet_register_protosw() function is responsible for adding a new
inet protocol into a global table (inetsw[]) that is used with RCU rules.

As soon as the store of the pointer is done, other cpus might see
this new protocol in inetsw[], so we have to make sure new protocol
is ready for use. All pending memory updates should thus be committed
to memory before setting the pointer.
This is correctly done using rcu_assign_pointer()

synchronize_net() is typically used at unregister time, after
unsetting the pointer, to make sure no other cpu is still using
the object we want to dismantle. Using it at register time
is only adding an artificial delay that could hide a real bug,
and this bug could popup if/when synchronize_rcu() can proceed
faster than now.

This saves about 13 ms on boot time on a HZ=1000 8 cpus machine  ;) 
(4 calls to inet_register_protosw(), and about 3200 us per call)
Signed-off-by: NEric Dumazet <dada1@cosmosbay.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      573636cb
  25. 10 3月, 2009 1 次提交
  27. 20 2月, 2009 1 次提交
  29. 09 2月, 2009 1 次提交
  31. 02 2月, 2009 1 次提交
  33. 01 2月, 2009 1 次提交
  35. 30 1月, 2009 1 次提交
    • H
      gro: Avoid copying headers of unmerged packets · 86911732
      由 Herbert Xu 提交于 
      Unfortunately simplicity isn't always the best.  The fraginfo
interface turned out to be suboptimal.  The problem was quite
obvious.  For every packet, we have to copy the headers from
the frags structure into skb->head, even though for 99% of the
packets this part is immediately thrown away after the merge.

LRO didn't have this problem because it directly read the headers
from the frags structure.

This patch attempts to address this by creating an interface
that allows GRO to access the headers in the first frag without
having to copy it.  Because all drivers that use frags place the
headers in the first frag this optimisation should be enough.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      86911732
  37. 26 12月, 2008 1 次提交
  39. 16 12月, 2008 2 次提交
    • H
      tcp: Add GRO support · bf296b12
      由 Herbert Xu 提交于 
      This patch adds the TCP-specific portion of GRO.  The criterion for
merging is extremely strict (the TCP header must match exactly apart
from the checksum) so as to allow refragmentation.  Otherwise this
is pretty much identical to LRO, except that we support the merging
of ECN packets.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      bf296b12
    • H
      ipv4: Add GRO infrastructure · 73cc19f1
      由 Herbert Xu 提交于 
      This patch adds GRO support for IPv4.

The criteria for merging is more stringent than LRO, in particular,
we require all fields in the IP header to be identical except for
the length, ID and checksum.  In addition, the ID must form an
arithmetic sequence with a difference of one.

The ID requirement might seem overly strict, however, most hardware
TSO solutions already obey this rule.  Linux itself also obeys this
whether GSO is in use or not.

In future we could relax this rule by storing the IDs (or rather
making sure that we don't drop them when pulling the aggregate
skb's tail).
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      73cc19f1
  41. 24 11月, 2008 1 次提交
  43. 20 11月, 2008 1 次提交
  45. 31 10月, 2008 1 次提交
  47. 01 10月, 2008 1 次提交
  49. 27 7月, 2008 1 次提交
  51. 26 7月, 2008 2 次提交
  53. 18 7月, 2008 9 次提交