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  1. 24 Jun, 2013 29 commits
  3. 21 Jun, 2013 1 commit
  5. 20 Jun, 2013 10 commits
    • Joe Perches's avatar
      ndisc: Convert use of typedef ctl_table to struct ctl_table · fedaf4ff
      Joe Perches authored 
      This typedef is unnecessary and should just be removed.
Signed-off-by: default avatarJoe Perches <joe@perches.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      fedaf4ff
    • Joe Perches's avatar
      ipv6: Convert use of typedef ctl_table to struct ctl_table · 9e8cda3b
      Joe Perches authored 
      This typedef is unnecessary and should just be removed.
Signed-off-by: default avatarJoe Perches <joe@perches.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      9e8cda3b
    • Rami Rosen's avatar
      inet: frag , remove an empty ifdef. · af92e542
      Rami Rosen authored 
      This patch removes an empty ifdef from inet_frag_intern()
in net/ipv4/inet_fragment.c.

commit b67bfe0d
(hlist: drop the node parameter from iterators) removed hlist from
net/ipv4/inet_fragment.c, but did not remove the enclosing ifdef command,
which is now empty.
Signed-off-by: default avatarRami Rosen <ramirose@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      af92e542
    • Eric Dumazet's avatar
      htb: refactor struct htb_sched fields for performance · c9364636
      Eric Dumazet authored 
      htb_sched structures are big, and source of false sharing on SMP.

Every time a packet is queued or dequeue, many cache lines must be
touched because structures are not lay out properly.

By carefully splitting htb_sched in two parts, and define sub structures
to increase data locality, we can improve performance dramatically on
SMP.

New htb_prio structure can also be used in htb_class to increase data
locality.

I got 26 % performance increase on a 24 threads machine, with 200
concurrent netperf in TCP_RR mode, using a HTB hierarchy of 4 classes.
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Cc: Tom Herbert <therbert@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      c9364636
    • Cong Wang's avatar
      tcp: introduce a per-route knob for quick ack · bcefe17c
      Cong Wang authored 
      In previous discussions, I tried to find some reasonable heuristics
for delayed ACK, however this seems not possible, according to Eric:

	"ACKS might also be delayed because of bidirectional
	traffic, and is more controlled by the application
	response time. TCP stack can not easily estimate it."

	"ACK can be incredibly useful to recover from losses in
	a short time.

	The vast majority of TCP sessions are small lived, and we
	send one ACK per received segment anyway at beginning or
	retransmits to let the sender smoothly increase its cwnd,
	so an auto-tuning facility wont help them that much."

and according to David:

	"ACKs are the only information we have to detect loss.

	And, for the same reasons that TCP VEGAS is fundamentally
	broken, we cannot measure the pipe or some other
	receiver-side-visible piece of information to determine
	when it's "safe" to stretch ACK.

	And even if it's "safe", we should not do it so that losses are
	accurately detected and we don't spuriously retransmit.

	The only way to know when the bandwidth increases is to
	"test" it, by sending more and more packets until drops happen.
	That's why all successful congestion control algorithms must
	operate on explicited tested pieces of information.

	Similarly, it's not really possible to universally know if
	it's safe to stretch ACK or not."

It still makes sense to enable or disable quick ack mode like
what TCP_QUICK_ACK does.

Similar to TCP_QUICK_ACK option, but for people who can't
modify the source code and still wants to control
TCP delayed ACK behavior. As David suggested, this should belong
to per-path scope, since different pathes may want different
behaviors.

Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Rick Jones <rick.jones2@hp.com>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Thomas Graf <tgraf@suug.ch>
CC: David Laight <David.Laight@ACULAB.COM>
Signed-off-by: default avatarCong Wang <amwang@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      bcefe17c
    • Dave Jones's avatar
      sctp: Convert __list_for_each use to list_for_each · 2c0740e4
      Dave Jones authored 
      Signed-off-by: default avatarDave Jones <davej@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      2c0740e4
    • Yijing Wang's avatar
      bnx2: use pdev->pm_cap instead of pci_find_capability(.., PCI_CAP_ID_PM) · 85768271
      Yijing Wang authored 
      Pci core has been saved pm cap register offset by pdev->pm_cap in pci_pm_init()
in init path. So we can use pdev->pm_cap instead of using
pci_find_capability(pdev, PCI_CAP_ID_PM) for better performance and simplified code.
Signed-off-by: default avatarYijing Wang <wangyijing@huawei.com>
Cc: Michael Chan <mchan@broadcom.com>
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      85768271
    • Yijing Wang's avatar
      amd8111e: use pdev->pm_cap instead of pci_find_capability(.., PCI_CAP_ID_PM) · f9c7da5e
      Yijing Wang authored 
      Pci core has been saved pm cap register offset by pdev->pm_cap in pci_pm_init()
in init path. So we can use pdev->pm_cap instead of using
pci_find_capability(pdev, PCI_CAP_ID_PM) for better performance and simplified code.
Signed-off-by: default avatarYijing Wang <wangyijing@huawei.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Patrick McHardy <kaber@trash.net>
Cc: Bill Pemberton <wfp5p@virginia.edu>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: netdev@vger.kernel.org (open list:NETWORKING DRIVERS)
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      f9c7da5e
    • Yijing Wang's avatar
      Bnx2x: remove redundant D0 power state set · b8a39dd2
      Yijing Wang authored 
      Pci_enable_device() will set device power state to D0,
so it's no need to do it again in bnx2x_init_dev().
Also remove redundant PM Cap find code, because pci core
has been saved the pci device pm cap value.
Signed-off-by: default avatarYijing Wang <wangyijing@huawei.com>
Cc: Eilon Greenstein <eilong@broadcom.com>
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Acked-by: default avatarYuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b8a39dd2
    • Ben Hutchings's avatar
      net: Add missing dependencies on NETDEVICES · 2206209e
      Ben Hutchings authored 
      ETRAX_ETHERNET selects ETHERNET and MII, which depend on NETDEVICES.
I don't think anything should select NETDEVICES, so make it a
dependency.  It also doesn't need to select or depend on ETHERNET,
which has nothing to do with the Ethernet library functions.

BPCTL selects MII, which depends on NETDEVICES.  But everything in the
drivers/staging/silicom directory is related to net devices, so make
NET_VENDOR_SILICOM depend on NETDEVICES and remove the now-redundant
dependencies on NET.
Signed-off-by: default avatarBen Hutchings <ben@decadent.org.uk>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      2206209e
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