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linux-stable/drivers/net/ethernet
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françois romieu 7dbb491878 r8169: avoid NAPI scheduling delay. 
While reworking the r8169 driver a few months ago to perform the
smallest amount of work in the irq handler, I took care of avoiding
any irq mask register operation in the slow work dedicated user
context thread. The slow work thread scheduled an extra round of NAPI
work which would ultimately set the irq mask register as required,
thus keeping such irq mask operations in the NAPI handler.
It would eventually race with the irq handler and delay NAPI execution
for - assuming no further irq - a whole ksoftirqd period. Mildly a
problem for rare link changes or corner case PCI events.

The race was always lost after the last bh disabling lock had been
removed from the work thread and people started wondering where those
pesky "NOHZ: local_softirq_pending 08" messages came from.

Actually the irq mask register _can_ be set up directly in the slow
work thread.

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Reported-by: Dave Jones <davej@redhat.com>
Tested-by: Marc Dionne <marc.c.dionne@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-06-10 20:21:07 -07:00
..
3com Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-05-22 19:22:50 -07:00
8390 drivers/net: delete all code/drivers depending on CONFIG_MCA 2012-05-17 16:37:41 -04:00
adaptec starfire: remove deprecated options. 2012-04-07 11:45:26 +02:00
adi bfin: Fix build failure due to get_ts_info() changes. 2012-04-06 00:17:50 -04:00
aeroflex
alteon Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
amd Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k 2012-05-21 12:43:54 -07:00
apple
atheros atl1c: remove PHY polling from atl1c_change_mtu 2012-04-30 21:44:16 -04:00
broadcom Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-05-22 19:22:50 -07:00
brocade Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-05-22 19:22:50 -07:00
cadence net/at91_ether: use gpio_to_irq for phy IRQ line 2012-04-28 21:48:39 -04:00
calxeda
chelsio cxgb4: DB Drop Recovery for RDMA and LLD queues 2012-05-18 13:22:28 -07:00
cirrus cirrus: cs89x0: Remove function prototypes and reorder declarations 2012-05-18 23:48:07 -04:00
cisco drivers/net: Convert compare_ether_addr to ether_addr_equal 2012-05-10 23:33:01 -04:00
davicom dm9000: some coldfire boards need this 2012-05-14 18:40:16 -04:00
dec drivers/net: Convert compare_ether_addr to ether_addr_equal 2012-05-10 23:33:01 -04:00
dlink Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-07 23:35:40 -04:00
emulex be2net: fix a race in be_xmit() 2012-06-08 14:44:19 -07:00
faraday
freescale fec_mpc52xx: fix timestamp filtering 2012-06-02 17:09:08 -04:00
fujitsu drivers/net: delete all code/drivers depending on CONFIG_MCA 2012-05-17 16:37:41 -04:00
hp
i825xx drivers/net: delete all code/drivers depending on CONFIG_MCA 2012-05-17 16:37:41 -04:00
ibm ehea: fix losing of NEQ events when one event occurred early 2012-05-10 22:45:54 -04:00
icplus
intel ixgbe: IXGBE_RXD_STAT_VP set even with Rx stripping enabled 2012-06-05 21:04:25 -07:00
marvell sky2: fix checksum bit management on some chips 2012-06-07 13:06:42 -07:00
mellanox net/mlx4_core: Fix obscure mlx4_cmd_box parameter in QUERY_DEV_CAP 2012-05-31 18:18:16 -04:00
micrel Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-16 22:17:37 -04:00
microchip
myricom myri10ge: stop using net_device.{base_addr, irq}. 2012-04-07 11:58:09 +02:00
natsemi drivers/net: delete all code/drivers depending on CONFIG_MCA 2012-05-17 16:37:41 -04:00
neterion Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-04-10 14:30:45 -04:00
nuvoton
nvidia forcedeth: add transmit timestamping support 2012-04-30 21:33:27 -04:00
nxp arm-soc: device tree conversions, part 1 2012-05-22 09:30:52 -07:00
octeon
oki-semi Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-16 22:17:37 -04:00
packetengines yellowfin: stop using net_device.{base_addr, irq}. 2012-04-07 11:45:26 +02:00
pasemi net/pasemi: fix compiler warning 2012-05-02 20:52:48 -04:00
qlogic Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-05-22 19:22:50 -07:00
racal
rdc r6040: Do a Proper deinit at errorpath and also when driver unloads (calling r6040_remove_one) 2012-05-29 22:31:08 -04:00
realtek r8169: avoid NAPI scheduling delay. 2012-06-10 20:21:07 -07:00
renesas net: sh_eth: fix the rxdesc pointer when rx descriptor empty happens 2012-05-29 17:30:08 -04:00
seeq Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
sfc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-16 22:17:37 -04:00
sgi
silan sc92031: stop using net_device.{base_addr, irq} 2012-04-07 11:45:27 +02:00
sis sis900: stop using net_device.{base_addr, irq} and convert to __iomem. 2012-04-07 11:47:18 +02:00
smsc net/smsc911x: Repair broken failure paths 2012-05-30 17:52:16 -04:00
stmicro stmmac: fix driver built w/ w/o both pci and platf modules 2012-06-07 22:46:48 -07:00
sun Revert "niu: Add support for byte queue limits." 2012-06-08 00:28:16 -07:00
tehuti Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-05-22 19:22:50 -07:00
ti arm-soc: cleanups, part 2 2012-05-26 12:31:49 -07:00
tile drivers/net: Convert compare_ether_addr to ether_addr_equal 2012-05-10 23:33:01 -04:00
toshiba drivers/net: Convert compare_ether_addr to ether_addr_equal 2012-05-10 23:33:01 -04:00
tundra Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
via Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-04-10 14:30:45 -04:00
wiznet net: WIZnet drivers: fix possible NULL dereference 2012-04-13 13:34:12 -04:00
xilinx Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-04-15 13:19:04 -04:00
xircom Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
xscale net: remove ixp2000 ethernet driver 2012-04-04 18:09:37 -04:00
dnet.c dnet: Support the get_ts_info ethtool method. 2012-04-04 05:28:46 -04:00
dnet.h
ethoc.c
fealnx.c fealnx: Remove unused local label 'out' in netdev_open(). 2012-04-07 09:02:32 -04:00
jme.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-02-26 21:55:51 -05:00
jme.h
Kconfig Ethernet driver for the WIZnet W5300 chip 2012-04-05 01:43:02 -04:00
korina.c Remove all #inclusions of asm/system.h 2012-03-28 18:30:03 +01:00
lantiq_etop.c
Makefile Ethernet driver for the WIZnet W5300 chip 2012-04-05 01:43:02 -04:00
mipsnet.c
netx-eth.c
s6gmac.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-05-22 19:22:50 -07:00