The skb is usually started by a padding which allows the protocols in the
network stack to add their headers in front of the payload. The skb can be
reallocated in case the preallocated padding is not large enough. This can for
example happen in the function __skb_cow which will check the requested extra
headroom and allocate more buffer when the requested headroom is bigger than
the available one. The extra buffer is aligned again to the multiple of the
NET_SKB_PAD of the target architecture.
The macro used to create the multiple of the NET_SKB_PAD is written in a way
which allows only values power two as alignment parameter. The currently used
value of 48 bytes can not be written as n ** 2 but as 2 ** 4 + 2 ** 5. The
extra buffer is therefore not always the multiple of 48 but can be 16, 64, 80,
128, 144 and so on. The generated values are also not monotonic (48 requested
bytes are mapped to 80 allocated bytes and 49 requested bytes are mapped to 64
allocated bytes).
These unexpected small values result in more reallocations of the buffer. This
was noticed prominently during tests between two QCA9558 720 MHz devices which
were connected via ethernet to PCs and had a HT40 802.11n 3x3 link between each
other. The throughput PC-to-PC during iperf TCP runs increased reliable from
186 Mibit/s to 214 Mibit/s in one direction and from 195 Mibit/s to 220 Mibit/s
in the other direction. This is a performance increase of ~14% just by reducing
the amount of reallocations.
Signed-off-by: Sven Eckelmann <sven@open-mesh.com>
SVN-Revision: 37948
Currently, the module causes an oops at least on rt5350. These patches
have been accepted upstream at:
git://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git
Signed-off-by: Daniel Gimpelevich <daniel@gimpelevich.san-francisco.ca.us>
SVN-Revision: 37931
BCM5365 (and probably other older variants) use a different phy id, so
the phy driver never attached for them.
Fix this by adding the appropriate phy id to the fixup and the phy
driver.
Reported-by: Russell Senior <russell@personaltelco.net>
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
SVN-Revision: 37906
b53_no_ops has no elements and b53_port_ops has one element, this makes
the code access some random memory when trying to access the mib
counter functions.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
SVN-Revision: 37895
The myloader partition parser code uses ifdef wrappers
to make the code usable on kernels below version 3.2.
All targets are using kernel 3.3 at least so the wraper
is not needed. Remove that.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 37880
The 'Warning: unable to open an initial console' message
indicates an error in the rootfs. Remove the patch which
hides the warning.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 37848
Linux expects that the /dev/console node is present
in the rootfs image. Create the node in initramfs,
in order to make std{in,out,err} usable even in early
init process.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 37846
Fixes the following build error on ramips/rt3883:
arch/mips/pci/pci-rt3883.c:488:3: error: implicit declaration of function \
'of_pci_get_devfn' [-Werror=implicit-function-declaration]
cc1: some warnings being treated as errors
Although the function is only used by the PCI driver
of the RT3883 SoC but at the moment but it might be
useful for other targets as well.
Signed-off-by: Michael Lee <igvtee@gmail.com>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 37826
vsnprintf returns the number of chars that would have been written, not
the actual number of chars written. This can lead to crashlog_buf->len
being too big which in turn can lead to get_maxlen() returning negative
numbers. The length argument of kmsg_dump_get_buffer will be casted to
a size_t which makes a negative input a big positive number allowing
kmsg_dump_get_buffer to write out of bounds.
Fix this by using vscnprintf which returns the actually written number
of chars.
Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
SVN-Revision: 37820
The patch in question has been accepted upstream in commit:
55bf75b7dd8ec875d048824f3cdecf8254e292e5
Signed-off-by: Luka Perkov <luka@openwrt.org>
SVN-Revision: 37807
The BCM4331 supports a PCIe max request size of 512 bytes and uses
that, but the PCIe controller in the BCM4706 just supports 128 Bytes
and that causes a DMA error for packages bigger than 126 bytes. This
fixes the problem by setting the BCM4331 also to 128 Bytes.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
SVN-Revision: 37709
brcm47xx does not use CONFIG_B53_SPI_DRIVER, but it could be selected if spi is build as a module
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
SVN-Revision: 37656
OCF_CRYPTOSOFT uses both symbols form crypto_hash and crypto_blkcipher,
so let it select these through kernel config.
Fixes the following build error:
ERROR: "crypto_alloc_ahash" [crypto/ocf/cryptosoft.ko] undefined!
ERROR: "crypto_ahash_digest" [crypto/ocf/cryptosoft.ko] undefined!
ERROR: "crypto_ahash_setkey" [crypto/ocf/cryptosoft.ko] undefined!
make[6]: *** [__modpost] Error 1
make[5]: *** [modules] Error 2
Reported-by: Russell Senior <russell@personaltelco.net>
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
SVN-Revision: 37652
This is needed for some switches used on bcm47xx SoCs like the one on the Asus RT-N66U.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
SVN-Revision: 37645
Get rid of some ifdefs, and make sure that the microMIPS
specific code is disabled as well.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 37506
