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OpenCloudOS-Kernel
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Steve Hodgson 244558006c sfc: Recycle discarded rx buffers back onto the queue 
The cut-through design of the receive path means that packets that
fail to match the appropriate MAC filter are not discarded at the MAC
but are flagged in the completion event as 'to be discarded'.  On
networks with heavy multicast traffic, this can account for a
significant proportion of received packets, so it is worthwhile to
recycle the buffer immediately in this case rather than freeing it
and then reallocating it shortly after.

The only complication here is dealing with a page shared
between two receive buffers. In that case, we need to be
careful to free the dma mapping when both buffers have
been free'd by the kernel. This means that we can only
recycle such a page if both receive buffers are discarded.
Unfortunately, in an environment with 1500mtu,
rx_alloc_method=PAGE, and a mixture of discarded and
not-discarded frames hitting the same receive queue,
buffer recycling won't always be possible.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2010-06-02 02:21:09 -07:00
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accessibility
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acpi Merge branch 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6 2010-05-28 16:14:17 -07:00
amba
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ata libata: implement dump_id force param 2010-05-25 19:41:19 -04:00
atm atm: [he] rewrite buffer handling in receive path 2010-05-31 00:27:47 -07:00
auxdisplay auxdisplay: section cleanup in cfag12864bfb driver 2010-05-25 08:07:09 -07:00
base topology: convert cpu notifier to return encapsulate errno value 2010-05-27 09:12:48 -07:00
block Merge remote branch 'origin' into secretlab/next-devicetree 2010-05-22 00:36:56 -06:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2010-05-20 21:04:44 -07:00
cdrom of: Always use 'struct device.of_node' to get device node pointer. 2010-05-18 16:10:44 -06:00
char drop unused dentry argument to ->fsync 2010-05-27 22:05:02 -04:00
clocksource Merge branch 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-05-19 17:10:57 -07:00
connector
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cpufreq Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-05-18 08:49:13 -07:00
cpuidle Merge branch 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6 2010-05-28 16:14:17 -07:00
crypto Merge remote branch 'origin' into secretlab/next-devicetree 2010-05-22 00:36:56 -06:00
dca
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dio
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dma Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx 2010-05-30 09:12:43 -07:00
edac drivers/edac: convert logging messages direct uses of __FILE__ to %s, __FILE 2010-05-27 09:12:52 -07:00
eisa
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firewire Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2010-05-27 10:22:06 -07:00
firmware sysfs: add struct file* to bin_attr callbacks 2010-05-21 09:37:31 -07:00
gpio gpio: Fix inverted rdc321x gpio data out registers 2010-05-28 01:37:59 +02:00
gpu Merge branch 'drm-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-05-28 16:14:40 -07:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2010-05-27 09:19:55 -07:00
hwmon hwmon: (lm75) Add support for the Texas Instruments TMP105 2010-05-27 19:59:03 +02:00
i2c Merge remote branch 'origin' into secretlab/next-devicetree 2010-05-22 00:36:56 -06:00
ide m68k: amiga - Amiga Gayle IDE platform device conversion 2010-05-26 19:51:09 +02:00
idle intel_idle: native hardware cpuidle driver for latest Intel processors 2010-05-28 14:26:20 -04:00
ieee1394 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2010-05-27 10:22:06 -07:00
ieee802154
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infiniband Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband 2010-05-30 09:12:16 -07:00
input input: Touchscreen driver for TPS6507x 2010-05-28 01:37:38 +02:00
isdn drivers/isdn: Use memdup_user 2010-05-31 00:24:15 -07:00
leds leds: Fix leds-gpio openfirmware compile issue 2010-05-28 08:35:27 +01:00
lguest
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macintosh Merge branch 'bkl/ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing 2010-05-24 08:01:10 -07:00
mca
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md md: convert cpu notifier to return encapsulate errno value 2010-05-27 09:12:48 -07:00
media Merge branch 'bkl/ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing 2010-05-24 08:01:10 -07:00
memstick
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message drivers/message/i2o/i2o_config.c: use memdup_user 2010-05-27 09:12:41 -07:00
mfd mfd: Rename twl5031 sih modules 2010-05-28 01:38:02 +02:00
misc lktdm: add support for hardlockup, softlockup and hung task crashes 2010-05-27 09:12:54 -07:00
mmc drivers/mmc/host: use ERR_CAST 2010-05-27 09:12:40 -07:00
mtd drop unused dentry argument to ->fsync 2010-05-27 22:05:02 -04:00
net sfc: Recycle discarded rx buffers back onto the queue 2010-06-02 02:21:09 -07:00
nubus
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of Merge remote branch 'origin' into secretlab/next-devicetree 2010-05-22 00:36:56 -06:00
oprofile
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parisc
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parport m68k: amiga - Parallel port platform device conversion 2010-05-26 19:51:09 +02:00
pci Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2010-05-28 14:42:18 -07:00
pcmcia Merge branch 'bkl/ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing 2010-05-24 08:01:10 -07:00
platform Move N014, N051 and CR620 dmi information to load scm dmi table 2010-05-20 10:16:13 -04:00
pnp
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power Merge git://git.infradead.org/battery-2.6 2010-05-25 08:16:34 -07:00
pps
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ps3
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rapidio rapidio: fix new kernel-doc warnings 2010-05-30 09:02:47 -07:00
regulator mfd: AB3100 register access change to abx500 API 2010-05-28 01:37:45 +02:00
rtc mfd: AB3100 register access change to abx500 API 2010-05-28 01:37:45 +02:00
s390 [S390] dasd: unit check handling during internal cio I/O 2010-05-26 23:27:09 +02:00
sbus Merge branch 'bkl/ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing 2010-05-24 08:01:10 -07:00
scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2010-05-27 10:28:11 -07:00
serial ARM: S5PV210: serial: Fix section mismatch warning 2010-05-28 19:40:05 +09:00
sfi SFI: add sysfs interface for SFI tables. 2010-05-27 12:46:20 -04:00
sh
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sn
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spi spi/xilinx: Fix compile error 2010-05-25 00:48:24 -06:00
ssb ssb: fix NULL ptr deref when pcihost_wrapper is used 2010-05-28 13:57:01 -04:00
staging Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6 2010-05-30 09:11:11 -07:00
tc
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telephony drivers/telephony/ixj.c: use memdup_user 2010-05-27 09:12:42 -07:00
thermal
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uio
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usb drop unused dentry argument to ->fsync 2010-05-27 22:05:02 -04:00
uwb
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vhost Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-05-28 10:18:40 -07:00
video drop unused dentry argument to ->fsync 2010-05-27 22:05:02 -04:00
virtio Merge branch 'virtio' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus 2010-05-21 17:22:52 -07:00
vlynq
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w1 sysfs: add struct file* to bin_attr callbacks 2010-05-21 09:37:31 -07:00
watchdog mfd: Change rdc321x resources flags to IORESOURCE_IO 2010-05-28 01:37:52 +02:00
xen xen: fix build when SYSRQ is disabled 2010-05-25 08:07:07 -07:00
zorro sysfs: add struct file* to bin_attr callbacks 2010-05-21 09:37:31 -07:00
Kconfig
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Makefile intel_idle: native hardware cpuidle driver for latest Intel processors 2010-05-28 14:26:20 -04:00