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  1. 29 10月, 2014 14 次提交
  3. 28 10月, 2014 13 次提交
  5. 27 10月, 2014 8 次提交
  7. 26 10月, 2014 4 次提交
    • D
      Merge branch 'sunvnet-napi' · 9286ae01
      由 David S. Miller 提交于 
      Sowmini Varadhan says:

====================
sunvnet: NAPIfy sunvnet

This patchset converts the sunvnet driver to use the NAPI framework.
Changes since v4 to Patch1:
  vnet_event accumulates LDC_EVENT_* bits into rx_event.
  vnet_event_napi() unrolls send_events() logic to process all rx_event bits.
Changes since v5:
  Patch 1: use net_device.h definition for NAPI_POLL_WEIGHT.
  Drop sparclinux changes (patch3) per David Miller feedback

Patch 1 in the series addresses the packet-receive path- all
the vnet_event() processing is moved into NAPI context.
This patch is dependant on the sparc-next commit:
  "sparc64: Add vio_set_intr() to enable/disable Rx interrupts"
  (sparc commit id ca605b7d)

Patch 2 uses RCU to fix race conditions between vnet_port_remove and
paths that access/modify port-related state, such as vnet_start_xmit.

Patch 3 leverages from the NAPIfied Rx path,
dropping superfluous usage of the irqsave/irqrestores on the vio.lock
where possible.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      9286ae01
    • S
      sunvnet: Remove irqsave/irqrestore on vio.lock · 13b13dd9
      由 Sowmini Varadhan 提交于 
      After the  NAPIfication of sunvnet, we no longer need to
synchronize by doing irqsave/restore on vio.lock in the
I/O fastpath.

NAPI ->poll() is non-reentrant, so all RX processing occurs
strictly in a serialized environment. TX reclaim is done in NAPI
context, so the netif_tx_lock can be used to serialize
critical sections between Tx and Rx paths.
Signed-off-by: NSowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      13b13dd9
    • S
      sunvnet: Use RCU to synchronize port usage with vnet_port_remove() · 2a968dd8
      由 Sowmini Varadhan 提交于 
      A vnet_port_remove could be triggered as a result of an ldm-unbind
operation by the peer, module unload, or other changes to the
inter-vnet-link configuration.  When this is concurrent with
vnet_start_xmit(), there are several race sequences possible,
such as

thread 1                                    thread 2
vnet_start_xmit
-> tx_port_find
   spin_lock_irqsave(&vp->lock..)
   ret = __tx_port_find(..)
   spin_lock_irqrestore(&vp->lock..)
                                           vio_remove -> ..
                                               ->vnet_port_remove
                                           spin_lock_irqsave(&vp->lock..)
                                           cleanup
                                           spin_lock_irqrestore(&vp->lock..)
                                           kfree(port)
/* attempt to use ret will bomb */

This patch adds RCU locking for port access so that vnet_port_remove
will correctly clean up port-related state.
Signed-off-by: NSowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: NDwight Engen <dwight.engen@oracle.com>
Acked-by: NBob Picco <bob.picco@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      2a968dd8
    • S
      sunvnet: NAPIfy sunvnet · 69088822
      由 Sowmini Varadhan 提交于 
      Move Rx packet procssing to the NAPI poll callback.
Disable VIO interrupt and unconditioanlly go into NAPI
context from vnet_event.

Note that we want to minimize the number of LDC
STOP/START messages sent. Specifically, do not send a STOP
message if vnet_walk_rx does not read all the available descriptors
because of the NAPI budget limitation. Instead, note the end index
as part of port state, and resume from this index when the
next poll callback is triggered.
Signed-off-by: NSowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: NRaghuram Kothakota <raghuram.kothakota@oracle.com>
Acked-by: NDwight Engen <dwight.engen@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      69088822
  9. 25 10月, 2014 1 次提交
    • D
      Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-next · 132fb579
      由 David S. Miller 提交于 
      Jeff Kirsher says:

====================
Intel Wired LAN Driver Updates 2014-10-23

This series contains updates to i40e and i40evf.

Jesse modifies the i40e driver to only notify the firmware on link up/down
and qualified module events.  Also simplified the job of managing link
state by using the admin queue receive event for link events as a signal
to tell the driver to update link state.

Jeff (me) cleans up the inconsistent use of tabs for indentation in the admin
queue command header file.

Neerav converts the use of udelay() to usleep_range().

Anjali fixes a bug where receive would stop after some stress by adding
a sleep and restart as well as moving the setting of flow control because
it should be done at a PF level and not a VSI level.

Mitch adds code to handle link events when updating the PF switch, which
allows link information to be properly provided to VFS in all cases.

Catherine adds driver support for 10GBaseT and bumps driver version.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      132fb579