linux_dsm_epyc7002/drivers/net/ethernet/intel/igb
David S. Miller 0b725a2ca6 net: Remove ndo_xmit_flush netdev operation, use signalling instead.
As reported by Jesper Dangaard Brouer, for high packet rates the
overhead of having another indirect call in the TX path is
non-trivial.

There is the indirect call itself, and then there is all of the
reloading of the state to refetch the tail pointer value and
then write the device register.

Move to a more passive scheme, which requires very light modifications
to the device drivers.

The signal is a new skb->xmit_more value, if it is non-zero it means
that more SKBs are pending to be transmitted on the same queue as the
current SKB.  And therefore, the driver may elide the tail pointer
update.

Right now skb->xmit_more is always zero.

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-08-25 16:29:42 -07:00
..
e1000_82575.c igb: remove unnecessary break after return 2014-07-20 21:30:18 -07:00
e1000_82575.h igb: Cleanups to change comment style on license headers 2014-04-24 17:26:27 -07:00
e1000_defines.h igb: Workaround for i210 Errata 25: Slow System Clock 2014-07-10 01:48:28 -07:00
e1000_hw.h igb: Workaround for i210 Errata 25: Slow System Clock 2014-07-10 01:48:28 -07:00
e1000_i210.c igb: Workaround for i210 Errata 25: Slow System Clock 2014-07-10 01:48:28 -07:00
e1000_i210.h igb: Workaround for i210 Errata 25: Slow System Clock 2014-07-10 01:48:28 -07:00
e1000_mac.c igb: Cleanups to fix msleep warnings 2014-04-24 17:41:15 -07:00
e1000_mac.h igb: Cleanups to change comment style on license headers 2014-04-24 17:26:27 -07:00
e1000_mbx.c igb: Cleanups to change comment style on license headers 2014-04-24 17:26:27 -07:00
e1000_mbx.h igb: Cleanups to change comment style on license headers 2014-04-24 17:26:27 -07:00
e1000_nvm.c igb/ixgbe: remove return statements for void functions 2014-05-23 05:28:41 -07:00
e1000_nvm.h igb: Cleanups to change comment style on license headers 2014-04-24 17:26:27 -07:00
e1000_phy.c igb: remove redundant PHY power down register write 2014-05-27 02:10:44 -07:00
e1000_phy.h igb: remove redundant PHY power down register write 2014-05-27 02:10:44 -07:00
e1000_regs.h igb: Add message when malformed packets detected by hw 2014-07-24 03:00:37 -07:00
igb_ethtool.c igb: unhide invariant returns 2014-06-11 08:45:48 -07:00
igb_hwmon.c igb: Cleanups to change comment style on license headers 2014-04-24 17:26:27 -07:00
igb_main.c net: Remove ndo_xmit_flush netdev operation, use signalling instead. 2014-08-25 16:29:42 -07:00
igb_ptp.c igb: separate hardware setting from the set_ts_config ioctl 2014-06-11 08:45:55 -07:00
igb.h igb: Cleanups to change comment style on license headers 2014-04-24 17:26:27 -07:00
Makefile igb: Update license text to remove FSF address and update copyright. 2014-02-26 15:54:52 -05:00